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2013-06-19FS-Cache: Uninline fscache_object_init()David Howells1-2/+38
Uninline fscache_object_init() so as not to expose some of the FS-Cache internals to the cache backend. Signed-off-by: David Howells <dhowells@redhat.com> Tested-By: Milosz Tanski <milosz@adfin.com> Acked-by: Jeff Layton <jlayton@redhat.com>
2013-06-19FS-Cache: Don't sleep in page release if __GFP_FS is not setDavid Howells1-1/+1
Don't sleep in __fscache_maybe_release_page() if __GFP_FS is not set. This goes some way towards mitigating fscache deadlocking against ext4 by way of the allocator, eg: INFO: task flush-8:0:24427 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. flush-8:0 D ffff88003e2b9fd8 0 24427 2 0x00000000 ffff88003e2b9138 0000000000000046 ffff880012e3a040 ffff88003e2b9fd8 0000000000011c80 ffff88003e2b9fd8 ffffffff81a10400 ffff880012e3a040 0000000000000002 ffff880012e3a040 ffff88003e2b9098 ffffffff8106dcf5 Call Trace: [<ffffffff8106dcf5>] ? __lock_is_held+0x31/0x53 [<ffffffff81219b61>] ? radix_tree_lookup_element+0xf4/0x12a [<ffffffff81454bed>] schedule+0x60/0x62 [<ffffffffa01d349c>] __fscache_wait_on_page_write+0x8b/0xa5 [fscache] [<ffffffff810498a8>] ? __init_waitqueue_head+0x4d/0x4d [<ffffffffa01d393a>] __fscache_maybe_release_page+0x30c/0x324 [fscache] [<ffffffffa01d369a>] ? __fscache_maybe_release_page+0x6c/0x324 [fscache] [<ffffffff81071b53>] ? trace_hardirqs_on_caller+0x114/0x170 [<ffffffffa01fd7b2>] nfs_fscache_release_page+0x68/0x94 [nfs] [<ffffffffa01ef73e>] nfs_release_page+0x7e/0x86 [nfs] [<ffffffff810aa553>] try_to_release_page+0x32/0x3b [<ffffffff810b6c70>] shrink_page_list+0x535/0x71a [<ffffffff81071b53>] ? trace_hardirqs_on_caller+0x114/0x170 [<ffffffff810b7352>] shrink_inactive_list+0x20a/0x2dd [<ffffffff81071a13>] ? mark_held_locks+0xbe/0xea [<ffffffff810b7a65>] shrink_lruvec+0x34c/0x3eb [<ffffffff810b7bd3>] do_try_to_free_pages+0xcf/0x355 [<ffffffff810b7fc8>] try_to_free_pages+0x9a/0xa1 [<ffffffff810b08d2>] __alloc_pages_nodemask+0x494/0x6f7 [<ffffffff810d9a07>] kmem_getpages+0x58/0x155 [<ffffffff810dc002>] fallback_alloc+0x120/0x1f3 [<ffffffff8106db23>] ? trace_hardirqs_off+0xd/0xf [<ffffffff810dbed3>] ____cache_alloc_node+0x177/0x186 [<ffffffff81162a6c>] ? ext4_init_io_end+0x1c/0x37 [<ffffffff810dc403>] kmem_cache_alloc+0xf1/0x176 [<ffffffff810b17ac>] ? test_set_page_writeback+0x101/0x113 [<ffffffff81162a6c>] ext4_init_io_end+0x1c/0x37 [<ffffffff81162ce4>] ext4_bio_write_page+0x20f/0x3af [<ffffffff8115cc02>] mpage_da_submit_io+0x26e/0x2f6 [<ffffffff811088e5>] ? __find_get_block_slow+0x38/0x133 [<ffffffff81161348>] mpage_da_map_and_submit+0x3a7/0x3bd [<ffffffff81161a60>] ext4_da_writepages+0x30d/0x426 [<ffffffff810b3359>] do_writepages+0x1c/0x2a [<ffffffff81102f4d>] __writeback_single_inode+0x3e/0xe5 [<ffffffff81103995>] writeback_sb_inodes+0x1bd/0x2f4 [<ffffffff81103b3b>] __writeback_inodes_wb+0x6f/0xb4 [<ffffffff81103c81>] wb_writeback+0x101/0x195 [<ffffffff81071b53>] ? trace_hardirqs_on_caller+0x114/0x170 [<ffffffff811043aa>] ? wb_do_writeback+0xaa/0x173 [<ffffffff8110434a>] wb_do_writeback+0x4a/0x173 [<ffffffff81071bbc>] ? trace_hardirqs_on+0xd/0xf [<ffffffff81038554>] ? del_timer+0x4b/0x5b [<ffffffff811044e0>] bdi_writeback_thread+0x6d/0x147 [<ffffffff81104473>] ? wb_do_writeback+0x173/0x173 [<ffffffff81048fbc>] kthread+0xd0/0xd8 [<ffffffff81455eb2>] ? _raw_spin_unlock_irq+0x29/0x3e [<ffffffff81048eec>] ? __init_kthread_worker+0x55/0x55 [<ffffffff81456aac>] ret_from_fork+0x7c/0xb0 [<ffffffff81048eec>] ? __init_kthread_worker+0x55/0x55 2 locks held by flush-8:0/24427: #0: (&type->s_umount_key#41){.+.+..}, at: [<ffffffff810e3b73>] grab_super_passive+0x4c/0x76 #1: (jbd2_handle){+.+...}, at: [<ffffffff81190d81>] start_this_handle+0x475/0x4ea The problem here is that another thread, which is attempting to write the to-be-stored NFS page to the on-ext4 cache file is waiting for the journal lock, eg: INFO: task kworker/u:2:24437 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u:2 D ffff880039589768 0 24437 2 0x00000000 ffff8800395896d8 0000000000000046 ffff8800283bf040 ffff880039589fd8 0000000000011c80 ffff880039589fd8 ffff880039f0b040 ffff8800283bf040 0000000000000006 ffff8800283bf6b8 ffff880039589658 ffffffff81071a13 Call Trace: [<ffffffff81071a13>] ? mark_held_locks+0xbe/0xea [<ffffffff81455e73>] ? _raw_spin_unlock_irqrestore+0x3a/0x50 [<ffffffff81071b53>] ? trace_hardirqs_on_caller+0x114/0x170 [<ffffffff81071bbc>] ? trace_hardirqs_on+0xd/0xf [<ffffffff81454bed>] schedule+0x60/0x62 [<ffffffff81190c23>] start_this_handle+0x317/0x4ea [<ffffffff810498a8>] ? __init_waitqueue_head+0x4d/0x4d [<ffffffff81190fcc>] jbd2__journal_start+0xb3/0x12e [<ffffffff81176606>] __ext4_journal_start_sb+0xb2/0xc6 [<ffffffff8115f137>] ext4_da_write_begin+0x109/0x233 [<ffffffff810a964d>] generic_file_buffered_write+0x11a/0x264 [<ffffffff811032cf>] ? __mark_inode_dirty+0x2d/0x1ee [<ffffffff810ab1ab>] __generic_file_aio_write+0x2a5/0x2d5 [<ffffffff810ab24a>] generic_file_aio_write+0x6f/0xd0 [<ffffffff81159a2c>] ext4_file_write+0x38c/0x3c4 [<ffffffff810e0915>] do_sync_write+0x91/0xd1 [<ffffffffa00a17f0>] cachefiles_write_page+0x26f/0x310 [cachefiles] [<ffffffffa01d470b>] fscache_write_op+0x21e/0x37a [fscache] [<ffffffff81455eb2>] ? _raw_spin_unlock_irq+0x29/0x3e [<ffffffffa01d2479>] fscache_op_work_func+0x78/0xd7 [fscache] [<ffffffff8104455a>] process_one_work+0x232/0x3a8 [<ffffffff810444ff>] ? process_one_work+0x1d7/0x3a8 [<ffffffff81044ee0>] worker_thread+0x214/0x303 [<ffffffff81044ccc>] ? manage_workers+0x245/0x245 [<ffffffff81048fbc>] kthread+0xd0/0xd8 [<ffffffff81455eb2>] ? _raw_spin_unlock_irq+0x29/0x3e [<ffffffff81048eec>] ? __init_kthread_worker+0x55/0x55 [<ffffffff81456aac>] ret_from_fork+0x7c/0xb0 [<ffffffff81048eec>] ? __init_kthread_worker+0x55/0x55 4 locks held by kworker/u:2/24437: #0: (fscache_operation){.+.+.+}, at: [<ffffffff810444ff>] process_one_work+0x1d7/0x3a8 #1: ((&op->work)){+.+.+.}, at: [<ffffffff810444ff>] process_one_work+0x1d7/0x3a8 #2: (sb_writers#14){.+.+.+}, at: [<ffffffff810ab22c>] generic_file_aio_write+0x51/0xd0 #3: (&sb->s_type->i_mutex_key#19){+.+.+.}, at: [<ffffffff810ab236>] generic_file_aio_write+0x5b/0x fscache already tries to cancel pending stores, but it can't cancel a write for which I/O is already in progress. An alternative would be to accept writing garbage to the cache under extreme circumstances and to kill the afflicted cache object if we have to do this. However, we really need to know how strapped the allocator is before deciding to do that. Signed-off-by: David Howells <dhowells@redhat.com> Tested-By: Milosz Tanski <milosz@adfin.com> Acked-by: Jeff Layton <jlayton@redhat.com>
2013-06-19CacheFiles: name i_mutex lock class explicitlyJ. Bruce Fields1-1/+1
Just some cleanup. (And note the caller of this function may, for example, call vfs_unlink on a child, so the "1" (I_MUTEX_PARENT) really was what was intended here.) Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: David Howells <dhowells@redhat.com> Tested-By: Milosz Tanski <milosz@adfin.com> Acked-by: Jeff Layton <jlayton@redhat.com>
2013-06-19fs/fscache: remove spin_lock() from the condition in while()Sebastian Andrzej Siewior1-6/+10
The spinlock() within the condition in while() will cause a compile error if it is not a function. This is not a problem on mainline but it does not look pretty and there is no reason to do it that way. That patch writes it a little differently and avoids the double condition. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: David Howells <dhowells@redhat.com> Tested-By: Milosz Tanski <milosz@adfin.com> Acked-by: Jeff Layton <jlayton@redhat.com>
2013-05-14Merge tag 'ext4_for_linus_stable' of ↵Linus Torvalds8-142/+111
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 update from Ted Ts'o: "Fixed regressions (two stability regressions and a performance regression) introduced during the 3.10-rc1 merge window. Also included is a bug fix relating to allocating blocks after resizing an ext3 file system when using the ext4 file system driver" * tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: jbd,jbd2: fix oops in jbd2_journal_put_journal_head() ext4: revert "ext4: use io_end for multiple bios" ext4: limit group search loop for non-extent files ext4: fix fio regression
2013-05-12ext4: revert "ext4: use io_end for multiple bios"Theodore Ts'o3-129/+85
This reverts commit 4eec708d263f0ee10861d69251708a225b64cac7. Multiple users have reported crashes which is apparently caused by this commit. Thanks to Dmitry Monakhov for bisecting it. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: Dmitry Monakhov <dmonakhov@openvz.org> Cc: Jan Kara <jack@suse.cz>
2013-05-12Merge git://git.infradead.org/users/eparis/auditLinus Torvalds1-1/+1
Pull audit changes from Eric Paris: "Al used to send pull requests every couple of years but he told me to just start pushing them to you directly. Our touching outside of core audit code is pretty straight forward. A couple of interface changes which hit net/. A simple argument bug calling audit functions in namei.c and the removal of some assembly branch prediction code on ppc" * git://git.infradead.org/users/eparis/audit: (31 commits) audit: fix message spacing printing auid Revert "audit: move kaudit thread start from auditd registration to kaudit init" audit: vfs: fix audit_inode call in O_CREAT case of do_last audit: Make testing for a valid loginuid explicit. audit: fix event coverage of AUDIT_ANOM_LINK audit: use spin_lock in audit_receive_msg to process tty logging audit: do not needlessly take a lock in tty_audit_exit audit: do not needlessly take a spinlock in copy_signal audit: add an option to control logging of passwords with pam_tty_audit audit: use spin_lock_irqsave/restore in audit tty code helper for some session id stuff audit: use a consistent audit helper to log lsm information audit: push loginuid and sessionid processing down audit: stop pushing loginid, uid, sessionid as arguments audit: remove the old depricated kernel interface audit: make validity checking generic audit: allow checking the type of audit message in the user filter audit: fix build break when AUDIT_DEBUG == 2 audit: remove duplicate export of audit_enabled Audit: do not print error when LSMs disabled ...
2013-05-10Merge branch 'for-3.10' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2-9/+18
Pull nfsd fixes from Bruce Fields: "Small fixes for two bugs and two warnings" * 'for-3.10' of git://linux-nfs.org/~bfields/linux: nfsd: fix oops when legacy_recdir_name_error is passed a -ENOENT error SUNRPC: fix decoding of optional gss-proxy xdr fields SUNRPC: Refactor gssx_dec_option_array() to kill uninitialized warning nfsd4: don't allow owner override on 4.1 CLAIM_FH opens
2013-05-10Merge branch 'for-linus' of ↵Linus Torvalds1-0/+17
git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal Pull stray syscall bits from Al Viro: "Several syscall-related commits that were missing from the original" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: switch compat_sys_sysctl to COMPAT_SYSCALL_DEFINE unicore32: just use mmap_pgoff()... unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE x86, vm86: fix VM86 syscalls: use SYSCALL_DEFINEx(...)
2013-05-10Merge tag 'ecryptfs-3.10-rc1-ablkcipher' of ↵Linus Torvalds2-41/+103
git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs Pull eCryptfs update from Tyler Hicks: "Improve performance when AES-NI (and most likely other crypto accelerators) is available by moving to the ablkcipher crypto API. The improvement is more apparent on faster storage devices. There's no noticeable change when hardware crypto is not available" * tag 'ecryptfs-3.10-rc1-ablkcipher' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs: eCryptfs: Use the ablkcipher crypto API
2013-05-10Merge branch 'for-next' of ↵Linus Torvalds1-1/+4
git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu Pull m68knommu updates from Greg Ungerer: "The bulk of the changes are generalizing the ColdFire v3 core support and adding in 537x CPU support. Also a couple of other bug fixes, one to fix a reintroduction of a past bug in the romfs filesystem nommu support." * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: m68knommu: enable Timer on coldfire 532x m68knommu: fix ColdFire 5373/5329 QSPI base address m68knommu: add support for configuring a Freescale M5373EVB board m68knommu: add support for the ColdFire 537x family of CPUs m68knommu: make ColdFire M532x platform support more v3 generic m68knommu: create and use a common M53xx ColdFire class of CPUs m68k: remove unused asm/dbg.h m68k: Set ColdFire ACR1 cache mode depending on kernel configuration romfs: fix nommu map length to keep inside filesystem m68k: clean up unused "config ROMVECSIZE"
2013-05-10eCryptfs: Use the ablkcipher crypto APITyler Hicks2-41/+103
Make the switch from the blkcipher kernel crypto interface to the ablkcipher interface. encrypt_scatterlist() and decrypt_scatterlist() now use the ablkcipher interface but, from the eCryptfs standpoint, still treat the crypto operation as a synchronous operation. They submit the async request and then wait until the operation is finished before they return. Most of the changes are contained inside those two functions. Despite waiting for the completion of the crypto operation, the ablkcipher interface provides performance increases in most cases when used on AES-NI capable hardware. Signed-off-by: Tyler Hicks <tyhicks@canonical.com> Acked-by: Colin King <colin.king@canonical.com> Reviewed-by: Zeev Zilberman <zeev@annapurnaLabs.com> Cc: Dustin Kirkland <dustin.kirkland@gazzang.com> Cc: Tim Chen <tim.c.chen@intel.com> Cc: Ying Huang <ying.huang@intel.com> Cc: Thieu Le <thieule@google.com> Cc: Li Wang <dragonylffly@163.com> Cc: Jarkko Sakkinen <jarkko.sakkinen@iki.fi>
2013-05-10Merge tag 'please-pull-pstore' of ↵Linus Torvalds1-0/+2
git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux Pull trivial pstore update from Tony Luck: "Couple of pstore cleanups" It turns out that the kmemdup() conversion ends up being undone by the fact that the memory block also needed the ecc information (see commit bd08ec33b5c2: "pstore/ram: Restore ecc information block"), so all that remains after merging is the error return code change. * tag 'please-pull-pstore' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux: pstore/ram: fix error return code in ramoops_probe() fs: pstore: Replaced calls to kmalloc and memcpy with kmemdup
2013-05-10Merge branch 'for-linus' of ↵Linus Torvalds1-8/+1
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull more vfs fixes from Al Viro: "Regression fix from Geert + yet another open-coded kernel_read()" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: ecryptfs: don't open-code kernel_read() xtensa simdisk: Fix proc_create_data() conversion fallout
2013-05-10Merge branch 'for-linus' of ↵Linus Torvalds48-1902/+3215
git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs Pull btrfs update from Chris Mason: "These are mostly fixes. The biggest exceptions are Josef's skinny extents and Jan Schmidt's code to rebuild our quota indexes if they get out of sync (or you enable quotas on an existing filesystem). The skinny extents are off by default because they are a new variation on the extent allocation tree format. btrfstune -x enables them, and the new format makes the extent allocation tree about 30% smaller. I rebased this a few days ago to rework Dave Sterba's crc checks on the super block, but almost all of these go back to rc6, since I though 3.9 was due any minute. The biggest missing fix is the tracepoint bug that was hit late in 3.9. I ran into problems with that in overnight testing and I'm still tracking it down. I'll definitely have that fixed for rc2." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (101 commits) Btrfs: allow superblock mismatch from older mkfs btrfs: enhance superblock checks btrfs: fix misleading variable name for flags btrfs: use unsigned long type for extent state bits Btrfs: improve the loop of scrub_stripe btrfs: read entire device info under lock btrfs: remove unused gfp mask parameter from release_extent_buffer callchain btrfs: handle errors returned from get_tree_block_key btrfs: make static code static & remove dead code Btrfs: deal with errors in write_dev_supers Btrfs: remove almost all of the BUG()'s from tree-log.c Btrfs: deal with free space cache errors while replaying log Btrfs: automatic rescan after "quota enable" command Btrfs: rescan for qgroups Btrfs: split btrfs_qgroup_account_ref into four functions Btrfs: allocate new chunks if the space is not enough for global rsv Btrfs: separate sequence numbers for delayed ref tracking and tree mod log btrfs: move leak debug code to functions Btrfs: return free space in cow error path Btrfs: set UUID in root_item for created trees ...
2013-05-10Merge tag 'for-linus-v3.10-rc1-2' of git://oss.sgi.com/xfs/xfsLinus Torvalds15-32/+83
Pull xfs update (#2) from Ben Myers: - add CONFIG_XFS_WARN, a step between zero debugging and CONFIG_XFS_DEBUG. - fix attrmulti and attrlist to fall back to vmalloc when kmalloc fails. * tag 'for-linus-v3.10-rc1-2' of git://oss.sgi.com/xfs/xfs: xfs: fallback to vmalloc for large buffers in xfs_compat_attrlist_by_handle xfs: fallback to vmalloc for large buffers in xfs_attrlist_by_handle xfs: introduce CONFIG_XFS_WARN
2013-05-09unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINEAl Viro1-0/+17
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-05-09ecryptfs: don't open-code kernel_read()Al Viro1-8/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-05-09Merge tag 'nfs-for-3.10-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds7-42/+169
Pull more NFS client bugfixes from Trond Myklebust: - Ensure that we match the 'sec=' mount flavour against the server list - Fix the NFSv4 byte range locking in the presence of delegations - Ensure that we conform to the NFSv4.1 spec w.r.t. freeing lock stateids - Fix a pNFS data server connection race * tag 'nfs-for-3.10-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: NFS4.1 Fix data server connection race NFSv3: match sec= flavor against server list NFSv4.1: Ensure that we free the lock stateid on the server NFSv4: Convert nfs41_free_stateid to use an asynchronous RPC call SUNRPC: Don't spam syslog with "Pseudoflavor not found" messages NFSv4.x: Fix handling of partially delegated locks
2013-05-09nfsd: fix oops when legacy_recdir_name_error is passed a -ENOENT errorJeff Layton1-7/+5
Toralf reported the following oops to the linux-nfs mailing list: -----------------[snip]------------------ NFSD: unable to generate recoverydir name (-2). NFSD: disabling legacy clientid tracking. Reboot recovery will not function correctly! BUG: unable to handle kernel NULL pointer dereference at 000003c8 IP: [<f90a3d91>] nfsd4_client_tracking_exit+0x11/0x50 [nfsd] *pdpt = 000000002ba33001 *pde = 0000000000000000 Oops: 0000 [#1] SMP Modules linked in: loop nfsd auth_rpcgss ipt_MASQUERADE xt_owner xt_multiport ipt_REJECT xt_tcpudp xt_recent xt_conntrack nf_conntrack_ftp xt_limit xt_LOG iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_filter ip_tables x_tables af_packet pppoe pppox ppp_generic slhc bridge stp llc tun arc4 iwldvm mac80211 coretemp kvm_intel uvcvideo sdhci_pci sdhci mmc_core videobuf2_vmalloc videobuf2_memops usblp videobuf2_core i915 iwlwifi psmouse videodev cfg80211 kvm fbcon bitblit cfbfillrect acpi_cpufreq mperf evdev softcursor font cfbimgblt i2c_algo_bit cfbcopyarea intel_agp intel_gtt drm_kms_helper snd_hda_codec_conexant drm agpgart fb fbdev tpm_tis thinkpad_acpi tpm nvram e1000e rfkill thermal ptp wmi pps_core tpm_bios 8250_pci processor 8250 ac snd_hda_intel snd_hda_codec snd_pcm battery video i2c_i801 snd_page_alloc snd_timer button serial_core i2c_core snd soundcore thermal_sys hwmon aesni_intel ablk_helper cryp td lrw aes_i586 xts gf128mul cbc fuse nfs lockd sunrpc dm_crypt dm_mod hid_monterey hid_microsoft hid_logitech hid_ezkey hid_cypress hid_chicony hid_cherry hid_belkin hid_apple hid_a4tech hid_generic usbhid hid sr_mod cdrom sg [last unloaded: microcode] Pid: 6374, comm: nfsd Not tainted 3.9.1 #6 LENOVO 4180F65/4180F65 EIP: 0060:[<f90a3d91>] EFLAGS: 00010202 CPU: 0 EIP is at nfsd4_client_tracking_exit+0x11/0x50 [nfsd] EAX: 00000000 EBX: fffffffe ECX: 00000007 EDX: 00000007 ESI: eb9dcb00 EDI: eb2991c0 EBP: eb2bde38 ESP: eb2bde34 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 CR0: 80050033 CR2: 000003c8 CR3: 2ba80000 CR4: 000407f0 DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 DR6: ffff0ff0 DR7: 00000400 Process nfsd (pid: 6374, ti=eb2bc000 task=eb2711c0 task.ti=eb2bc000) Stack: fffffffe eb2bde4c f90a3e0c f90a7754 fffffffe eb0a9c00 eb2bdea0 f90a41ed eb2991c0 1b270000 eb2991c0 eb2bde7c f9099ce9 eb2bde98 0129a020 eb29a020 eb2bdecc eb2991c0 eb2bdea8 f9099da5 00000000 eb9dcb00 00000001 67822f08 Call Trace: [<f90a3e0c>] legacy_recdir_name_error+0x3c/0x40 [nfsd] [<f90a41ed>] nfsd4_create_clid_dir+0x15d/0x1c0 [nfsd] [<f9099ce9>] ? nfsd4_lookup_stateid+0x99/0xd0 [nfsd] [<f9099da5>] ? nfs4_preprocess_seqid_op+0x85/0x100 [nfsd] [<f90a4287>] nfsd4_client_record_create+0x37/0x50 [nfsd] [<f909d6ce>] nfsd4_open_confirm+0xfe/0x130 [nfsd] [<f90980b1>] ? nfsd4_encode_operation+0x61/0x90 [nfsd] [<f909d5d0>] ? nfsd4_free_stateid+0xc0/0xc0 [nfsd] [<f908fd0b>] nfsd4_proc_compound+0x41b/0x530 [nfsd] [<f9081b7b>] nfsd_dispatch+0x8b/0x1a0 [nfsd] [<f857b85d>] svc_process+0x3dd/0x640 [sunrpc] [<f908165d>] nfsd+0xad/0x110 [nfsd] [<f90815b0>] ? nfsd_destroy+0x70/0x70 [nfsd] [<c1054824>] kthread+0x94/0xa0 [<c1486937>] ret_from_kernel_thread+0x1b/0x28 [<c1054790>] ? flush_kthread_work+0xd0/0xd0 Code: 86 b0 00 00 00 90 c5 0a f9 c7 04 24 70 76 0a f9 e8 74 a9 3d c8 eb ba 8d 76 00 55 89 e5 53 66 66 66 66 90 8b 15 68 c7 0a f9 85 d2 <8b> 88 c8 03 00 00 74 2c 3b 11 77 28 8b 5c 91 08 85 db 74 22 8b EIP: [<f90a3d91>] nfsd4_client_tracking_exit+0x11/0x50 [nfsd] SS:ESP 0068:eb2bde34 CR2: 00000000000003c8 ---[ end trace 09e54015d145c9c6 ]--- The problem appears to be a regression that was introduced in commit 9a9c6478 "nfsd: make NFSv4 recovery client tracking options per net". Prior to that commit, it was safe to pass a NULL net pointer to nfsd4_client_tracking_exit in the legacy recdir case, and legacy_recdir_name_error did so. After that comit, the net pointer must be valid. This patch just fixes legacy_recdir_name_error to pass in a valid net pointer to that function. Cc: <stable@vger.kernel.org> # v3.8+ Cc: Stanislav Kinsbursky <skinsbursky@parallels.com> Reported-and-tested-by: Toralf Förster <toralf.foerster@gmx.de> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-05-09Merge tag 'f2fs-for-v3.10' of ↵Linus Torvalds17-682/+982
git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs updates from Jaegeuk Kim: "This patch-set includes the following major enhancement patches. - introduce a new gloabl lock scheme - add tracepoints on several major functions - fix the overall cleaning process focused on victim selection - apply the block plugging to merge IOs as much as possible - enhance management of free nids and its list - enhance the readahead mode for node pages - address several cretical deadlock conditions - reduce lock_page calls The other minor bug fixes and enhancements are as follows. - calculation mistakes: overflow - bio types: READ, READA, and READ_SYNC - fix the recovery flow, data races, and null pointer errors" * tag 'f2fs-for-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (68 commits) f2fs: cover free_nid management with spin_lock f2fs: optimize scan_nat_page() f2fs: code cleanup for scan_nat_page() and build_free_nids() f2fs: bugfix for alloc_nid_failed() f2fs: recover when journal contains deleted files f2fs: continue to mount after failing recovery f2fs: avoid deadlock during evict after f2fs_gc f2fs: modify the number of issued pages to merge IOs f2fs: remove useless #include <linux/proc_fs.h> as we're now using sysfs as debug entry. f2fs: fix inconsistent using of NM_WOUT_THRESHOLD f2fs: check truncation of mapping after lock_page f2fs: enhance alloc_nid and build_free_nids flows f2fs: add a tracepoint on f2fs_new_inode f2fs: check nid == 0 in add_free_nid f2fs: add REQ_META about metadata requests for submit f2fs: give a chance to merge IOs by IO scheduler f2fs: avoid frequent background GC f2fs: add tracepoints to debug checkpoint request f2fs: add tracepoints for write page operations f2fs: add tracepoints to debug the block allocation ...
2013-05-09NFS4.1 Fix data server connection raceAndy Adamson2-2/+26
Unlike meta data server mounts which support multiple mount points to the same server via struct nfs_server, data servers support a single connection. Concurrent calls to setup the data server connection can race where the first call allocates the nfs_client struct, and before the cache struct nfs_client pointer can be set, a second call also tries to setup the connection, finds the already allocated nfs_client, bumps the reference count, re-initializes the session,etc. This results in a hanging data server session after umount. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-05-08pstore/ram: fix error return code in ramoops_probe()Wei Yongjun1-0/+2
Fix to return a negative error code from the error handling case instead of 0, as done elsewhere in this function. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
2013-05-08Merge branch 'for-3.10/core' of git://git.kernel.dk/linux-blockLinus Torvalds13-221/+420
Pull block core updates from Jens Axboe: - Major bit is Kents prep work for immutable bio vecs. - Stable candidate fix for a scheduling-while-atomic in the queue bypass operation. - Fix for the hang on exceeded rq->datalen 32-bit unsigned when merging discard bios. - Tejuns changes to convert the writeback thread pool to the generic workqueue mechanism. - Runtime PM framework, SCSI patches exists on top of these in James' tree. - A few random fixes. * 'for-3.10/core' of git://git.kernel.dk/linux-block: (40 commits) relay: move remove_buf_file inside relay_close_buf partitions/efi.c: replace useless kzalloc's by kmalloc's fs/block_dev.c: fix iov_shorten() criteria in blkdev_aio_read() block: fix max discard sectors limit blkcg: fix "scheduling while atomic" in blk_queue_bypass_start Documentation: cfq-iosched: update documentation help for cfq tunables writeback: expose the bdi_wq workqueue writeback: replace custom worker pool implementation with unbound workqueue writeback: remove unused bdi_pending_list aoe: Fix unitialized var usage bio-integrity: Add explicit field for owner of bip_buf block: Add an explicit bio flag for bios that own their bvec block: Add bio_alloc_pages() block: Convert some code to bio_for_each_segment_all() block: Add bio_for_each_segment_all() bounce: Refactor __blk_queue_bounce to not use bi_io_vec raid1: use bio_copy_data() pktcdvd: Use bio_reset() in disabled code to kill bi_idx usage pktcdvd: use bio_copy_data() block: Add bio_copy_data() ...
2013-05-08f2fs: cover free_nid management with spin_lockJaegeuk Kim1-16/+18
After build_free_nids() searches free nid candidates from nat pages and current journal blocks, it checks all the candidates if they are allocated so that the nat cache has its nid with an allocated block address. In this procedure, previously we used list_for_each_entry_safe(fnid, next_fnid, &nm_i->free_nid_list, list). But, this is not covered by free_nid_list_lock, resulting in null pointer bug. This patch moves this checking routine inside add_free_nid() in order not to use the spin_lock. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-05-08f2fs: optimize scan_nat_page()Haicheng Li1-5/+9
When nm_i->fcnt > 2 * MAX_FREE_NIDS, stop scanning other NAT entries. Signed-off-by: Haicheng Li <haicheng.li@linux.intel.com> [Jaegeuk Kim: fix handling the return value of add_free_nid()] Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-05-08f2fs: code cleanup for scan_nat_page() and build_free_nids()Haicheng Li1-6/+4
This patch does two cleanups: 1. remove unused variable "fcnt" in build_free_nids(). 2. make scan_nat_page() as void type and remove useless variable "fcnt". Signed-off-by: Haicheng Li <haicheng.li@linux.intel.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-05-08f2fs: bugfix for alloc_nid_failed()Haicheng Li1-2/+6
Directly drop the free_nid cache when nm_i->fcnt > 2 * MAX_FREE_NIDS Since there is NOT nmi->free_nid_list_lock spinlock protection between a sequential calling of alloc_nid() and alloc_nid_failed(), some other threads may already add new free_nid to the free_nid_list during this period. We need to make sure nmi->fcnt is never > 2 * MAX_FREE_NIDS. Signed-off-by: Haicheng Li <haicheng.li@linux.intel.com> [Jaegeuk Kim: fit the coding style] Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-05-08f2fs: recover when journal contains deleted filesChris Fries1-2/+6
When recovering a journal file with fsync data for files that have been deleted, don't bail out on recovery. Signed-off-by: Chris Fries <C.Fries@motorola.com> Reviewed-by: Russell Knize <rknize2@motorola.com> Reviewed-by: Jason Hrycay <jason.hrycay@motorola.com> [Jaegeuk Kim: fit the coding style] Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-05-08f2fs: continue to mount after failing recoveryChris Fries1-4/+3
When unable to roll forward the journal, we shouldn't bail out and not mount, we should continue to attempt the mount. Bad recovery data is likely unrecoverable at this point, and requiring the user to try to mount again doesn't solve any issues. Signed-off-by: Chris Fries <C.Fries@motorola.com> Reviewed-by: Russell Knize <rknize2@motorola.com> Reviewed-by: Jason Hrycay <jason.hrycay@motorola.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-05-08f2fs: avoid deadlock during evict after f2fs_gcJaegeuk Kim3-2/+26
o Deadlock case #1 Thread 1: - writeback_sb_inodes - do_writepages - f2fs_write_data_pages - write_cache_pages - f2fs_write_data_page - f2fs_balance_fs - wait mutex_lock(gc_mutex) Thread 2: - f2fs_balance_fs - mutex_lock(gc_mutex) - f2fs_gc - f2fs_iget - wait iget_locked(inode->i_lock) Thread 3: - do_unlinkat - iput - lock(inode->i_lock) - evict - inode_wait_for_writeback o Deadlock case #2 Thread 1: - __writeback_single_inode : set I_SYNC - do_writepages - f2fs_write_data_page - f2fs_balance_fs - f2fs_gc - iput - evict - inode_wait_for_writeback(I_SYNC) In order to avoid this, even though iput is called with the zero-reference count, we need to stop the eviction procedure if the inode is on writeback. So this patch links f2fs_drop_inode which checks the I_SYNC flag. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-05-08Merge branch 'akpm' (incoming from Andrew)Linus Torvalds41-1077/+602
Merge more incoming from Andrew Morton: - Various fixes which were stalled or which I picked up recently - A large rotorooting of the AIO code. Allegedly to improve performance but I don't really have good performance numbers (I might have lost the email) and I can't raise Kent today. I held this out of 3.9 and we could give it another cycle if it's all too late/scary. I ended up taking only the first two thirds of the AIO rotorooting. I left the percpu parts and the batch completion for later. - Linus * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (33 commits) aio: don't include aio.h in sched.h aio: kill ki_retry aio: kill ki_key aio: give shared kioctx fields their own cachelines aio: kill struct aio_ring_info aio: kill batch allocation aio: change reqs_active to include unreaped completions aio: use cancellation list lazily aio: use flush_dcache_page() aio: make aio_read_evt() more efficient, convert to hrtimers wait: add wait_event_hrtimeout() aio: refcounting cleanup aio: make aio_put_req() lockless aio: do fget() after aio_get_req() aio: dprintk() -> pr_debug() aio: move private stuff out of aio.h aio: add kiocb_cancel() aio: kill return value of aio_complete() char: add aio_{read,write} to /dev/{null,zero} aio: remove retry-based AIO ...
2013-05-08aio: don't include aio.h in sched.hKent Overstreet38-3/+38
Faster kernel compiles by way of fewer unnecessary includes. [akpm@linux-foundation.org: fix fallout] [akpm@linux-foundation.org: fix build] Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Reviewed-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-08aio: kill ki_retryKent Overstreet1-139/+85
Thanks to Zach Brown's work to rip out the retry infrastructure, we don't need this anymore - ki_retry was only called right after the kiocb was initialized. This also refactors and trims some duplicated code, as well as cleaning up the refcounting/error handling a bit. [akpm@linux-foundation.org: use fmode_t in aio_run_iocb()] [akpm@linux-foundation.org: fix file_start_write/file_end_write tests] [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Reviewed-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-08aio: kill ki_keyKent Overstreet1-2/+5
ki_key wasn't actually used for anything previously - it was always 0. Drop it to trim struct kiocb a bit. Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Reviewed-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-08audit: vfs: fix audit_inode call in O_CREAT case of do_lastJeff Layton1-1/+1
Jiri reported a regression in auditing of open(..., O_CREAT) syscalls. In older kernels, creating a file with open(..., O_CREAT) created audit_name records that looked like this: type=PATH msg=audit(1360255720.628:64): item=1 name="/abc/foo" inode=138810 dev=fd:00 mode=0100640 ouid=0 ogid=0 rdev=00:00 obj=unconfined_u:object_r:default_t:s0 type=PATH msg=audit(1360255720.628:64): item=0 name="/abc/" inode=138635 dev=fd:00 mode=040750 ouid=0 ogid=0 rdev=00:00 obj=unconfined_u:object_r:default_t:s0 ...in recent kernels though, they look like this: type=PATH msg=audit(1360255402.886:12574): item=2 name=(null) inode=264599 dev=fd:00 mode=0100640 ouid=0 ogid=0 rdev=00:00 obj=unconfined_u:object_r:default_t:s0 type=PATH msg=audit(1360255402.886:12574): item=1 name=(null) inode=264598 dev=fd:00 mode=040750 ouid=0 ogid=0 rdev=00:00 obj=unconfined_u:object_r:default_t:s0 type=PATH msg=audit(1360255402.886:12574): item=0 name="/abc/foo" inode=264598 dev=fd:00 mode=040750 ouid=0 ogid=0 rdev=00:00 obj=unconfined_u:object_r:default_t:s0 Richard bisected to determine that the problems started with commit bfcec708, but the log messages have changed with some later audit-related patches. The problem is that this audit_inode call is passing in the parent of the dentry being opened, but audit_inode is being called with the parent flag false. This causes later audit_inode and audit_inode_child calls to match the wrong entry in the audit_names list. This patch simply sets the flag to properly indicate that this inode represents the parent. With this, the audit_names entries are back to looking like they did before. Cc: <stable@vger.kernel.org> # v3.7+ Reported-by: Jiri Jaburek <jjaburek@redhat.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Test By: Richard Guy Briggs <rbriggs@redhat.com> Signed-off-by: Eric Paris <eparis@redhat.com>
2013-05-08aio: give shared kioctx fields their own cachelinesKent Overstreet1-12/+15
[akpm@linux-foundation.org: make reqs_active __cacheline_aligned_in_smp] Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Reviewed-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-08aio: kill struct aio_ring_infoKent Overstreet1-81/+74
struct aio_ring_info was kind of odd, the only place it's used is where it's embedded in struct kioctx - there's no real need for it. The next patch rearranges struct kioctx and puts various things on their own cachelines - getting rid of struct aio_ring_info now makes that reordering a bit clearer. Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Reviewed-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-08aio: kill batch allocationKent Overstreet1-101/+15
Previously, allocating a kiocb required touching quite a few global (well, per kioctx) cachelines... so batching up allocation to amortize those was worthwhile. But we've gotten rid of some of those, and in another couple of patches kiocb allocation won't require writing to any shared cachelines, so that means we can just rip this code out. Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Reviewed-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-08aio: change reqs_active to include unreaped completionsKent Overstreet1-15/+32
The aio code tries really hard to avoid having to deal with the completion ringbuffer overflowing. To do that, it has to keep track of the number of outstanding kiocbs, and the number of completions currently in the ringbuffer - and it's got to check that every time we allocate a kiocb. Ouch. But - we can improve this quite a bit if we just change reqs_active to mean "number of outstanding requests and unreaped completions" - that means kiocb allocation doesn't have to look at the ringbuffer, which is a fairly significant win. Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-08aio: use cancellation list lazilyKent Overstreet1-44/+62
Cancelling kiocbs requires adding them to a per kioctx linked list, which is one of the few things we need to take the kioctx lock for in the fast path. But most kiocbs can't be cancelled - so if we just do this lazily, we can avoid quite a bit of locking overhead. While we're at it, instead of using a flag bit switch to using ki_cancel itself to indicate that a kiocb has been cancelled/completed. This lets us get rid of ki_flags entirely. [akpm@linux-foundation.org: remove buggy BUG()] Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Reviewed-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-08aio: use flush_dcache_page()Kent Overstreet1-28/+17
This wasn't causing problems before because it's not needed on x86, but it is needed on other architectures. Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-08aio: make aio_read_evt() more efficient, convert to hrtimersKent Overstreet1-150/+90
Previously, aio_read_event() pulled a single completion off the ringbuffer at a time, locking and unlocking each time. Change it to pull off as many events as it can at a time, and copy them directly to userspace. This also fixes a bug where if copying the event to userspace failed, we'd lose the event. Also convert it to wait_event_interruptible_hrtimeout(), which simplifies it quite a bit. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Reviewed-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-08aio: refcounting cleanupKent Overstreet1-153/+119
The usage of ctx->dead was fubar - it makes no sense to explicitly check it all over the place, especially when we're already using RCU. Now, ctx->dead only indicates whether we've dropped the initial refcount. The new teardown sequence is: set ctx->dead hlist_del_rcu(); synchronize_rcu(); Now we know no system calls can take a new ref, and it's safe to drop the initial ref: put_ioctx(); We also need to ensure there are no more outstanding kiocbs. This was done incorrectly - it was being done in kill_ctx(), and before dropping the initial refcount. At this point, other syscalls may still be submitting kiocbs! Now, we cancel and wait for outstanding kiocbs in free_ioctx(), after kioctx->users has dropped to 0 and we know no more iocbs could be submitted. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Reviewed-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-08aio: make aio_put_req() locklessKent Overstreet1-52/+34
Freeing a kiocb needed to touch the kioctx for three things: * Pull it off the reqs_active list * Decrementing reqs_active * Issuing a wakeup, if the kioctx was in the process of being freed. This patch moves these to aio_complete(), for a couple reasons: * aio_complete() already has to issue the wakeup, so if we drop the kioctx refcount before aio_complete does its wakeup we don't have to do it twice. * aio_complete currently has to take the kioctx lock, so it makes sense for it to pull the kiocb off the reqs_active list too. * A later patch is going to change reqs_active to include unreaped completions - this will mean allocating a kiocb doesn't have to look at the ringbuffer. So taking the decrement of reqs_active out of kiocb_free() is useful prep work for that patch. This doesn't really affect cancellation, since existing (usb) code that implements a cancel function still calls aio_complete() - we just have to make sure that aio_complete does the necessary teardown for cancelled kiocbs. It does affect code paths where we free kiocbs that were never submitted; they need to decrement reqs_active and pull the kiocb off the reqs_active list. This occurs in two places: kiocb_batch_free(), which is going away in a later patch, and the error path in io_submit_one. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Acked-by: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Reviewed-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-08aio: do fget() after aio_get_req()Kent Overstreet1-13/+9
aio_get_req() will fail if we have the maximum number of requests outstanding, which depending on the application may not be uncommon. So avoid doing an unnecessary fget(). Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Acked-by: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Reviewed-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-08aio: dprintk() -> pr_debug()Kent Overstreet1-33/+24
Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Acked-by: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-08aio: move private stuff out of aio.hKent Overstreet1-0/+61
Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Acked-by: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-08aio: add kiocb_cancel()Kent Overstreet1-36/+43
Minor refactoring, to get rid of some duplicated code [akpm@linux-foundation.org: fix warning] Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Acked-by: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Reviewed-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-08aio: kill return value of aio_complete()Kent Overstreet1-14/+7
Nothing used the return value, and it probably wasn't possible to use it safely for the locked versions (aio_complete(), aio_put_req()). Just kill it. Signed-off-by: Kent Overstreet <koverstreet@google.com> Acked-by: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Acked-by: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Reviewed-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-27 01:00:10 +0300