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2016-11-23f2fs: clean up free nid list operationsJaegeuk Kim1-30/+26
This patch cleans up to use consistent free nid list ops. Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-11-23f2fs: split free nid listChao Yu1-53/+83
During free nid allocation, in order to do preallocation, we will tag free nid entry as allocated one and still leave it in free nid list, for other allocators who want to grab free nids, it needs to traverse the free nid list for lookup. It becomes overhead in scenario of allocating free nid intensively by multithreads. This patch splits free nid list to two list: {free,alloc}_nid_list, to keep free nids and preallocated free nids separately, after that, traverse latency will be gone, besides split nid_cnt for separate statistic. Additionally, introduce __insert_nid_to_list and __remove_nid_from_list for cleanup. Signed-off-by: Chao Yu <yuchao0@huawei.com> [Jaegeuk Kim: modify f2fs_bug_on to avoid needless branches] Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-11-23f2fs: fix sparse warningsEric Biggers1-2/+3
f2fs contained a number of endianness conversion bugs. Also, one function should have been 'static'. Found with sparse by running 'make C=2 CF=-D__CHECK_ENDIAN__ fs/f2fs/' Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-11-23f2fs: fix error handling in fsync_node_pagesChao Yu1-2/+3
In fsync_node_pages, if f2fs was taged with CP_ERROR_FLAG, make sure bio cache was flushed before return. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-11-23f2fs: give a chance to detach from dirty listChao Yu1-0/+1
If there is no dirty pages in inode, we should give a chance to detach the inode from global dirty list, otherwise it needs to call another unnecessary .writepages for detaching. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-11-23f2fs: exclude free nids building and allocationChao Yu1-3/+8
During nid allocation, it needs to exclude building and allocating flow of free nids, this is because while building free nid cache, there are two steps: a) load free nids from unused nat entries in NAT pages, b) update free nid cache by checking nat journal. The two steps should be atomical, otherwise an used nid can be allocated as free one after a) and before b). This patch adds missing lock which covers build_free_nids in unlock_operation and f2fs_balance_fs_bg to avoid that. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-11-02writeback: add wbc_to_write_flags()Jens Axboe1-1/+1
Add wbc_to_write_flags(), which returns the write modifier flags to use, based on a struct writeback_control. No functional changes in this patch, but it prepares us for factoring other wbc fields for write type. Signed-off-by: Jens Axboe <axboe@fb.com> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Christoph Hellwig <hch@lst.de>
2016-11-01block,fs: use REQ_* flags directlyChristoph Hellwig1-2/+2
Remove the WRITE_* and READ_SYNC wrappers, and just use the flags directly. Where applicable this also drops usage of the bio_set_op_attrs wrapper. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-10-10Merge branch 'work.misc' of ↵Linus Torvalds1-5/+2
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull misc vfs updates from Al Viro: "Assorted misc bits and pieces. There are several single-topic branches left after this (rename2 series from Miklos, current_time series from Deepa Dinamani, xattr series from Andreas, uaccess stuff from from me) and I'd prefer to send those separately" * 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (39 commits) proc: switch auxv to use of __mem_open() hpfs: support FIEMAP cifs: get rid of unused arguments of CIFSSMBWrite() posix_acl: uapi header split posix_acl: xattr representation cleanups fs/aio.c: eliminate redundant loads in put_aio_ring_file fs/internal.h: add const to ns_dentry_operations declaration compat: remove compat_printk() fs/buffer.c: make __getblk_slow() static proc: unsigned file descriptors fs/file: more unsigned file descriptors fs: compat: remove redundant check of nr_segs cachefiles: Fix attempt to read i_blocks after deleting file [ver #2] cifs: don't use memcpy() to copy struct iov_iter get rid of separate multipage fault-in primitives fs: Avoid premature clearing of capabilities fs: Give dentry to inode_change_ok() instead of inode fuse: Propagate dentry down to inode_change_ok() ceph: Propagate dentry down to inode_change_ok() xfs: Propagate dentry down to inode_change_ok() ...
2016-10-01f2fs: fix to commit bio cache after flushing node pagesChao Yu1-2/+16
In sync_node_pages, we won't check and commit last merged pages in private bio cache of f2fs, as these pages were taged as writeback, someone who is waiting for writebacking of the page will be blocked until the cache was committed by someone else. We need to commit node type bio cache to avoid potential deadlock or long delay of waiting writeback. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-10-01f2fs: support configuring fault injection per superblockChao Yu1-1/+1
Previously, we only support global fault injection configuration, so that when we configure type/rate of fault injection through sysfs, mount option, it will influence all f2fs partition which is being used. It is not make sence, since it will be not convenient if developer want to test separated partitions with different fault injection rate/type simultaneously, also it's not possible to enable fault injection in one partition and disable fault injection in other one. >From now on, we move global configuration of fault injection in module into per-superblock, hence injection testing can be more flexible. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-10-01f2fs: add customized migrate_page callbackWeichao Guo1-0/+3
This patch improves the migration of dirty pages and allows migrating atomic written pages that F2FS uses in Page Cache. Instead of the fallback releasing page path, it provides better performance for memory compaction, CMA and other users of memory page migrating. For dirty pages, there is no need to write back first when migrating. For an atomic written page before committing, we can migrate the page and update the related 'inmem_pages' list at the same time. Signed-off-by: Weichao Guo <guoweichao@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> [Jaegeuk Kim: fix some coding style] Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-09-16f2fs: use filemap_check_errors()Miklos Szeredi1-5/+2
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: Jaegeuk Kim <jaegeuk@kernel.org>
2016-09-13f2fs: avoid ENOMEM during roll-forward recoveryJaegeuk Kim1-3/+5
This patch gives another chances during roll-forward recovery regarding to -ENOMEM. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-08-30f2fs: remove redundant judgement condition in available_free_memoryChao Yu1-2/+0
In available_free_memory, there are two same judgement conditions which is used for checking NAT excess, remove one of them. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-08-19Revert "f2fs: use percpu_rw_semaphore"Jaegeuk Kim1-24/+23
LKP reported -36.3% regression of fsmark.files_per_sec due to this patch. I've confirmed that fxmark [1] has also slight regression for DWAL. [1] https://github.com/sslab-gatech/fxmark This reverts commit ec795418c41850056feb956534edf059dc1155d4.
2016-07-27Merge tag 'for-f2fs-4.8' of ↵Linus Torvalds1-73/+71
git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs updates from Jaegeuk Kim: "The major change in this version is mitigating cpu overheads on write paths by replacing redundant inode page updates with mark_inode_dirty calls. And we tried to reduce lock contentions as well to improve filesystem scalability. Other feature is setting F2FS automatically when detecting host-managed SMR. Enhancements: - ioctl to move a range of data between files - inject orphan inode errors - avoid flush commands congestion - support lazytime Bug fixes: - return proper results for some dentry operations - fix deadlock in add_link failure - disable extent_cache for fcollapse/finsert" * tag 'for-f2fs-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (68 commits) f2fs: clean up coding style and redundancy f2fs: get victim segment again after new cp f2fs: handle error case with f2fs_bug_on f2fs: avoid data race when deciding checkpoin in f2fs_sync_file f2fs: support an ioctl to move a range of data blocks f2fs: fix to report error number of f2fs_find_entry f2fs: avoid memory allocation failure due to a long length f2fs: reset default idle interval value f2fs: use blk_plug in all the possible paths f2fs: fix to avoid data update racing between GC and DIO f2fs: add maximum prefree segments f2fs: disable extent_cache for fcollapse/finsert inodes f2fs: refactor __exchange_data_block for speed up f2fs: fix ERR_PTR returned by bio f2fs: avoid mark_inode_dirty f2fs: move i_size_write in f2fs_write_end f2fs: fix to avoid redundant discard during fstrim f2fs: avoid mismatching block range for discard f2fs: fix incorrect f_bfree calculation in ->statfs f2fs: use percpu_rw_semaphore ...
2016-07-21block: get rid of bio_rw and READAChristoph Hellwig1-1/+1
These two are confusing leftover of the old world order, combining values of the REQ_OP_ and REQ_ namespaces. For callers that don't special case we mostly just replace bi_rw with bio_data_dir or op_is_write, except for the few cases where a switch over the REQ_OP_ values makes more sense. Any check for READA is replaced with an explicit check for REQ_RAHEAD. Also remove the READA alias for REQ_RAHEAD. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Mike Christie <mchristi@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-07-16f2fs: use blk_plug in all the possible pathsJaegeuk Kim1-0/+3
This patch reverts 19a5f5e2ef37 (f2fs: drop any block plugging), and adds blk_plug in write paths additionally. The main reason is that blk_start_plug can be used to wake up from low-power mode before submitting further bios. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-07-16f2fs: refactor __exchange_data_block for speed upJaegeuk Kim1-0/+1
This reduces the elapsed time to do xfstests/generic/017. Before: 715 s After: 458 s Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-07-08f2fs: use percpu_rw_semaphoreJaegeuk Kim1-23/+24
This patch replaces rw_semaphore with percpu_rw_semaphore for: sbi->cp_rwsem nm_i->nat_tree_lock Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-07-08f2fs: skip to check the block address of node pageJaegeuk Kim1-3/+3
If the node page is up-to-date, it should be alive. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-07-08f2fs: call SetPageUptodate if neededJaegeuk Kim1-3/+6
SetPageUptodate() issues memory barrier, resulting in performance degrdation. Let's avoid that. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-07-08f2fs: introduce f2fs_set_page_dirty_nobufferJaegeuk Kim1-1/+1
This patch adds f2fs_set_page_dirty_nobuffer() copied from __set_page_dirty_buffer. When appending 4KB blocks in f2fs on pmem with multiple cores, this improves the overall performance. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-07-08f2fs: fix to detect truncation prior rather than EIO during readChao Yu1-3/+3
In procedure of synchonized read, after sending out the read request, reader will try to lock the page for waiting device to finish the read jobs and unlock the page, but meanwhile, truncater will race with reader, so after reader get lock of the page, it should check page's mapping to detect whether someone has truncated the page in advance, then reader has the chance to do the retry if truncation was done, otherwise read can be failed due to previous condition check. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-07-06f2fs: produce more nids and reduce readahead natsJaegeuk Kim1-3/+6
The readahead nat pages are more likely to be reclaimed quickly, so it'd better to gather more free nids in advance. And, let's keep some free nids as much as possible. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-06-07f2fs: use bio op accessorsMike Christie1-3/+5
Separate the op from the rq_flag_bits and have f2fs set/get the bio using bio_set_op_attrs/bio_op. Signed-off-by: Mike Christie <mchristi@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-06-07f2fs: control not to exceed # of cached nat entriesJaegeuk Kim1-0/+4
This is to avoid cache entry management overhead including radix tree. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-06-03f2fs: return the errno to the caller to avoid using a wrong pageYunlong Song1-5/+10
Commit aaf9607516ed38825268515ef4d773289a44f429 ("f2fs: check node page contents all the time") pointed out that "sometimes it was reported that its contents was missing", so it checks the page's mapping and contents. When "nid != nid_of_node(page)", ERR_PTR(-EIO) will be returned to the caller. However, commit e1c51b9f1df2f9efc2ec11488717e40cd12015f9 ("f2fs: clean up node page updating flow") moves "nid != nid_of_node(page)" test to "f2fs_bug_on(sbi, nid != nid_of_node(page))", this will return a wrong page to the caller when F2FS_CHECK_FS is off when "sometimes it was reported that its contents was missing" happens. This patch restores to check node page contents all the time, and returns the errno to make the caller known something is wrong and avoid to use the page. This patch also moves f2fs_bug_on to its proper location. Signed-off-by: Yunlong Song <yunlong.song@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-06-03f2fs: avoid unnecessary updating inode during fsyncJaegeuk Kim1-2/+7
If roll-forward recovery can recover i_size, we don't need to update inode's metadata during fsync. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-06-03f2fs: remove syncing inode page in all the casesJaegeuk Kim1-28/+0
This patch reduces to call them across the whole tree. - sync_inode_page() - update_inode_page() - update_inode() - f2fs_write_inode() Instead, checkpoint will flush all the dirty inode metadata before syncing node pages. Note that, this is doable, since we call mark_inode_dirty_sync() for all inode's field change which needs to update on-disk inode as well. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-06-03f2fs: flush inode metadata when checkpoint is doingJaegeuk Kim1-0/+1
This patch registers all the inodes which have dirty metadata to sync when checkpoint is doing. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-06-03f2fs: call mark_inode_dirty_sync for i_field changesJaegeuk Kim1-3/+3
This patch calls mark_inode_dirty_sync() for the following on-disk inode changes. -> largest -> ctime/mtime/atime -> i_current_depth -> i_xattr_nid -> i_pino -> i_advise -> i_flags -> i_mode Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-06-03f2fs: use inode pointer for {set, clear}_inode_flagJaegeuk Kim1-2/+2
This patch refactors to use inode pointer for set_inode_flag and clear_inode_flag. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-21f2fs: fix to update dirty page count correctlyChao Yu1-3/+4
Once we failed to merge inline data into inode page during flushing inline inode, we will skip invoking inode_dec_dirty_pages, which makes dirty page count incorrect, result in panic in ->evict_inode, Fix it. ------------[ cut here ]------------ kernel BUG at /home/yuchao/git/devf2fs/inode.c:336! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 3 PID: 10004 Comm: umount Tainted: G O 4.6.0-rc5+ #17 Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 task: f0c33000 ti: c5212000 task.ti: c5212000 EIP: 0060:[<f89aacb5>] EFLAGS: 00010202 CPU: 3 EIP is at f2fs_evict_inode+0x85/0x490 [f2fs] EAX: 00000001 EBX: c4529ea0 ECX: 00000001 EDX: 00000000 ESI: c0131000 EDI: f89dd0a0 EBP: c5213e9c ESP: c5213e78 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 CR0: 80050033 CR2: b75878c0 CR3: 1a36a700 CR4: 000406f0 Stack: c4529ea0 c4529ef4 c5213e8c c176d45c c4529ef4 00000000 c4529ea0 c4529fac f89dd0a0 c5213eb0 c1204a68 c5213ed8 c452a2b4 c6680930 c5213ec0 c1204b64 c6680d44 c6680620 c5213eec c120588d ee84b000 ee84b5c0 c5214000 ee84b5e0 Call Trace: [<c176d45c>] ? _raw_spin_unlock+0x2c/0x50 [<c1204a68>] evict+0xa8/0x170 [<c1204b64>] dispose_list+0x34/0x50 [<c120588d>] evict_inodes+0x10d/0x130 [<c11ea941>] generic_shutdown_super+0x41/0xe0 [<c1185190>] ? unregister_shrinker+0x40/0x50 [<c1185190>] ? unregister_shrinker+0x40/0x50 [<c11eac52>] kill_block_super+0x22/0x70 [<f89af23e>] kill_f2fs_super+0x1e/0x20 [f2fs] [<c11eae1d>] deactivate_locked_super+0x3d/0x70 [<c11eb383>] deactivate_super+0x43/0x60 [<c1208ec9>] cleanup_mnt+0x39/0x80 [<c1208f50>] __cleanup_mnt+0x10/0x20 [<c107d091>] task_work_run+0x71/0x90 [<c105725a>] exit_to_usermode_loop+0x72/0x9e [<c1001c7c>] do_fast_syscall_32+0x19c/0x1c0 [<c176dd48>] sysenter_past_esp+0x45/0x74 EIP: [<f89aacb5>] f2fs_evict_inode+0x85/0x490 [f2fs] SS:ESP 0068:c5213e78 ---[ end trace d30536330b7fdc58 ]--- Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-07f2fs: read node blocks ahead when truncating blocksJaegeuk Kim1-24/+28
This patch enables reading node blocks in advance when truncating large data blocks. > time rm $MNT/testfile (500GB) after drop_cachees Before : 9.422 s After : 4.821 s Reported-by: Stephen Bates <stephen.bates@microsemi.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-07f2fs: remove an obsolete variableJaegeuk Kim1-3/+0
This patch removes an obsolete variable used in add_free_nid. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-07f2fs: inject ENOSPC failuresJaegeuk Kim1-0/+4
This patch injects ENOSPC failures. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-07f2fs: use f2fs_grab_cache_page instead of grab_cache_pageJaegeuk Kim1-4/+4
This patch converts grab_cache_page to f2fs_grab_cache_page. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-04-28f2fs: move node pages only in victim section during GCChao Yu1-0/+31
For foreground GC, we cache node blocks in victim section and set them dirty, then we call sync_node_pages to flush these node pages, but meanwhile, those node pages which does not locate in victim section will be flushed together, so more bandwidth and continuous free space would be occupied. So for this condition, it's better to leave those unrelated node page in cache for further write hit, and let CP or VM to flush them afterward. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-04-27f2fs: set fsync mark only for the last dnodeJaegeuk Kim1-8/+98
In order to give atomic writes, we should consider power failure during sync_node_pages in fsync. So, this patch marks fsync flag only in the last dnode block. Acked-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-04-27f2fs: report unwritten status in fsync_node_pagesJaegeuk Kim1-7/+6
The fsync_node_pages should return pass or failure so that user could know fsync is completed or not. Acked-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-04-27f2fs: split sync_node_pages with fsync_node_pagesJaegeuk Kim1-29/+79
This patch splits the existing sync_node_pages into (f)sync_node_pages. The fsync_node_pages is used for f2fs_sync_file only. Acked-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-04-27f2fs: avoid needless lock for node pages when fsyncing a fileJaegeuk Kim1-3/+7
When fsync is called, sync_node_pages finds a proper direct node pages to flush. But, it locks unrelated direct node pages together unnecessarily. Acked-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-04-15f2fs: add BUG_ON to avoid unnecessary flowJaegeuk Kim1-5/+2
This patch adds BUG_ON instead of retrying loop. In the case of node pages, we already got this inode page, but unlocked it. By the fact that we don't truncate any node pages in operations, the page's mapping should be unchangeable. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-04-15f2fs: use PGP_LOCK to check its truncationJaegeuk Kim1-7/+2
Previously, after trylock_page is succeeded, it doesn't check its mapping. In order to fix that, we can just give PGP_LOCK to pagecache_get_page. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-04-04mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macrosKirill A. Shutemov1-5/+5
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time ago with promise that one day it will be possible to implement page cache with bigger chunks than PAGE_SIZE. This promise never materialized. And unlikely will. We have many places where PAGE_CACHE_SIZE assumed to be equal to PAGE_SIZE. And it's constant source of confusion on whether PAGE_CACHE_* or PAGE_* constant should be used in a particular case, especially on the border between fs and mm. Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much breakage to be doable. Let's stop pretending that pages in page cache are special. They are not. The changes are pretty straight-forward: - <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN}; - page_cache_get() -> get_page(); - page_cache_release() -> put_page(); This patch contains automated changes generated with coccinelle using script below. For some reason, coccinelle doesn't patch header files. I've called spatch for them manually. The only adjustment after coccinelle is revert of changes to PAGE_CAHCE_ALIGN definition: we are going to drop it later. There are few places in the code where coccinelle didn't reach. I'll fix them manually in a separate patch. Comments and documentation also will be addressed with the separate patch. virtual patch @@ expression E; @@ - E << (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ expression E; @@ - E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ @@ - PAGE_CACHE_SHIFT + PAGE_SHIFT @@ @@ - PAGE_CACHE_SIZE + PAGE_SIZE @@ @@ - PAGE_CACHE_MASK + PAGE_MASK @@ expression E; @@ - PAGE_CACHE_ALIGN(E) + PAGE_ALIGN(E) @@ expression E; @@ - page_cache_get(E) + get_page(E) @@ expression E; @@ - page_cache_release(E) + put_page(E) Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-18f2fs: submit node page write bios when really requiredJaegeuk Kim1-11/+1
If many threads calls fsync with data writes, we don't need to flush every bios having node page writes. The f2fs_wait_on_page_writeback will flush its bios when the page is really needed. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-03-18f2fs: declare static functionsJaegeuk Kim1-2/+2
Just to avoid sparse warnings. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-03-18f2fs: modify the readahead method in ra_node_page()Fan Li1-5/+4
ra_node_page() is used to read ahead one node page. Comparing to regular read, it's faster because it doesn't wait for IO completion. But if it is called twice for reading the same block, and the IO request from the first call hasn't been completed before the second call, the second call will have to wait until the read is over. Here use the code in __do_page_cache_readahead() to solve this problem. It does nothing when someone else already puts the page in mapping. The status of page should be assured by whoever puts it there. This implement also prevents alteration of page reference count. Signed-off-by: Fan li <fanofcode.li@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
generated by cgit v1.2.3 (git 2.39.0) at 2025-09-12 04:12:20 +0300