BMC/Intel-BMC/linux.git/fs/f2fs/gc.c, branch dev

f2fs: call set_page_dirty to attach i_wb for cgroup

2015-07-25T15:54:26+00:00

The cgroup attaches inode->i_wb via mark_inode_dirty and when set_page_writeback is called, __inc_wb_stat() updates i_wb's stat. So, we need to explicitly call set_page_dirty->__mark_inode_dirty in prior to any writebacking pages. This patch should resolve the following kernel panic reported by Andreas Reis. https://bugzilla.kernel.org/show_bug.cgi?id=101801 --- Comment #2 from Andreas Reis --- BUG: unable to handle kernel NULL pointer dereference at 00000000000000a8 IP: [] __percpu_counter_add+0x1a/0x90 PGD 2951ff067 PUD 2df43f067 PMD 0 Oops: 0000 [#1] PREEMPT SMP Modules linked in: CPU: 7 PID: 10356 Comm: gcc Tainted: G W 4.2.0-1-cu #1 Hardware name: Gigabyte Technology Co., Ltd. G1.Sniper M5/G1.Sniper M5, BIOS T01 02/03/2015 task: ffff880295044f80 ti: ffff880295140000 task.ti: ffff880295140000 RIP: 0010:[] [] __percpu_counter_add+0x1a/0x90 RSP: 0018:ffff880295143ac8 EFLAGS: 00010082 RAX: 0000000000000003 RBX: ffffea000a526d40 RCX: 0000000000000001 RDX: 0000000000000020 RSI: 0000000000000001 RDI: 0000000000000088 RBP: ffff880295143ae8 R08: 0000000000000000 R09: ffff88008f69bb30 R10: 00000000fffffffa R11: 0000000000000000 R12: 0000000000000088 R13: 0000000000000001 R14: ffff88041d099000 R15: ffff880084a205d0 FS: 00007f8549374700(0000) GS:ffff88042f3c0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000000a8 CR3: 000000033e1d5000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: 0000000000000000 ffffea000a526d40 ffff880084a20738 ffff880084a20750 ffff880295143b48 ffffffff811cc91e ffff880000000000 0000000000000296 0000000000000000 ffff880417090198 0000000000000000 ffffea000a526d40 Call Trace: [] __test_set_page_writeback+0xde/0x1d0 [] do_write_data_page+0xe7/0x3a0 [] gc_data_segment+0x5aa/0x640 [] do_garbage_collect+0x138/0x150 [] f2fs_gc+0x1be/0x3e0 [] f2fs_balance_fs+0x81/0x90 [] f2fs_unlink+0x47/0x1d0 [] vfs_unlink+0x109/0x1b0 [] do_unlinkat+0x287/0x2c0 [] SyS_unlink+0x16/0x20 [] entry_SYSCALL_64_fastpath+0x12/0x71 Code: 41 5e 5d c3 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 55 49 89 f5 41 54 49 89 fc 53 48 83 ec 08 65 ff 05 e6 d9 b6 7e <48> 8b 47 20 48 63 ca 65 8b 18 48 63 db 48 01 f3 48 39 cb 7d 0a RIP [] __percpu_counter_add+0x1a/0x90 RSP CR2: 00000000000000a8 ---[ end trace 5132449a58ed93a3 ]--- note: gcc[10356] exited with preempt_count 2 Signed-off-by: Jaegeuk Kim

f2fs: handle error cases in move_encrypted_block

2015-07-25T15:54:25+00:00

This patch fixes some missing error handlers. Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: fix a deadlock for summary page lock vs. sentry_lock

2015-06-01T23:21:09+00:00

In f2fs_gc: In f2fs_replace_block: - lock_page(sum_page) - check_valid_map() - mutex_lock(sentry_lock) - mutex_lock(sentry_lock) - change_curseg() - lock_page(sum_page) This patch fixes the deadlock condition. Signed-off-by: Jaegeuk Kim

f2fs crypto: add encryption support in read/write paths

2015-05-28T22:41:52+00:00

This patch adds encryption support in read and write paths. Note that, in f2fs, we need to consider cleaning operation. In cleaning procedure, we must avoid encrypting and decrypting written blocks. So, this patch implements move_encrypted_block(). Signed-off-by: Jaegeuk Kim

f2fs: split find_data_page according to specific purposes

2015-05-28T22:41:37+00:00

This patch splits find_data_page as follows. 1. f2fs_gc - use get_read_data_page() with read only 2. find_in_level - use find_data_page without locked page 3. truncate_partial_page - In the case cache_only mode, just drop cached page. - Ohterwise, use get_lock_data_page() and guarantee to truncate Signed-off-by: Jaegeuk Kim

f2fs: move get_page for gc victims

2015-05-28T22:41:33+00:00

This patch moves getting victim page into move_data_page. Signed-off-by: Jaegeuk Kim

f2fs: add sbi and page pointer in f2fs_io_info

2015-05-28T22:41:32+00:00

This patch adds f2fs_sb_info and page pointers in f2fs_io_info structure. With this change, we can reduce a lot of parameters for IO functions. Signed-off-by: Jaegeuk Kim

f2fs: add stat info for moved blocks by background gc

2015-04-10T22:08:32+00:00

This patch is for looking into gc performance of f2fs in detail. Signed-off-by: Changman Lee [Jaegeuk Kim: fix build errors] Signed-off-by: Jaegeuk Kim

f2fs: split UMOUNT and FASTBOOT flags

2015-02-12T01:04:41+00:00

This patch adds FASTBOOT flag into checkpoint as follows. - CP_UMOUNT_FLAG is set when system is umounted. - CP_FASTBOOT_FLAG is set when intermediate checkpoint having node summaries was done. So, if you get CP_UMOUNT_FLAG from checkpoint, the system was umounted cleanly. Instead, if there was sudden-power-off, you can get CP_FASTBOOT_FLAG or nothing. Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: clean up {in,de}create_sleep_time

2015-02-12T01:04:37+00:00

Use pointer parameter @wait to pass result in {in,de}create_sleep_time for cleanup. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim