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| author | Changman Lee <cm224.lee@samsung.com> | 2013-01-29 13:30:07 +0400 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-02-12 02:15:00 +0400 |
| commit | d6212a5f18c8f9f9cc884070a96e11907711217f (patch) | |
| tree | d1c579ecdeb7c2ffc94bffbe0b51af4d2e3c49f3 /fs/f2fs/gc.c | |
| parent | a2617dc6863b21a8109c199ab533b3dbfe178f27 (diff) | |
| download | linux-d6212a5f18c8f9f9cc884070a96e11907711217f.tar.xz | |
f2fs: add un/freeze_fs into super_operations
This patch supports ioctl FIFREEZE and FITHAW to snapshot filesystem.
Before calling f2fs_freeze, all writers would be suspended and sync_fs
would be completed. So no f2fs has to do something.
Just background gc operation should be skipped due to generate dirty
nodes and data until unfreeze.
Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/gc.c')
| -rw-r--r-- | fs/f2fs/gc.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index c386910dacc5..9b5d0aad5daf 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -44,6 +44,11 @@ static int gc_thread_func(void *data) if (kthread_should_stop()) break; + if (sbi->sb->s_writers.frozen >= SB_FREEZE_WRITE) { + wait_ms = GC_THREAD_MAX_SLEEP_TIME; + continue; + } + f2fs_balance_fs(sbi); if (!test_opt(sbi, BG_GC)) |