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| author |   Jaegeuk Kim <jaegeuk@kernel.org> | 2018-07-25 12:11:56 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-08-20 23:13:42 -0700 |
| commit | 6f8d4455060dfb0e32dfb8e685b97caf4ed1be41 (patch) | |
| tree | a0fad8fa5e8f4efc35784e22f3427e65e751e2e8 /fs/f2fs/f2fs.h | |
| parent | f2fs: fix performance issue observed with multi-thread sequential read (diff) | |
| download | linux-dev-6f8d4455060dfb0e32dfb8e685b97caf4ed1be41.tar.xz linux-dev-6f8d4455060dfb0e32dfb8e685b97caf4ed1be41.zip | |
f2fs: avoid fi->i_gc_rwsem[WRITE] lock in f2fs_gc
The f2fs_gc() called by f2fs_balance_fs() requires to be called outside of
fi->i_gc_rwsem[WRITE], since f2fs_gc() can try to grab it in a loop.
If it hits the miximum retrials in GC, let's give a chance to release
gc_mutex for a short time in order not to go into live lock in the worst
case.
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/f2fs.h')
| -rw-r--r-- | fs/f2fs/f2fs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 170573f8a04a..96bde026636f 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1243,6 +1243,7 @@ struct f2fs_sb_info { unsigned int gc_mode; /* current GC state */ /* for skip statistic */ unsigned long long skipped_atomic_files[2]; /* FG_GC and BG_GC */ + unsigned long long skipped_gc_rwsem; /* FG_GC only */ /* threshold for gc trials on pinned files */ u64 gc_pin_file_threshold; |