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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-04-21 10:40:54 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-05-04 14:15:15 -0700 |
| commit | 5463e7c18e51152104aba9614e6abfc039a8b710 (patch) | |
| tree | 218536394f55b575ad56dbe702c2d9dfac078c50 /fs/f2fs/f2fs.h | |
| parent | 5ebe6afaf0057ac3eaeb98defd5456894b446d22 (diff) | |
| download | lwn-5463e7c18e51152104aba9614e6abfc039a8b710.tar.gz lwn-5463e7c18e51152104aba9614e6abfc039a8b710.zip | |
Revert "f2fs: enhance multi-threads performance"
This reports performance regression by Yuanhan Liu.
The basic idea was to reduce one-point mutex, but it turns out this causes
another contention like context swithes.
https://lkml.org/lkml/2015/4/21/11
Until finishing the analysis on this issue, I'd like to revert this for a while.
This reverts commit 78373b7319abdf15050af5b1632c4c8b8b398f33.
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 d8921cf2ba9a..8de34ab6d5b1 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -625,6 +625,7 @@ struct f2fs_sb_info { struct mutex cp_mutex; /* checkpoint procedure lock */ struct rw_semaphore cp_rwsem; /* blocking FS operations */ struct rw_semaphore node_write; /* locking node writes */ + struct mutex writepages; /* mutex for writepages() */ wait_queue_head_t cp_wait; struct inode_management im[MAX_INO_ENTRY]; /* manage inode cache */ |