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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-08-09 17:53:34 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-08-20 23:13:42 -0700 |
| commit | 853137cef46ccc490e6fd4b160a1c252d6459842 (patch) | |
| tree | a2fe0cf5dc9d0bb412fbcd766264ac5d52587558 /fs/f2fs/super.c | |
| parent | dda9f4b9cac6bdd2a96253b4444d7a6ce5132edb (diff) | |
| download | linux-853137cef46ccc490e6fd4b160a1c252d6459842.tar.bz2 | |
f2fs: fix performance issue observed with multi-thread sequential read
This reverts the commit - "b93f771 - f2fs: remove writepages lock"
to fix the drop in sequential read throughput.
Test: ./tiotest -t 32 -d /data/tio_tmp -f 32 -b 524288 -k 1 -k 3 -L
device: UFS
Before -
read throughput: 185 MB/s
total read requests: 85177 (of these ~80000 are 4KB size requests).
total write requests: 2546 (of these ~2208 requests are written in 512KB).
After -
read throughput: 758 MB/s
total read requests: 2417 (of these ~2042 are 512KB reads).
total write requests: 2701 (of these ~2034 requests are written in 512KB).
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/super.c')
| -rw-r--r-- | fs/f2fs/super.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index be41dbd7b261..53d70b64fea1 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -2842,6 +2842,7 @@ try_onemore: /* init f2fs-specific super block info */ sbi->valid_super_block = valid_super_block; mutex_init(&sbi->gc_mutex); + mutex_init(&sbi->writepages); mutex_init(&sbi->cp_mutex); init_rwsem(&sbi->node_write); init_rwsem(&sbi->node_change); |