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| author | Jaegeuk Kim | 2014-03-03 03:28:40 +0100 |
|---|---|---|
| committer | Jaegeuk Kim | 2014-03-03 03:28:40 +0100 |
| commit | c81bf1c84f6924678d088d68e131ff1f4d2d9002 (patch) | |
| tree | 0cc16f1a1baa738e97fab5df5f3607a92a4f6cba /fs/f2fs | |
| parent | f2fs: fix dirty page accounting when redirty (diff) | |
| download | kernel-qcow2-linux-c81bf1c84f6924678d088d68e131ff1f4d2d9002.tar.gz kernel-qcow2-linux-c81bf1c84f6924678d088d68e131ff1f4d2d9002.tar.xz kernel-qcow2-linux-c81bf1c84f6924678d088d68e131ff1f4d2d9002.zip | |
f2fs: fix to write node pages with WRITE_SYNC
This patch fixes performance regression of dbench reported by
Alex <hbx7d@yandex.com>.
This issue was revealed by Phoronix tests results:
http://www.phoronix.com/scan.php?page=article&item=linux_314_ssdfs&num=2
It turns out that we need to assign WRITE_SYNC to the node writes, if
fsync is triggered.
The performance numbers are like below, which is measured by Alex.
1. 355MB/s ext4
2. 225MB/s f2fs : WRITE for node writes
3. 525MB/s f2fs : WRITE_SYNC for node writes
Reported-And-Tested-by: Alex <hbx7d@yandex.com>.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/file.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 00f937ec4794..a4cc1d6bdd84 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -115,7 +115,7 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) int ret = 0; bool need_cp = false; struct writeback_control wbc = { - .sync_mode = WB_SYNC_NONE, + .sync_mode = WB_SYNC_ALL, .nr_to_write = LONG_MAX, .for_reclaim = 0, }; |