f2fs: fix to write node pages with WRITE_SYNC

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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>

...

This commit is contained in:

Jaegeuk Kim 2014-03-03 11:28:40 +09:00

parent 9cf3c3898a

commit c81bf1c84f

1 changed files with 1 additions and 1 deletions

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fs/f2fs/file.c

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