From: Jaegeuk Kim Date: Mon, 3 Mar 2014 02:28:40 +0000 (+0900) Subject: f2fs: fix to write node pages with WRITE_SYNC X-Git-Tag: v3.15-rc1~62^2~35 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c81bf1c84f6924678d088d68e131ff1f4d2d9002;p=pandora-kernel.git f2fs: fix to write node pages with WRITE_SYNC This patch fixes performance regression of dbench reported by Alex . 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 . Signed-off-by: Jaegeuk Kim --- Reading git-diff-tree failed