From: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Date: Thu, 20 Mar 2014 10:10:08 +0000 (+0900)
Subject: f2fs: introduce fi->i_sem to protect fi's info
X-Git-Tag: v3.15-rc1~62^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d928bfbfe77aa457b765c19e9db8cd4cc72b3c89;p=pandora-kernel.git

f2fs: introduce fi->i_sem to protect fi's info

This patch introduces fi->i_sem to protect fi's info that includes xattr_ver,
pino, i_nlink.
This enables to remove i_mutex during f2fs_sync_file, resulting in performance
improvement when a number of fsync calls are triggered from many concurrent
threads.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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