From: Jin Xu <jinuxstyle@gmail.com>
Date: Thu, 15 Aug 2013 11:17:01 +0000 (+0800)
Subject: f2fs: avoid writing inode redundantly when creating a file
X-Git-Tag: v3.12-rc1~127^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=92c4342fb72a6baf9ee9fcd079b46ed0286ebe33;p=pandora-kernel.git

f2fs: avoid writing inode redundantly when creating a file

In f2fs_write_inode, updating inode after f2fs_balance_fs is not
a optimized way in the case that f2fs_gc is performed ahead. The
inode page will be unnecessarily written out twice, one of which
is in f2fs_gc->...->sync_node_pages and the other is in
update_inode_page.

Let's update the inode page in prior to f2fs_balance_fs to avoid
this.

To reproduce it,
$ touch file (before this step, should make the device need f2fs_gc)
$ sync (or wait the bdi to write dirty inode)

Signed-off-by: Jin Xu <jinuxstyle@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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