From: Qi Yong <qiyong@fc-cn.com>
Date: Tue, 5 Feb 2008 06:29:23 +0000 (-0800)
Subject: skip writing data pages when inode is under I_SYNC
X-Git-Tag: v2.6.25-rc1~932
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2d544564f9954860235db97df2e549a66c61f557;p=pandora-kernel.git

skip writing data pages when inode is under I_SYNC

Since I_SYNC was split out from I_LOCK, the concern in commit
4b89eed93e0fa40a63e3d7b1796ec1337ea7a3aa ("Write back inode data pages
even when the inode itself is locked") is not longer valid.

We should revert to the original behavior: in __writeback_single_inode(),
when we find an I_SYNC-ed inode and we're not doing a data-integrity sync,
skip writing entirely.  Otherwise, we are double calling do_writepages()

Signed-off-by: Qi Yong <qiyong@fc-cn.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Joern Engel <joern@wohnheim.fh-wedel.de>
Cc: WU Fengguang <wfg@mail.ustc.edu.cn>
Cc: Michael Rubin <mrubin@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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