From: Chris Mason <mason@suse.com>
Date: Wed, 1 Feb 2006 11:06:49 +0000 (-0800)
Subject: [PATCH] reiserfs: reiserfs hang and performance fix for data=journal mode
X-Git-Tag: v2.6.16-rc2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e0e851cf30f1a9bd2e2a7624e9810378d6a2b072;p=pandora-kernel.git

[PATCH] reiserfs: reiserfs hang and performance fix for data=journal mode

In data=journal mode, reiserfs writepage needs to make sure not to trigger
transactions while being run under PF_MEMALLOC.  This patch makes sure to
redirty the page instead of forcing a transaction start in this case.

Also, calling filemap_fdata* in order to trigger io on the block device can
cause lock inversions on the page lock.  Instead, do simple batching from
flush_commit_list.

Signed-off-by: Chris Mason <mason@suse.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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