linux-kernel - Re: [PATCH] mm: Fix a regression where MS_SNAP_STABLE (stable pages snapshotting) was ignored

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Message-ID: <20130920080637.GV22421@suse.de>
Date:	Fri, 20 Sep 2013 09:06:37 +0100
From:	Mel Gorman <mgorman@...e.de>
To:	"Darrick J. Wong" <darrick.wong@...cle.com>
Cc:	Kent Overstreet <kmo@...erainc.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jens Axboe <axboe@...nel.dk>, Jan Kara <jack@...e.cz>,
	Hannes Reinecke <hare@...e.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: Fix a regression where MS_SNAP_STABLE (stable pages
 snapshotting) was ignored

On Thu, Sep 19, 2013 at 08:06:02PM -0700, Darrick J. Wong wrote:
> The "force" parameter in __blk_queue_bounce was being ignored, which means that
> stable page snapshots are not always happening (on ext3).  This of course
> leads to DIF disks reporting checksum errors, so fix this regression.
> 
> The regression was introduced in commit 6bc454d1 (bounce: Refactor
> __blk_queue_bounce to not use bi_io_vec)
> 
> Reported-by: Mel Gorman <mgorman@...e.de>
> Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>

I have no means of testing it but it looks right and thanks for checking
DIF disks.

Acked-by: Mel Gorman <mgorman@...e.de>

-- 
Mel Gorman
SUSE Labs
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