linux-kernel - Re: [PATCH] writeback: fix range_cyclic writeback vs writepages deadlock

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Message-Id: <20181005124640.3de2ba9dec8c713ee8cf286b@linux-foundation.org>
Date:   Fri, 5 Oct 2018 12:46:40 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Dave Chinner <david@...morbit.com>
Cc:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-xfs@...r.kernel.org
Subject: Re: [PATCH] writeback: fix range_cyclic writeback vs writepages
 deadlock

On Fri,  5 Oct 2018 15:45:26 +1000 Dave Chinner <david@...morbit.com> wrote:

> From: Dave Chinner <dchinner@...hat.com>
> 
> We've recently seen a workload on XFS filesystems with a repeatable
> deadlock between background writeback and a multi-process
> application doing concurrent writes and fsyncs to a small range of a
> file.
> 
> ...
> 
> Signed-off-by: Dave Chinner <dchinner@...hat.com>
> Reviewed-by: Jan Kara <jack@...e.de>

Not a serious enough problem for a -stable backport?