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Date: Fri, 5 Oct 2018 12:46:40 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Dave Chinner <david@fromorbit.com>
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        linux-xfs@vger.kernel.org
Subject: Re: [PATCH] writeback: fix range_cyclic writeback vs writepages
 deadlock
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On Fri,  5 Oct 2018 15:45:26 +1000 Dave Chinner <david@fromorbit.com> wrote:

> From: Dave Chinner <dchinner@redhat.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@redhat.com>
> Reviewed-by: Jan Kara <jack@suse.de>

Not a serious enough problem for a -stable backport?