From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH] mm: workingset: fix NULL ptr dereference
Date: Mon, 9 Apr 2018 06:51:04 -0700
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To: Matthew Wilcox <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>, Chao Yu <yuchao0@huawei.com>, Minchan Kim <minchan@kernel.org>, Jaegeuk Kim <jaegeuk@kernel.org>, Christopher Lameter <cl@linux.com>, Andrew Morton <akpm@linux-foundation.org>, linux-mm <linux-mm@kvack.org>, LKML <linux-kernel@vger.kernel.org>, Johannes Weiner <hannes@cmpxchg.org>, Jan Kara <jack@suse.cz>, Chris Fries <cfries@google.com>, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org
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On Mon, Apr 09, 2018 at 06:41:14AM -0700, Matthew Wilcox wrote:
> It's worth noting that this is endemic in filesystems.

For the rationale in XFS take a look at commit ad22c7a043c2cc6792820e6c5da699935933e87d