linux-kernel - Re: [PATCH] mm: workingset: fix NULL ptr dereference

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Message-ID: <20180409135104.GA23434@infradead.org>
Date:   Mon, 9 Apr 2018 06:51:04 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     Michal Hocko <mhocko@...nel.org>, Chao Yu <yuchao0@...wei.com>,
        Minchan Kim <minchan@...nel.org>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        Christopher Lameter <cl@...ux.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-mm <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Johannes Weiner <hannes@...xchg.org>, Jan Kara <jack@...e.cz>,
        Chris Fries <cfries@...gle.com>,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] mm: workingset: fix NULL ptr dereference

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