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Date:   Tue, 2 Oct 2018 14:50:22 +0000
From:   Christopher Lameter <cl@linux.com>
To:     Matthew Wilcox <willy@infradead.org>
cc:     Greg KH <gregkh@linux-foundation.org>,
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        linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [STABLE PATCH] slub: make ->cpu_partial unsigned int
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On Sun, 30 Sep 2018, Matthew Wilcox wrote:

> > And the patch in mainline has Christoph's ack...
>
> I'm not saying there's a problem with the patch.  It's that the rationale
> for backporting doesn't make any damned sense.  There's something going
> on that nobody understands.  This patch is probably masking an underlying
> problem that will pop back up and bite us again someday.

Right. That is why I raised the issue. I do not see any harm in
backporting but I do not think it fixes the real issue which may be in
concurrent use of page struct fields that are overlapping.