linux-kernel - Re: [PATCH] SLUB: Do not fallback to mininum order if __GFP

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Message-ID: <alpine.DEB.2.20.1804181010320.1530@nuc-kabylake>
Date:   Wed, 18 Apr 2018 10:11:06 -0500 (CDT)
From:   Christopher Lameter <cl@...ux.com>
To:     Mikulas Patocka <mpatocka@...hat.com>
cc:     Vlastimil Babka <vbabka@...e.cz>,
        Mike Snitzer <snitzer@...hat.com>,
        Matthew Wilcox <willy@...radead.org>,
        Pekka Enberg <penberg@...nel.org>, linux-mm@...ck.org,
        dm-devel@...hat.com, David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] SLUB: Do not fallback to mininum order if __GFP_NORETRY
 is set

On Wed, 18 Apr 2018, Mikulas Patocka wrote:

> No, this would hit NULL pointer dereference if page is NULL and
> __GFP_NORETRY is set. You want this:

You are right

Acked-by: Christoph Lameter <cl@...ux.com>