From: Davidlohr Bueso <dave@stgolabs.net>
To: David Rientjes <rientjes@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Luiz Capitulino <lcapitulino@redhat.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [patch] mm, hugetlb: close race when setting PageTail for gigantic pages
Date: Tue, 24 Feb 2015 18:20:24 -0800 [thread overview]
Message-ID: <1424830824.6539.85.camel@stgolabs.net> (raw)
In-Reply-To: <alpine.DEB.2.10.1502241614480.4646@chino.kir.corp.google.com>
On Tue, 2015-02-24 at 16:16 -0800, David Rientjes wrote:
> Now that gigantic pages are dynamically allocatable, care must be taken
> to ensure that p->first_page is valid before setting PageTail.
>
> If this isn't done, then it is possible to race and have compound_head()
> return NULL.
>
> Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Davidlohr Bueso <dave@stgolabs.net>
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next prev parent reply other threads:[~2015-02-25 2:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-25 0:16 David Rientjes
2015-02-25 2:20 ` Davidlohr Bueso [this message]
2015-02-25 2:32 Hillf Danton
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