From: Roland Dreier <roland@purestorage.com>
To: Hugh Dickins <hughd@google.com>
Cc: Dave Jones <davej@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Andrea Arcangeli <aarcange@redhat.com>,
David Rientjes <rientjes@google.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
kernel-team@fedoraproject.org
Subject: Re: exit_mmap() BUG_ON triggering since 3.1
Date: Wed, 15 Feb 2012 18:22:27 -0800 [thread overview]
Message-ID: <CAL1RGDVQDr-h5Makto-FXHeHUkK4sJooszciiNvVR66WonQ=6w@mail.gmail.com> (raw)
In-Reply-To: <alpine.LSU.2.00.1202151801020.19691@eggly.anvils>
On Wed, Feb 15, 2012 at 6:14 PM, Hugh Dickins <hughd@google.com> wrote:
> My suspicion was that it would be related to Transparent HugePages:
> they do complicate the pagetable story. And I think I have found a
> potential culprit. I don't know if nr_ptes is the only loser from
> these two split_huge_pages calls, but assuming it is...
Do you have an idea when this bug might have been introduced?
Presumably it's been there since THP came in?
The reason I ask is that I have one of these exit_mm BUG_ONs
in my pile of one-off unreproducible crashes, but in my case it
happened with 2.6.39 (with THP enabled). So I'm wondering if
I can cross it off my list and blame this bug, or if it remains one
of those inexplicable mysteries...
Thanks,
Roland
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next prev parent reply other threads:[~2012-02-16 2:22 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-15 18:33 Dave Jones
2012-02-16 2:14 ` Hugh Dickins
2012-02-16 2:22 ` Roland Dreier [this message]
2012-02-16 2:48 ` Hugh Dickins
2012-02-16 7:07 ` Andrea Arcangeli
2012-02-16 9:53 ` Hugh Dickins
2012-02-16 21:42 ` Andrea Arcangeli
2012-03-02 22:53 ` Hugh Dickins
2012-03-02 22:58 ` Andrew Morton
2012-03-02 23:09 ` Hugh Dickins
2012-03-05 19:59 ` Josh Boyer
2012-03-05 20:07 ` Andrew Morton
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