From: Linus Torvalds <torvalds@linux-foundation.org>
To: Davidlohr Bueso <davidlohr@hp.com>
Cc: Hugh Dickins <hughd@google.com>,
"Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>,
Linux MM <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Rik van Riel <riel@redhat.com>,
Michel Lespinasse <walken@google.com>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>
Subject: Re: [BUG] kernel BUG at mm/vmacache.c:85!
Date: Mon, 28 Apr 2014 15:25:55 -0700 [thread overview]
Message-ID: <CA+55aFwGjYS7PqsD6A-q+Yp9YZmiM6mB4MUYmfR7ro02poxxCQ@mail.gmail.com> (raw)
In-Reply-To: <1398723290.25549.20.camel@buesod1.americas.hpqcorp.net>
On Mon, Apr 28, 2014 at 3:14 PM, Davidlohr Bueso <davidlohr@hp.com> wrote:
>
> I think that returning some stale/bogus vma is causing those segfaults
> in udev. It shouldn't occur in a normal scenario. What puzzles me is
> that it's not always reproducible. This makes me wonder what else is
> going on...
I've replaced the BUG_ON() with a WARN_ON_ONCE(), and made it be
unconditional (so you don't have to trigger the range check).
That might make it show up earlier and easier (and hopefully closer to
the place that causes it). Maybe that makes it easier for Srivatsa to
reproduce this. It doesn't make *my* machine do anything different,
though.
Srivatsa? It's in current -git.
Linus
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next prev parent reply other threads:[~2014-04-28 22:25 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-28 19:18 Srivatsa S. Bhat
2014-04-28 19:20 ` Srivatsa S. Bhat
2014-04-28 21:20 ` Linus Torvalds
2014-04-28 21:55 ` Linus Torvalds
2014-04-28 22:05 ` Hugh Dickins
2014-04-28 22:14 ` Davidlohr Bueso
2014-04-28 22:25 ` Linus Torvalds [this message]
2014-04-29 9:59 ` Srivatsa S. Bhat
2014-04-30 19:16 ` Srivatsa S. Bhat
2014-04-30 19:18 ` Srivatsa S. Bhat
2014-04-30 19:20 ` Srivatsa S. Bhat
2014-04-30 20:26 ` Linus Torvalds
2014-05-01 3:56 ` Hugh Dickins
2014-04-28 22:39 ` Davidlohr Bueso
2014-04-28 22:58 ` Linus Torvalds
2014-04-28 23:11 ` Andrew Morton
2014-04-28 23:57 ` Linus Torvalds
2014-04-29 0:11 ` Davidlohr Bueso
2014-04-29 10:02 ` Srivatsa S. Bhat
2014-04-29 12:52 ` [PATCH] vmacache: change vmacache_find() to always check ->vm_mm Oleg Nesterov
2014-04-29 13:09 ` Srivatsa S. Bhat
2014-04-29 14:02 ` Oleg Nesterov
2014-04-29 12:40 ` [BUG] kernel BUG at mm/vmacache.c:85! Oleg Nesterov
2014-04-29 8:02 ` Srivatsa S. Bhat
2014-04-29 7:59 ` Srivatsa S. Bhat
2014-04-29 0:00 ` Dave Jones
2014-04-29 8:21 ` Srivatsa S. Bhat
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