From: Johannes Weiner <hannes@cmpxchg.org>
To: Andrea Arcangeli <aarcange@redhat.com>
Cc: werner <w.landgraf@ru.ru>, Borislav Petkov <bp@amd64.org>,
Ilya Dryomov <idryomov@gmail.com>, linux-mm <linux-mm@kvack.org>,
linux-kernel@vger.kernel.org
Subject: Re: 2.6.38-rc1 problems with khugepaged
Date: Thu, 20 Jan 2011 02:10:26 +0100 [thread overview]
Message-ID: <20110120011026.GJ2232@cmpxchg.org> (raw)
In-Reply-To: <20110120000147.GR9506@random.random>
On Thu, Jan 20, 2011 at 01:01:47AM +0100, Andrea Arcangeli wrote:
> On Wed, Jan 19, 2011 at 10:45:23PM +0100, Johannes Weiner wrote:
> > Hi,
> >
> > On Wed, Jan 19, 2011 at 04:59:54PM +0100, Borislav Petkov wrote:
> > > Adding some more parties to CC.
> > >
> > > On Wed, Jan 19, 2011 at 09:45:25AM -0400, werner wrote:
> > > > ** Help Help Help ***
> > > >
> > > > My computer crashs on booting ... :( :(
> >
> > That sucks!
> >
> > I cross-compiled for 32-bit and was able to match up the disassembly
> > against the code line from your oops report. Apparently the pte was
> > an invalid pointer, and it makes perfect sense: we unmap the highpte
> > _before_ we access the pointer again for __collapse_huge_page_copy().
> >
> > Can you test with this fix applied? It is only compile-tested, I too
> > have no 32-bit installations anymore.
>
> Thanks Johannes, I already sent the same fix a few minutes ago, it is
> also confirmed to work from Ilya in Message-ID:
> <20110119224950.GA3429@kwango.lan.net>
Actually, I sent it half an hour before you ;-) But good to see that
it fixes the problem.
Hannes
WARNING: multiple messages have this Message-ID (diff)
From: Johannes Weiner <hannes@cmpxchg.org>
To: Andrea Arcangeli <aarcange@redhat.com>
Cc: werner <w.landgraf@ru.ru>, Borislav Petkov <bp@amd64.org>,
Ilya Dryomov <idryomov@gmail.com>, linux-mm <linux-mm@kvack.org>,
linux-kernel@vger.kernel.org
Subject: Re: 2.6.38-rc1 problems with khugepaged
Date: Thu, 20 Jan 2011 02:10:26 +0100 [thread overview]
Message-ID: <20110120011026.GJ2232@cmpxchg.org> (raw)
In-Reply-To: <20110120000147.GR9506@random.random>
On Thu, Jan 20, 2011 at 01:01:47AM +0100, Andrea Arcangeli wrote:
> On Wed, Jan 19, 2011 at 10:45:23PM +0100, Johannes Weiner wrote:
> > Hi,
> >
> > On Wed, Jan 19, 2011 at 04:59:54PM +0100, Borislav Petkov wrote:
> > > Adding some more parties to CC.
> > >
> > > On Wed, Jan 19, 2011 at 09:45:25AM -0400, werner wrote:
> > > > ** Help Help Help ***
> > > >
> > > > My computer crashs on booting ... :( :(
> >
> > That sucks!
> >
> > I cross-compiled for 32-bit and was able to match up the disassembly
> > against the code line from your oops report. Apparently the pte was
> > an invalid pointer, and it makes perfect sense: we unmap the highpte
> > _before_ we access the pointer again for __collapse_huge_page_copy().
> >
> > Can you test with this fix applied? It is only compile-tested, I too
> > have no 32-bit installations anymore.
>
> Thanks Johannes, I already sent the same fix a few minutes ago, it is
> also confirmed to work from Ilya in Message-ID:
> <20110119224950.GA3429@kwango.lan.net>
Actually, I sent it half an hour before you ;-) But good to see that
it fixes the problem.
Hannes
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next prev parent reply other threads:[~2011-01-20 1:10 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-19 13:45 2.6.38-rc1 problems with khugepaged werner
2011-01-19 15:59 ` Borislav Petkov
2011-01-19 15:59 ` Borislav Petkov
2011-01-19 19:55 ` Andrea Arcangeli
2011-01-19 19:55 ` Andrea Arcangeli
2011-01-19 21:45 ` Johannes Weiner
2011-01-19 21:45 ` Johannes Weiner
2011-01-20 0:01 ` Andrea Arcangeli
2011-01-20 0:01 ` Andrea Arcangeli
2011-01-20 1:10 ` Johannes Weiner [this message]
2011-01-20 1:10 ` Johannes Weiner
2011-01-20 1:21 ` Andrea Arcangeli
2011-01-20 1:21 ` Andrea Arcangeli
2011-01-19 22:21 ` Andrea Arcangeli
2011-01-19 22:21 ` Andrea Arcangeli
2011-01-20 20:13 ` Steven Rostedt
2011-01-20 20:13 ` Steven Rostedt
-- strict thread matches above, loose matches on Subject: below --
2011-01-21 8:36 werner
2011-01-21 10:43 werner
2011-01-21 19:17 ` Andrea Arcangeli
2011-01-21 21:14 ` Steven Rostedt
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