From: Zdenek Kabelac <zkabelac@redhat.com>
To: chich21@mail.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: Linux kernel 2.6.34.7 lvm error
Date: Mon, 04 Oct 2010 10:46:26 +0200 [thread overview]
Message-ID: <4CA99462.5050707@redhat.com> (raw)
In-Reply-To: <8CD30F86F2A0A2B-BE8-179A8@web-mmc-m02.sysops.aol.com>
Dne 3.10.2010 11:56, chich21@mail.com napsal(a):
> With Linux kernel 2.6.34.7 from www.kernel.org the following error occurs.
>
> Issuing this command produces error.
>
> vgchange -ay
>
> outputs:
> Internal error: Maps lock 14317216 < unlock 14321312
>
> vgchange is part of lvm-tools.
>
> This doesn't happen with kernel 2.6.34 or 2.6.34.1 from www.kernel.org.
>
> Is there a patch for 2.6.34.x series coming for this error. As there is one
> for 2.6.35.x series.
>
> Please CC email me related posts.
Bug is related to stack guard fix - kernel 2.6.36-rc4 has this problem fixed.
Bug is present in 2.6.36-rc3 - so something between them fixes the problem.
It looks like the [stack] mapping loses 1 page after each mlock/munlock cycle.
I'm probably going to play bisect game to find out missing fix.
https://bugzilla.redhat.com/show_bug.cgi?id=638525
Meanwhile lvm tools were also updated to read whole mapping table before
locking pages to avoid reading some mapping lines twice.
Zdenek.
next prev parent reply other threads:[~2010-10-04 8:46 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-03 9:56 Linux kernel 2.6.34.7 lvm error chich21
2010-10-04 8:46 ` Zdenek Kabelac [this message]
2010-10-04 13:07 ` Zdenek Kabelac
2010-10-06 13:29 ` Stefan Bader
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