On Wed, May 09, 2007 at 01:14:59AM +0100, Ken Moffat wrote:
> On Wed, May 09, 2007 at 01:01:34AM +0200, Andi Kleen wrote:
> >
> > Already known, although it is still unclear what the bug actually is.
> > Can you run with the appended patch please (from Eric Biederman)
> > and post any backtraces the WARN_ON in there spews out?
> >
> > Also do you use swiotlb?
> >
> > Thanks
> >
> > -Andi
> >
> Had to turn off modules to get it to build. It half-logged another
> oops, but no backtraces, and SysRq+r does nothing. Nothing else
> unusual in the log.
Hmm, not good.
>
> May 9 00:47:12 bluesbreaker gconfd (ken-2833): Resolved address
> "xml:readonly:/etc/gnome/gconf/gconf.xml.defaults" to a read-only
> configuration source at position 2
> May 9 00:52:59 bluesbreaker kernel: [ 275.667737] Unable to handle
> kernel paging request at ffff81003b4ac3e8 RIP:
> May 9 00:52:59 bluesbreaker kernel: [ 275.667742]
> [<ffffffff8027134a>] fasync_helper+0x52/0xf0
> May 9 00:52:59 bluesbreaker kernel: [ 275.667749] PGD 8063 PUD
> 9063 PMD 800000003b4a11e3 BAD
> May 9 00:52:59 bluesbreaker kernel: [ 275.667754] Oops: 0009 [1]
> PREEMPT
> May 9 00:54:26 bluesbreaker syslogd 1.4.1: restart.
> May 9 00:54:26 bluesbreaker bootlog: Starting system log daemon...
> [ OK ]
>
> Apparently I do use swiotlb - I didn't know that, and can't see
> where it gets asked in menuconfig, but I can see
> CONFIG_SWIOTLB=y
>
> Let me know if there is anything else I can test (probably pm
> tomorrow), otherwise I'll go back to -head.
Yes testing head would be a good idea. It has a different bug fix
from Linus that is supposed to address this too. Unfortunately it is
still not known why it actually breaks; i had hoped to find that out
using the debugging patch
-Andi
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