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From: Ingo Molnar on 30 Jun 2010 03:50

* tip-bot for Christoph Hellwig <hch(a)lst.de> wrote:

> Commit-ID: 7974891db234467eaf1fec613ec0129cb4ac2332
> Gitweb: http://git.kernel.org/tip/7974891db234467eaf1fec613ec0129cb4ac2332
> Author: Christoph Hellwig <hch(a)lst.de>
> AuthorDate: Mon, 28 Jun 2010 14:15:54 +0200
> Committer: Thomas Gleixner <tglx(a)linutronix.de>
> CommitDate: Tue, 29 Jun 2010 12:12:59 +0200
>
> x86: Always use irq stacks

This commit is causing the following bootup crash in -tip testing:

async_continuing @ 1 after 0 usec
EXT3-fs (sda1): recovery required on readonly filesystem
EXT3-fs (sda1): write access will be enabled during recovery
EXT3-fs: barriers not enabled
BUG: unable to handle kernel NULL pointer dereference at 0000039c
IP: [<c102d4a6>] print_context_stack+0x86/0x130
*pde = 00000000
Oops: 0000 [#1]
last sysfs file:

Pid: 0, comm: swapper Not tainted 2.6.35-rc3-tip-01298-g53cd4ef-dirty #13969 A8N-E/System Product Name
EIP: 0060:[<c102d4a6>] EFLAGS: 00010002 CPU: 0
EIP is at print_context_stack+0x86/0x130
EAX: 00000000 EBX: c229cd80 ECX: 00000001 EDX: c229c000
ESI: 00000000 EDI: c1e74d9c EBP: c229cd4c ESP: c229cd28
DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
Process swapper (pid: 0, ti=c229c000 task=c22a1180 task.ti=c2296000)
Stack:
c10349df c229dffc c229cd94 ffffe000 c229c000 c229cd94 c229cd68 c1e74d9c
<0> c229c000 c229cd7c c102c0ff c1e74d9c f72aa150 00000000 c229cd6c c229cd6c
<0> c2cd6fa0 00000000 f72aa150 f72aa120 f72aa174 c229cd94 c10349df c229cd7c
Call Trace:
[<c10349df>] ? save_stack_trace+0x2f/0x50
BUG: unable to handle kernel NULL pointer dereference at 0000039c
IP: [<c102d4a6>] print_context_stack+0x86/0x130
*pde = 00000000
Oops: 0000 [#2]

Reverting 7974891db2 and dcfa72628 makes the crash go away.

Full crashlog and config attached.

Ingo
From: Christoph Hellwig on 30 Jun 2010 04:00
> Reverting 7974891db2 and dcfa72628 makes the crash go away.
>
> Full crashlog and config attached.

What kernel is the .config for? Trying to compile your x86/irq branch
with it asks lots of questions during make oldconfig for it.

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From: Ingo Molnar on 30 Jun 2010 04:00

* Christoph Hellwig <hch(a)lst.de> wrote:

> > Reverting 7974891db2 and dcfa72628 makes the crash go away.
> >
> > Full crashlog and config attached.
>
> What kernel is the .config for? Trying to compile your x86/irq branch
> with it asks lots of questions during make oldconfig for it.

Just accept the defaults for it.

Thanks,

Ingo
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From: Ingo Molnar on 30 Jun 2010 04:10

* Ingo Molnar <mingo(a)elte.hu> wrote:

>
> * Christoph Hellwig <hch(a)lst.de> wrote:
>
> > > Reverting 7974891db2 and dcfa72628 makes the crash go away.
> > >
> > > Full crashlog and config attached.
> >
> > What kernel is the .config for? Trying to compile your x86/irq branch
> > with it asks lots of questions during make oldconfig for it.
>
> Just accept the defaults for it.

I can see the crash with vanilla x86/irq as well, with the config i sent.

Thanks,

Ingo
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From: Ingo Molnar on 8 Jul 2010 16:50

* Ingo Molnar <mingo(a)elte.hu> wrote:

> * Ingo Molnar <mingo(a)elte.hu> wrote:
>
> >
> > * Christoph Hellwig <hch(a)lst.de> wrote:
> >
> > > > Reverting 7974891db2 and dcfa72628 makes the crash go away.
> > > >
> > > > Full crashlog and config attached.
> > >
> > > What kernel is the .config for? Trying to compile your x86/irq branch
> > > with it asks lots of questions during make oldconfig for it.
> >
> > Just accept the defaults for it.
>
> I can see the crash with vanilla x86/irq as well, with the config i sent.

Ping?

Ingo
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