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Date: Tue, 18 Mar 2008 18:46:58 +0900
From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [2.6.25-rc5-mm1][regression?] BUG: spinlock wrong CPU, modprobe
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Hi Andrew

> > Call Trace:
> >  [<a000000100015f00>] show_stack+0x80/0xa0
> >                                 sp=e00001609262fbd0 bsp=e000016092620fd8
> >  [<a000000100015f50>] dump_stack+0x30/0x60
> >                                 sp=e00001609262fda0 bsp=e000016092620fc0
> >  [<a0000001004674a0>] spin_bug+0x1a0/0x1c0
> >                                 sp=e00001609262fda0 bsp=e000016092620f90
> >  [<a000000100467590>] _raw_spin_unlock+0xd0/0x120
> >                                 sp=e00001609262fda0 bsp=e000016092620f60
> >  [<a00000010082bfe0>] _spin_unlock+0x20/0x40
> >                                 sp=e00001609262fda0 bsp=e000016092620f40
> >  [<a000000100138100>] do_wp_page+0x500/0xfe0
> >                                 sp=e00001609262fda0 bsp=e000016092620ed8
> >  [<a00000010013c560>] handle_mm_fault+0xe80/0x10e0
> >                                 sp=e00001609262fda0 bsp=e000016092620e50
> >  [<a00000010006c140>] ia64_do_page_fault+0x600/0xa40
> >                                 sp=e00001609262fda0 bsp=e000016092620df0
> >  [<a00000010000abe0>] ia64_leave_kernel+0x0/0x270
> >                                 sp=e00001609262fe30 bsp=e000016092620df0
> > 
> 
> I'm unaware of any other reports of anything like this so yes, please do
> bisect it if you have the time.

sorry, my report was uncleared.
I already did bisect and found the bug in git-ia64.patch.
and already reported Tony Luck.

that mail is quote following.

> Hi
> 
> if revert following patch
> 
>     [IA64] Multiple outstanding ptc.g instruction support
> 
> then this problem doesn't reproduce.
> 
> I attached that revert patch.
> Thanks!


Thanks.