linux-kernel - Re: kdump regression compared to v2.6.35

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Message-ID: <1331313838.1541221283181038073.JavaMail.root@zmail06.collab.prod.int.phx2.redhat.com>
Date:	Mon, 30 Aug 2010 11:10:38 -0400 (EDT)
From:	caiqian@...hat.com
To:	Tejun Heo <tj@...nel.org>
Cc:	kexec <kexec@...ts.infradead.org>, linux-next@...r.kernel.org,
	torvalds@...ux-foundation.org,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: kdump regression compared to v2.6.35


----- "Tejun Heo" <tj@...nel.org> wrote:

> On 08/30/2010 04:51 PM, CAI Qian wrote:
> > kintegrityd   R  running task        0    13      2 0x00000008
> >  ffffffffffffff10 ffffffff81078e25 0000000000000010
> 0000000000000206
> >  ffff88046dcf1e40 0000000000000018 ffff88046dc9a440
> ffff88046dc9a440
> >  ffff88088e231f00 ffff88088e239300 ffff88046dcf1ee0
> ffffffff810796e8
> > Call Trace:
> >  [<ffffffff81078e25>] ? worker_maybe_bind_and_lock+0x55/0xf0
> >  [<ffffffff810796e8>] ? rescuer_thread+0x108/0x1d0
> >  [<ffffffff810795e0>] ? rescuer_thread+0x0/0x1d0
> >  [<ffffffff810795e0>] ? rescuer_thread+0x0/0x1d0
> >  [<ffffffff8107fc06>] ? kthread+0x96/0xa0
> >  [<ffffffff8100be84>] ? kernel_thread_helper+0x4/0x10
> >  [<ffffffff8107fb70>] ? kthread+0x0/0xa0
> >  [<ffffffff8100be80>] ? kernel_thread_helper+0x0/0x10
> ...
> > runnable tasks:
> >             task   PID         tree-key  switches  prio    
> exec-runtime         sum-exec        sum-sleep
> >
> ----------------------------------------------------------------------------------------------------------
> >          swapper     1       296.512617        23   120      
> 296.512617       282.090606         0.046441 /
> >      sync_supers    11       293.512617         2   120      
> 293.512617         0.002502      5354.887736 /
> > R    kintegrityd    13      2382.377879         1   100     
> 2382.377879    180846.751167         0.001076 /
> 
> Looks like kintegrityd went bonkers.  Maybe it has some busy wait
> which doesn't quite work well with how cmwq schedules works.  I'll
> look into it.  Can you please attach your .config?
Attached.
> Thanks.
> 
> -- 
> tejun

View attachment "config-2.6.36-rc2-wq+.x86_64" of type "text/x-mpsub" (106089 bytes)