linux-kernel - Re: 3.0.3 kernel BUG at kernel/timer.c:1035

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Date:	Wed, 07 Sep 2011 20:36:19 +0800
From:	Lin Ming <ming.m.lin@...el.com>
To:	Frank van Maarseveen <frankvm@...nkvm.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: 3.0.3 kernel BUG at kernel/timer.c:1035

On Wed, 2011-09-07 at 18:24 +0800, Frank van Maarseveen wrote:
> On Tue, Sep 06, 2011 at 10:48:38PM +0800, Lin Ming wrote:
> > Does below patch help?
> > 
> > >From a98b874437f871d5ecc3f6fe409b2b474b1f2731 Mon Sep 17 00:00:00 2001
> > From: Lin Ming <ming.m.lin@...el.com>
> > Date: Tue, 6 Sep 2011 22:45:43 +0800
> > Subject: [PATCH] block: delete bdi writeback wakup_timer in blk_cleanup_queue()
> > 
> > Signed-off-by: Lin Ming <ming.m.lin@...el.com>
> > ---
> >  block/blk-core.c |    1 +
> >  1 files changed, 1 insertions(+), 0 deletions(-)
> > 
> > diff --git a/block/blk-core.c b/block/blk-core.c
> > index 90e1ffd..22529a3 100644
> > --- a/block/blk-core.c
> > +++ b/block/blk-core.c
> > @@ -363,6 +363,7 @@ void blk_cleanup_queue(struct request_queue *q)
> >  	blk_sync_queue(q);
> >  
> >  	del_timer_sync(&q->backing_dev_info.laptop_mode_wb_timer);
> > +	del_timer_sync(&q->backing_dev_info.wb.wakeup_timer);
> >  	mutex_lock(&q->sysfs_lock);
> >  	queue_flag_set_unlocked(QUEUE_FLAG_DEAD, q);
> >  	mutex_unlock(&q->sysfs_lock);
> > -- 
> > 1.7.2.3
> > 
> 
> No, bug still present. Stack trace is the same and I double checked that
> it was the new kernel (this time with a lot more debug enabled).

Thanks for test.
I'll try to reproduce this bug.

Lin Ming


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