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Date: Mon, 2 Jun 2003 18:20:39 -0700
From: Andrew Morton <akpm@digeo.com>
To: Con Kolivas <kernel@kolivas.org>
Cc: linux-kernel@vger.kernel.org, axboe@suse.de
Subject: Re: CFQ - 2.5.70-mm3 BUGs
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Con Kolivas <kernel@kolivas.org> wrote:
>
> I thought I'd give the cfq another run since some change has made it into this 
> patch and got these BUGs together (note, preempt enabled and UP +IDE):
> 
> ------------[ cut here ]------------
> kernel BUG at drivers/block/ll_rw_blk.c:1580!
> invalid operand: 0000 [#1]
> PREEMPT
> CPU:    0
> EIP:    0060:[<40257ff5>]    Not tainted VLI
> EFLAGS: 00010097
> EIP is at __blk_put_request+0x5d/0x108

That's

	BUG_ON(!list_empty(&req->queuelist));

I'm not aware of anyone testing CFQ much at present.