Re: [PATCH block/for-next] block: don't call blk_drain_queue() ifelevator is not up

[Tejun Heo]

Hello,

On Fri, Nov 4, 2011 at 2:40 AM, Stefan Richter
<stefanr@xxxxxxxxxxxxxxxxx> wrote:
>>       /* @q won't process any more request, flush async actions */
>>       del_timer_sync(&q->backing_dev_info.laptop_mode_wb_timer);
>
> What prevents elevator_attach to be called and requests to be inserted
> between 'if (q-elevator)' and 'blk_put_queue(q)'?

The fact that the queue owner has called blk_cleaup_queue()?

Thanks.

-- 
tejun
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