Re: [PATCH 1/3] blk-mq: unify hctx delayed_run_work and run_work

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On 04/11/2017 12:00 PM, Bart Van Assche wrote:
> On Mon, 2017-04-10 at 09:54 -0600, Jens Axboe wrote:
>>  void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx)
>>  {
>> -	cancel_work(&hctx->run_work);
>> +	cancel_delayed_work(&hctx->run_work);
>>  	cancel_delayed_work(&hctx->delay_work);
>>  	set_bit(BLK_MQ_S_STOPPED, &hctx->state);
>>  }
> 
> Hello Jens,
> 
> I would like to change the above cancel_*work() calls into cancel_*work_sync()
> calls because this code is used when e.g. switching between I/O schedulers and
> no .queue_rq() calls must be ongoing while switching between schedulers. Do you
> want to integrate that change into this patch or do you want me to post a
> separate patch? In the latter case, should I start from your for-next branch
> to develop that patch or from your for-next branch + this patch series?

I agree, we should make it _sync(). I'll just make the edit in the patch
when I send it out again. I was waiting for further comments on patch 3/3.

-- 
Jens Axboe




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