linux-kernel - Re: [PATCH 6/8] blk-mq-sched: add framework for MQ capable IO schedulers

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Message-Id: <330DF208-2B8E-4D29-A2AD-B335BF495AAE@linaro.org>
Date:   Thu, 22 Dec 2016 16:20:06 +0100
From:   Paolo Valente <paolo.valente@...aro.org>
To:     Jens Axboe <axboe@...com>
Cc:     linux-block@...r.kernel.org,
        Linux-Kernal <linux-kernel@...r.kernel.org>, osandov@...com
Subject: Re: [PATCH 6/8] blk-mq-sched: add framework for MQ capable IO schedulers


> Il giorno 21 dic 2016, alle ore 03:22, Jens Axboe <axboe@...com> ha scritto:
> 
> On Tue, Dec 20 2016, Paolo Valente wrote:
>>> +	else
>>> +		rq = __blk_mq_alloc_request(data, op);
>>> +
>>> +	if (rq) {
>>> +		rq->elv.icq = NULL;
>>> +		if (e && e->type->icq_cache)
>>> +			blk_mq_sched_assign_ioc(q, rq, bio);
>> 
>> bfq needs rq->elv.icq to be consistent in bfq_get_request, but the
>> needed initialization seems to occur only after mq.get_request is
>> invoked.
> 
> Can you do it from get/put_rq_priv?

Definitely, I just overlooked them, sorry :(

Thanks,
Paolo

> The icq is assigned there. If not,
> we can redo this part, not a big deal.
> 
> -- 
> Jens Axboe
> 
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