linux-kernel - Re: [PATCH 7/8] mq-deadline: add blk-mq adaptation of the deadline IO scheduler

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Message-ID: <20170120142857.GC18162@kernel.dk>
Date:   Fri, 20 Jan 2017 07:28:57 -0700
From:   Jens Axboe <axboe@...com>
To:     Paolo Valente <paolo.valente@...aro.org>
CC:     <linux-block@...r.kernel.org>,
        Linux-Kernal <linux-kernel@...r.kernel.org>, <osandov@...com>
Subject: Re: [PATCH 7/8] mq-deadline: add blk-mq adaptation of the deadline
 IO scheduler

On Fri, Jan 20 2017, Paolo Valente wrote:
> 
> > Il giorno 20 gen 2017, alle ore 14:14, Paolo Valente <paolo.valente@...aro.org> ha scritto:
> > 
> >> 
> >> Il giorno 17 dic 2016, alle ore 01:12, Jens Axboe <axboe@...com> ha scritto:
> >> 
> >> This is basically identical to deadline-iosched, except it registers
> >> as a MQ capable scheduler. This is still a single queue design.
> >> 
> > 
> > Jens,
> > no spin_lock_irq* in the code.  So, also request dispatches are
> > guaranteed to never be executed in IRQ context?
> 
> Or maybe the opposite? That is, all scheduler functions invoked in IRQ context?

Nope

-- 
Jens Axboe