linux-kernel - Re: [patch 2/3] blk/mq/cpu-notif: Convert to hotplug state machine

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Date:   Tue, 20 Sep 2016 01:37:19 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Christoph Hellwing <hch@....de>
cc:     LKML <linux-kernel@...r.kernel.org>, linux-block@...r.kernel.org,
        Jens Axboe <axboe@...nel.dk>,
        Sebastian Siewior <bigeasy@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>, rt@...utronix.de
Subject: Re: [patch 2/3] blk/mq/cpu-notif: Convert to hotplug state machine

On Tue, 20 Sep 2016, Christoph Hellwing wrote:

> On Mon, Sep 19, 2016 at 09:28:20PM -0000, Thomas Gleixner wrote:
> > From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
> > 
> > Install the callbacks via the state machine so we can phase out the cpu
> > hotplug notifiers..
> 
> Didn't Sebastian come up with a version of the hotplug state callbacks
> that can be per-object?  This seems to be a perfect candidate for that.

Indeed. I wrote that myself and forgot about it already..... :(

So yes, we can use that and get rid of blk-mq-cpu.c completely.

Thanks,

	tglx