linux-kernel - Re: Question on handling managed IRQs when hotplugging CPUs

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Message-ID: <20190205182325.GA3302@lst.de>
Date:   Tue, 5 Feb 2019 19:23:25 +0100
From:   Christoph Hellwig <hch@....de>
To:     John Garry <john.garry@...wei.com>
Cc:     Keith Busch <keith.busch@...el.com>,
        Hannes Reinecke <hare@...e.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Christoph Hellwig <hch@....de>,
        Marc Zyngier <marc.zyngier@....com>,
        "axboe@...nel.dk" <axboe@...nel.dk>,
        Peter Zijlstra <peterz@...radead.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Linuxarm <linuxarm@...wei.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Hannes Reinecke <hare@...e.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>
Subject: Re: Question on handling managed IRQs when hotplugging CPUs

On Tue, Feb 05, 2019 at 03:09:28PM +0000, John Garry wrote:
> For SCSI devices, unfortunately not all IO sent to the HW originates from 
> blk-mq or any other single entity.

Where else would SCSI I/O originate from?