linux-kernel - Re: [patch V5 4/8] nvme-pci: Simplify interrupt allocation

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Message-ID: <alpine.DEB.2.21.1902151053520.1646@nanos.tec.linutronix.de>
Date:   Fri, 15 Feb 2019 10:54:32 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Marc Zyngier <marc.zyngier@....com>
cc:     LKML <linux-kernel@...r.kernel.org>,
        Ming Lei <ming.lei@...hat.com>, Christoph Hellwig <hch@....de>,
        Bjorn Helgaas <helgaas@...nel.org>,
        Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
        Sagi Grimberg <sagi@...mberg.me>,
        linux-nvme@...ts.infradead.org, linux-pci@...r.kernel.org,
        Keith Busch <keith.busch@...el.com>,
        Sumit Saxena <sumit.saxena@...adcom.com>,
        Kashyap Desai <kashyap.desai@...adcom.com>,
        Shivasharan Srikanteshwara 
        <shivasharan.srikanteshwara@...adcom.com>
Subject: Re: [patch V5 4/8] nvme-pci: Simplify interrupt allocation

On Fri, 15 Feb 2019, Thomas Gleixner wrote:
> On Fri, 15 Feb 2019, Marc Zyngier wrote:
> > > +	 */
> > > +	if (nrirqs == 1)
> > > +		nr_read_queues = 0;
> > > +	else if (write_queues >= nrirqs)
> > > +		nr_read_queues = nrirqs - 1;
> > 
> > ... while this seem to ensure that we carve out one write queue out of
> > the irq set. It looks like a departure from the original code, which
> > would set nr_read_queues to 1 in that particular case.
> 
> Bah. right you are.

That needs to be:

     nr_read_queues = 1;

obviously.

/me blushes.