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Subject: Re: [PATCH V3 0/4] genirq/affinity: irq vector spread among online
 CPUs as far as possible
From:   Artem Bityutskiy <dedekind1@gmail.com>
Reply-To: dedekind1@gmail.com
To:     Ming Lei <ming.lei@redhat.com>
Cc:     Dou Liyang <douly.fnst@cn.fujitsu.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Jens Axboe <axboe@kernel.dk>,
        Christoph Hellwig <hch@infradead.org>,
        linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
        Laurence Oberman <loberman@redhat.com>,
        "Rafael J. Wysocki" <rafael@kernel.org>
Date:   Tue, 13 Mar 2018 10:39:35 +0200
In-Reply-To: <20180313083535.GA21612@ming.t460p>
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On Tue, 2018-03-13 at 16:35 +0800, Ming Lei wrote:
> Then looks this issue need to fix by making possible CPU count
> accurate
> because there are other resources allocated according to
> num_possible_cpus(),
> such as percpu variables.

Short term the regression should be fixed. It is already v4.16-rc6, we
have little time left.

Longer term, yeah, I agree. Kernel's notion of possible CPU count
should be realistic.

Artem.