linux-kernel - Re: [PATCH 4/8] genirq/affinity: assign vectors to all present CPUs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <5a48e208-9279-9db9-2465-dfdb8d0319e5@grimberg.me>
Date:   Sun, 4 Jun 2017 18:17:10 +0300
From:   Sagi Grimberg <sagi@...mberg.me>
To:     Christoph Hellwig <hch@....de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jens Axboe <axboe@...nel.dk>
Cc:     Keith Busch <keith.busch@...el.com>, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-nvme@...ts.infradead.org
Subject: Re: [PATCH 4/8] genirq/affinity: assign vectors to all present CPUs



On 03/06/17 17:03, Christoph Hellwig wrote:
> Currently we only assign spread vectors to online CPUs, which ties the
> IRQ mapping to the currently online devices and doesn't deal nicely with
> the fact that CPUs could come and go rapidly due to e.g. power management.
> 
> Instead assign vectors to all present CPUs to avoid this churn.
> 
> For this we have to build a map of all possible CPUs for a give node, as

s/give/given/

Reviewed-by: Sagi Grimberg <sagi@...mberg.me>