Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1351739

Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async

From Tejun Heo <tj@kernel.org>
Newsgroups linux.kernel
Subject Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async
Date 2016-03-07 17:00 +0100
Message-ID <ra5JE-4Li-5@gated-at.bofh.it> (permalink)
References (5 earlier) <r9YI9-oh-5@gated-at.bofh.it> <ra0qC-1wR-25@gated-at.bofh.it> <ra13k-1LB-13@gated-at.bofh.it> <ra2iK-2IY-11@gated-at.bofh.it> <ra56X-4wc-35@gated-at.bofh.it>
Organization linux.* mail to news gateway

Show all headers | View raw

Hello,

On Tue, Mar 08, 2016 at 12:10:47AM +0900, Sergey Senozhatsky wrote:
> A new version. Switched to [printk] kthread.

There are some benefits to using a percpu workqueue with CPU_INTENSIVE
set or an unbound workqueue.  It'd need WQ_RESCUER so it'd still
create a dedicated thread which is used under heavy memory pressure
but workqueue will usaully give you local (cpu or node) worker.  One
reason to use kthread directly tho is minimizing the amount of
dependency which is pretty important for printk.  If we decide to use
kthread instead of workqueue, let's please do it for the right reason.

Thanks.

-- 
tejun

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[RFC][PATCH v2 1/2] printk: Make printk() completely async Sergey Senozhatsky <sergey.senozhatsky@gmail.com> - 2016-03-05 12:00 +0100
  Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2016-03-06 07:40 +0100
    Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-03-06 08:20 +0100
      Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2016-03-06 10:40 +0100
        Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-03-06 12:10 +0100
          Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2016-03-06 14:30 +0100
            Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-03-06 16:00 +0100
            Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Jan Kara <jack@suse.cz> - 2016-03-07 09:30 +0100
              Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2016-03-07 11:20 +0100
                Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Jan Kara <jack@suse.cz> - 2016-03-07 12:00 +0100
                Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Jan Kara <jack@suse.cz> - 2016-03-07 13:20 +0100
                Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-03-07 13:40 +0100
                Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Sergey Senozhatsky <sergey.senozhatsky@gmail.com> - 2016-03-07 16:20 +0100
                Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Tejun Heo <tj@kernel.org> - 2016-03-07 17:00 +0100
                Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2016-03-08 11:30 +0100
                Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Tejun Heo <tj@kernel.org> - 2016-03-11 18:30 +0100
                Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Sergey Senozhatsky <sergey.senozhatsky@gmail.com> - 2016-03-12 06:10 +0100
                Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2016-03-09 07:10 +0100
                Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Jan Kara <jack@suse.cz> - 2016-03-10 10:30 +0100
                Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Sergey Senozhatsky <sergey.senozhatsky@gmail.com> - 2016-03-10 17:00 +0100
                Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Petr Mladek <pmladek@suse.com> - 2016-03-10 11:00 +0100
                Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Sergey Senozhatsky <sergey.senozhatsky@gmail.com> - 2016-03-10 17:30 +0100
                Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Sergey Senozhatsky <sergey.senozhatsky@gmail.com> - 2016-03-07 15:50 +0100
                Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-03-07 12:20 +0100
                Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Sergey Senozhatsky <sergey.senozhatsky@gmail.com> - 2016-03-07 15:40 +0100
              Re: [RFC][PATCH v2 1/2] printk: Make printk() completely async Tejun Heo <tj@kernel.org> - 2016-03-07 16:50 +0100

csiph-web