linux-kernel - Re: [RFC][PATCH v8 2/2] printk: Make wake_up_klogd_work

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Message-ID: <20160331111442.GC1023@pathway.suse.cz>
Date:	Thu, 31 Mar 2016 13:14:42 +0200
From:	Petr Mladek <pmladek@...e.com>
To:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Jan Kara <jack@...e.com>, Tejun Heo <tj@...nel.org>,
	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	linux-kernel@...r.kernel.org,
	Byungchul Park <byungchul.park@....com>,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	Jan Kara <jack@...e.cz>
Subject: Re: [RFC][PATCH v8 2/2] printk: Make wake_up_klogd_work_func() async

On Fri 2016-03-25 00:43:23, Sergey Senozhatsky wrote:
> From: Jan Kara <jack@...e.cz>
> 
> Offload printing of scheduler deferred messages from IRQ context
> to a schedulable printing kthread, when possible (the same way we
> do it in vprintk_emit()). Otherwise, the CPU can spend unbounded
> amount of time doing printing in console_unlock() from IRQ.
> 
> Signed-off-by: Jan Kara <jack@...e.cz>
> Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>

Nice change. Makes perfect sense.

Reviewed-by: Petr Mladek <pmladek@...e.com>

Best Regards,
Petr