linux-kernel - Re: [PATCH 4/4] printk: Use unbound irq work for printing and waking

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Message-ID: <20130821152453.16b07622@gandalf.local.home>
Date:	Wed, 21 Aug 2013 15:24:53 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Jan Kara <jack@...e.cz>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, mhocko@...e.cz, hare@...e.de
Subject: Re: [PATCH 4/4] printk: Use unbound irq work for printing and
 waking

On Wed, 21 Aug 2013 10:08:32 +0200
Jan Kara <jack@...e.cz> wrote:

> Now when per-cpu printk buffers are gone, there's no need to have printk
> flags or printk irq_work per cpu. Just make printk_pending a single
> variable operated by atomic operations and have single unbound irq work
> doing the waking and printing. This has an advantage that any cpu can do the
> printing / wakeup work thus lowering the latency of printing and better
> distributing the printing work over cpus.
> 
> Signed-off-by: Jan Kara <jack@...e.cz>
> ---

Reviewed-by: Steven Rostedt <rostedt@...dmis.org>

-- Steve
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