linux-kernel - Re: [PATCH] printk: Shrink printk_sched buffer size, eliminate it when !CONFIG

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Date:	Tue, 05 Jun 2012 09:04:28 -0700
From:	Joe Perches <joe@...ches.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kay Sievers <kay@...y.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] printk: Shrink printk_sched buffer size, eliminate it
 when !CONFIG_PRINTK

On Tue, 2012-05-29 at 11:17 -0700, Joe Perches wrote:
> The size of the per-cpu printk_sched buf is much larger
> than necessary.  The maximum sched message emitted is
> ~80 bytes. Shrink the allocation for this printk_sched
> buffer from 512 bytes to 128.
> 
> printk_sched creates an unnecessary per-cpu buffer when
> CONFIG_PRINTK is not enabled.  Remove it when appropriate
> so embedded uses save a bit of space too.

Ingo, what's happening with this patch?


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