linux-kernel - Re: [PATCH] irq.h remove padding from irq

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Message-ID: <20081123151507.GE3224@elte.hu>
Date:	Sun, 23 Nov 2008 16:15:07 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Richard Kennedy <richard@....demon.co.uk>
Cc:	tglx@...utronix.de, lkml <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] irq.h remove padding from irq_desc on 64bits


* Richard Kennedy <richard@....demon.co.uk> wrote:

> struct irq_desc : reorder to remove padding on 64bits
>     
> shrinks irq_desc to 128 bytes which saves data space & cache lines
> 
> On a generic x86_64/SMP build this reduces the reported data size by
> 64k.
> 
> Signed-off-by: Richard Kennedy <richard@....demon.co.uk>
> 
> ----
> This patch is against 2.628-rc6, built & tested on AMD 64x2 desktop.

nice one - applied to tip/irq/core, thanks Richard!

	Ingo
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