linux-kernel - Re: [PATCH v2] x86, mm: Avoid duplicated pxm_to

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Date:	Sun, 26 Jan 2014 13:08:37 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Yinghai Lu <yinghai@...nel.org>
cc:	Ingo Molnar <mingo@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
	Toshi Kani <toshi.kani@...com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] x86, mm: Avoid duplicated pxm_to_node() calling.

On Sun, 26 Jan 2014, Yinghai Lu wrote:

> In slit init code, more pxm_to_node() calling are added.
> 
> We can store from_node/to_node instead of keep calling pxm_to_node().
> 
> After this patch: pxm_to_node() is called n*(1+n)
> Before this patch: pxm_to_node() is called n*(1+n*3)
> 
> for 8 socket, it will be 72 instead of 200.
> for 32 socket, it will be 1056 instead of 3104.
> 
> -v2: update title and change log according to Ingo.
>      move from_node/to_node in loop and change to const according to
> 	David Rientjes.
> 
> Signed-off-by: Yinghai Lu <yinghai@...nel.org>

Acked-by: David Rientjes <rientjes@...gle.com>
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