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

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Message-ID: <1390849530.1792.513.camel@misato.fc.hp.com>
Date:	Mon, 27 Jan 2014 12:05:30 -0700
From:	Toshi Kani <toshi.kani@...com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Ingo Molnar <mingo@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] x86, mm: Avoid duplicated pxm_to_node() calling.

On Mon, 2014-01-27 at 11:08 -0800, Yinghai Lu wrote:
> On Mon, Jan 27, 2014 at 6:49 AM, Toshi Kani <toshi.kani@...com> wrote:
> > On Sun, 2014-01-26 at 13:01 -0800, 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>
> >
> > In my original patch, I added the following comment to the function to
> > address David's comment (which he acked).  So, can you add this comment?
> >
> > -/* Callback for SLIT parsing */
> > +/*
> > + * Callback for SLIT parsing.  pxm_to_node() returns NUMA_NO_NODE for
> > + * I/O localities since SRAT does not list them.  I/O localities are
> > + * not supported at this point.
> > + */
> >
> > Otherwise, the change looks good to me.
> >
> > Acked-by: Toshi Kani <toshi.kani@...com>
> 
> Hi, Toshi,
> 
> This patch is delta patch to your patch that is in tip already.
> 
> So you comments change is still there and not touched.

Hi Yinghai,

Sounds great!  Thanks for the clarification!

-Toshi


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