linux-kernel - Re: [patch] x86: fix fake apicid to node mapping for numa emulation

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Message-ID: <20100506100147.GA19843@elte.hu>
Date:	Thu, 6 May 2010 12:01:47 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	David Rientjes <rientjes@...gle.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
	linux-kernel@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>,
	Suresh Siddha <suresh.b.siddha@...el.com>
Subject: Re: [patch] x86: fix fake apicid to node mapping for numa emulation


* David Rientjes <rientjes@...gle.com> wrote:

> On Thu, 6 May 2010, Ingo Molnar wrote:
> 
> > > apicids must be mapped to the lowest node ids to maintain generic kernel use 
> > > of functions such as cpu_to_node() that determine device affinity.
> > > 
> > > Signed-off-by: David Rientjes <rientjes@...gle.com>
> > > ---
> > >  Third resend of the same patch.
> > > 
> > >  arch/x86/mm/srat_64.c |    3 ++-
> > >  1 files changed, 2 insertions(+), 1 deletions(-)
> > 
> > There's no info in the changelog about what negative effects this bug had when 
> > it was found, on what hardware it occured, and what the general urgency of the 
> > patch is.
> > 
> 
> Ah, true.  Given the relative obscurity of using NUMA emulation to being 
> with, it would probably benefit from being even more verbose as well.  
> I'll rewrite the changelog and reply to this message with it.

Applied to tip:x86/urgent, thanks David!

	Ingo
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