linux-kernel - Re: [patch v2] x86: reduce srat verbosity in the kernel log

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Message-ID: <alpine.DEB.2.00.0911101307440.28728@chino.kir.corp.google.com>
Date:	Tue, 10 Nov 2009 13:08:23 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Ingo Molnar <mingo@...e.hu>
cc:	Mike Travis <travis@....com>, Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jack Steiner <steiner@....com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Yinghai Lu <yinghai@...nel.org>, Mel Gorman <mel@....ul.ie>,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: [patch v2] x86: reduce srat verbosity in the kernel log

On Tue, 27 Oct 2009, David Rientjes wrote:

> x86: reduce srat verbosity in the kernel log
> 
> It's possible to reduce the number of SRAT messages emitted to the kernel
> log by printing each valid pxm once and then creating bitmaps to represent
> the apic ids that map to the same node.
> 
> This reduces lines such as
> 
> 	SRAT: PXM 0 -> APIC 0 -> Node 0
> 	SRAT: PXM 0 -> APIC 1 -> Node 0
> 	SRAT: PXM 1 -> APIC 2 -> Node 1
> 	SRAT: PXM 1 -> APIC 3 -> Node 1
> 
> to
> 
> 	SRAT: PXM 0 -> APIC {0-1} -> Node 0
> 	SRAT: PXM 1 -> APIC {2-3} -> Node 1
> 
> The buffer used to store the apic id list is 128 characters in length.
> If that is too small to represent all the apic id ranges that are bound
> to a single pxm, a trailing "..." is added.  APICID_LIST_LEN should be
> manually increased for such configurations.
> 
> Acked-by: Mike Travis <travis@....com>
> Signed-off-by: David Rientjes <rientjes@...gle.com>

Ingo, have you had a chance to look at merging this yet?
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