linux-kernel - Re: [PATCH] x86: UV BAU fix for non-consecutive nasids

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Message-ID: <20110510062653.GA11595@elte.hu>
Date:	Tue, 10 May 2011 08:26:53 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Cliff Wickman <cpw@....com>
Cc:	linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] x86: UV BAU fix for non-consecutive nasids


* Cliff Wickman <cpw@....com> wrote:

> From: Cliff Wickman <cpw@....com>
> 
> This is a fix for the SGI Altix-UV Broadcast Assist Unit code, which is
> used for TLB flushing.
> 
> This patch allows nasids (numa address space id's) to be non-consecutive, as is
> the case when using nasid striding or in some certain hardware configurations.
> It also provides a table in local memory for each cpu to translate target cpu
> number to target pnode and nasid.

This changelog is missing one or more of the following essential pieces
of information:

 - what user-visible problem is the patch solving
 - how was the problem triggered, how was the bug found
 - what/how many systems are affected
 - why should maintainers apply this patch right now

Thanks,

	Ingo
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