linux-kernel - Re: getting processor numbers

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Date:	Tue, 03 Apr 2007 10:17:15 -0700
From:	Ulrich Drepper <drepper@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: getting processor numbers

Andi Kleen wrote:
> There was a proposal some time ago to put that into the ELF aux vector
> Unfortunately there was disagreement on what information to put 
> there exactly (full topology, only limited numbers etc.) 

Topology, yes, I'm likely in favor of it.

Processor number: no.  Unless you want to rip out hotpluging.  I'm
certainly in favor of that, it creates huge problems for  no real
benefit for the common use cases.  But as it is, the number of
processors is not necessarily constant over the lifetime of a process.
The machine architecture is.

-- 
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖

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