linux-kernel - Re: [PATCH RFC] x86: fix confusing name of /proc/cpuinfo "ht" flag

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Date:	Thu, 12 Nov 2009 07:59:30 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	Dave Jones <davej@...emonkey.org.uk>
Subject: Re: [PATCH RFC] x86: fix confusing name of /proc/cpuinfo "ht" flag

* Bartlomiej Zolnierkiewicz <bzolnier@...il.com> wrote:

> "ht" flag indicates only ability to detect siblings not HT presence 
> itself.
> 
> Inspired by:
> http://www.codemonkey.org.uk/2009/11/10/common-hyperthreading-misconception/

i think instead of changing 'ht' to 'ht_detect', it would be even more 
intuitive to only expose the 'ht' flag if the ht-detect capability is 
there _and_ if the number of siblings is 2 or more.

That way we dont change it - we just 'hide' the 'ht' string on the 
category of systems that can enumerate HT via the CPUID but dont 
actually have HyperThreading.

Hm?

	Ingo
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