linux-kernel - Re: RFC: deprecate CONFIG_X86_CPU_DEBUG and schedule it for rapid removal

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Date:	Fri, 22 Jan 2010 18:34:53 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Ozan Çağlayan <ozan@...dus.org.tr>,
	Yinghai Lu <yinghai@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	mingo@...e.hu, a.p.zijlstra@...llo.nl, stable@...nel.org,
	Jaswinder Singh Rajput <jaswinder@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: RFC: deprecate CONFIG_X86_CPU_DEBUG and schedule it for rapid removal

Makes sense.  Will do.

"Linus Torvalds" <torvalds@...ux-foundation.org> wrote:

>
>
>On Fri, 22 Jan 2010, Andrew Morton wrote:
>> 
>> We know that enabling this feature will cause some machines to hang,
>> and that this problem has existed for six months.
>> 
>> Would it not be better to fix that problem (perhaps just with the
>> revert) so that 2.6.33, 2.6.32.x and earlier can be fixed?  Then we can
>> nuke the feature in 2.6.34.
>
>Another way of looking at is "we know it's been broken for six months, and 
>clearly nobody really ever enabled it in any distro, and even getting a 
>bug report on it took forever. So why keep it around at all"?
>
>So I'd personally rather just remove it outright than deprecate it or even 
>try to fix it. Since clearly absolutely nobody depends on it.
>
>The usual reason for deprecating a feature is to give people time to move 
>away from it, but since clearly nobody uses it...
>
>		Linus

--
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