[Fwd: RFC: deprecate CONFIG_X86_CPU_DEBUG and schedule it for rapid removal]

Stefan Bader stefan.bader at canonical.com
Tue Jan 19 10:39:25 UTC 2010

Found on stable. We only have it =m for amd64 but for consistency might want to
disable it commonly.


-------- Original Message --------
Subject: RFC: deprecate CONFIG_X86_CPU_DEBUG and schedule it for rapid removal
Date: Sun, 17 Jan 2010 17:26:53 -0800
From: H. Peter Anvin <hpa at zytor.com>
To: Rafael J. Wysocki <rjw at sisk.pl>
CC: Ozan Çağlayan <ozan at pardus.org.tr>,        Yinghai Lu <yinghai at kernel.org>,
       "linux-kernel at vger.kernel.org" <linux-kernel at vger.kernel.org>,
mingo at elte.hu, a.p.zijlstra at chello.nl, stable at kernel.org,        Linus Torvalds
<torvalds at linux-foundation.org>,        Andrew Morton
<akpm at linux-foundation.org>,        Jaswinder Singh Rajput
<jaswinder at kernel.org>,        Ingo Molnar <mingo at elte.hu>, Thomas Gleixner
<tglx at linutronix.de>
References: <4B4E1633.8010700 at pardus.org.tr> <201001162312.34189.rjw at sisk.pl>
<4B52D6E2.8000904 at pardus.org.tr> <201001171444.14551.rjw at sisk.pl>

CONFIG_X86_CPU_DEBUG really seems to be causing more problems than it
ever solved.  This is an RFC for immediately deprecating it, and
schedule it for removal in the 2.6.34 cycle.

If this was a high value feature, it would be different -- but it's not
even close.

Posting this as an RFC just on the offchance someone actually depends on


H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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