Re: [PATCH v2 1/2] x86/msr: Carry on after a non-"safe" MSR access fails without !panic_on_oops

From	"H. Peter Anvin" <hpa@zytor.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 1/2] x86/msr: Carry on after a non-"safe" MSR access fails without !panic_on_oops
Date	2015-09-30 20:40 +0200
Message-ID	<qeush-4KD-9@gated-at.bofh.it> (permalink)
References	(1 earlier) <qaWQ9-6YN-7@gated-at.bofh.it> <qaWZP-79N-1@gated-at.bofh.it> <qaXVT-8u0-1@gated-at.bofh.it> <qb4Xo-1x9-9@gated-at.bofh.it> <qbcid-3Gm-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 09/21/2015 09:36 AM, Linus Torvalds wrote:
> 
> How many msr reads are <i>so</i> critical that the function call
> overhead would matter? Get rid of the inline version of the _safe()
> thing too, and put that thing there too.
> 

Probably only the ones that may go in the context switch path.

	-hpa


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Re: [PATCH v2 1/2] x86/msr: Carry on after a non-"safe" MSR access  fails without !panic_on_oops "H. Peter Anvin" <hpa@zytor.com> - 2015-09-30 20:40 +0200

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