linux-kernel - Re: invalidate caches before going into suspend

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Message-ID: <48A31BF5.7060608@zytor.com>
Date:	Wed, 13 Aug 2008 10:37:57 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Mark Langsdorf <mark.langsdorf@....com>,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: invalidate caches before going into suspend

Ingo Molnar wrote:
>>>
>> Not significantly, but I cannot for my life figure out how it could 
>> help.
>>
>> Either the interrupts will be blocked by the CLI already in effect, or 
>> the additional CLI will not help, either (in fact, it will just 
>> slightly increase the window for something like that to slip in.)
> 
> ah, the main point i tried to make was to have the CLI _before_ the 
> WBINVD - which Mark's patch didnt do.
> 

Ah yes, that's important.

	-hpa
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