linux-kernel - Re: [PATCH 04/23] x86, realmode: Move reboot

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Message-ID: <4FAA76E7.1070807@linux.intel.com>
Date:	Wed, 09 May 2012 06:53:43 -0700
From:	"H. Peter Anvin" <hpa@...ux.intel.com>
To:	Jarkko Sakkinen <jarkko.sakkinen@...el.com>
CC:	Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org,
	linux-kbuild@...r.kernel.org, Michal Marek <mmarek@...e.cz>,
	Sam Ravnborg <sam@...nborg.org>,
	Joseph Cihula <joseph.cihula@...el.com>,
	Shane Wang <shane.wang@...el.com>
Subject: Re: [PATCH 04/23] x86, realmode: Move reboot_32.S to unified realmode
 code

On 05/09/2012 05:37 AM, Jarkko Sakkinen wrote:
> 
> It's true that it doesn't matter much but still it is a
> regression. And it doesn't cause any kind of overhead
> or bloat to fix this.
> 

However, the big thing is that we jump to the BIOS with caches off.  I
personally think it is the wrong thing to do (we don't jump to the real
reset vector anyway) but it is what has been tested for a long time.

	-hpa

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