To: Avi Kivity <avi@argo.co.il>
Cc: john stultz <johnstul@us.ibm.com>, Con Kolivas <kernel@kolivas.org>,
       Andreas Mohr <andi@rhlx01.fht-esslingen.de>,
       bert hubert <bert.hubert@netherlabs.nl>, linux-kernel@vger.kernel.org,
       george@mvista.com
Subject: Re: gettimeofday order of magnitude slower with pmtimer, which is default
References: <20060320122449.GA29718@outpost.ds9a.nl>
	<20060320145047.GA12332@rhlx01.fht-esslingen.de>
	<200603210224.23540.kernel@kolivas.org>
	<87wteo37vr.fsf@duaron.myhome.or.jp>
	<1142968999.4281.4.camel@leatherman>
	<8764m7xzqg.fsf@duaron.myhome.or.jp> <4421A18F.4040600@argo.co.il>
From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Date: Thu, 23 Mar 2006 04:54:30 +0900
In-Reply-To: <4421A18F.4040600@argo.co.il> (Avi Kivity's message of "Wed, 22 Mar 2006 21:12:15 +0200")
Message-ID: <87u09ql0g9.fsf@duaron.myhome.or.jp>
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Avi Kivity <avi@argo.co.il> writes:

> OGAWA Hirofumi wrote:
>> Current patch is the following. If I'm missing something, or you have
>> some comment, please tell me. (Since I don't have ICH4, ICH4 detection
>> is untested)
>>   
> Doesn't it make sense to mark the port as user accessible in the I/O 
> permissions bitmap and export it as a vsyscall? that would save the 
> syscall overhead.

Umm.. I don't know. In userland, can we make a stable gettimeofday()
from only PMTMR?
-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
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