linux-kernel - Re: [PATCH 1/2] VMware guest detection for x86 and x86-64

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Message-ID: <20080924142322.GA21049@yantp.cn.ibm.com>
Date:	Wed, 24 Sep 2008 22:23:22 +0800
From:	Yan Li <elliot.li.tech@...il.com>
To:	Cristi Magherusan <cristi.magherusan@....utcluj.ro>
Cc:	Yan Li <elliot.li.tech@...il.com>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	joerg.roedel@....com, rjmaomao@...il.com,
	Yinghai Lu <yhlu.kernel@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>, nancydreaming@...il.com
Subject: Re: [PATCH 1/2] VMware guest detection for x86 and x86-64

On Wed, Sep 24, 2008 at 05:10:24PM +0300, Cristi Magherusan wrote:
> On Wed, 2008-09-24 at 20:22 +0800, Yan Li wrote:
> > Detects whether we are running as a VMware guest or not. Detection is
> > based upon DMI vendor string.
> > 
> > It provides a function:
> > int is_vmware_guest(void)
> > that can be used easily to detect if we are running as a VMware guest
> > or not.
> 
> We can also use this feature to force the HZ value to 100 or 250 at most
> when running in a virtual environment, since VirtualBox had some issues
> with this by taking a lot of CPU time when the HZ was set to 1000.

That's good. But this function is used for detecting VMware guest
only.  Do you think VMware also suffers from this problem?

-- 
Li, Yan
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