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

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Date:	Wed, 24 Sep 2008 17:10:24 +0300
From:	Cristi Magherusan <cristi.magherusan@....utcluj.ro>
To:	Yan Li <elliot.li.tech@...il.com>
Cc:	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, 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.

Cristi

-- 
Cristi Măgherușan,
Inginer de sistem/retea
Universitatea Tehnică din Cluj-Napoca
Centrul de Comunicații "Pusztai Kalman"
Tel. 0264/401247  http://cc.utcluj.ro

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