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RE: [Xen-devel] tsc_mode == 1 and hvm guests

from [Zhang, Xiantao] [Permanent Link][Original]
To: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] tsc_mode == 1 and hvm guests
From: "Zhang, Xiantao" <xiantao.zhang@xxxxxxxxx>
Date: Fri, 7 May 2010 16:18:49 +0800
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Cc: "Xu, Dongxiao" <dongxiao.xu@xxxxxxxxx>
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Thread-topic: [Xen-devel] tsc_mode == 1 and hvm guests 
>>> 
>>> Also there are two gtsc_khz AFAICT: d->arch.tsc_khz and
>>> d->arch.hvm_domain.gtsc_khz, why hvm guests have their own separate
>>> record of the guest tsc frequency, when they never actually change
>>> it? 

The latter one is only used for save/restore and migration to record the 
guest's expected TSC frequency.  Thanks!  
Xiantao

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