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Re: [Xen-devel] [PATCH] xl: tsc_mode parameter in guest configuration fi

To: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] xl: tsc_mode parameter in guest configuration file
From: Vincent Hanquez <vincent.hanquez@xxxxxxxxxxxxx>
Date: Tue, 30 Mar 2010 09:15:04 +0100
Cc: "Eric Chanudet \(Intern\)" <eric.chanudet@xxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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On 29/03/10 20:49, Dan Magenheimer wrote:
Thanks Eric!

Sorry I didn't mention this earlier, but I just remembered it.

For some of the tsc_mode's to work properly, tsc_mode AND
additional tsc information must be preserved across a
save/restore/migration.  Also, the no_migrate config option has
an indirect impact on tsc_mode; with no_migrate specified
certain guests will be able to use tsc as their primary
clocksource, which can be much faster.  (IOW, implementing
no_migrate is not a requirement, but may be worthwhile.)

it seems that the tsc information are automatically save by xenguest saving code, and embedded in the save image.


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