linux-kernel - Re: [PATCH 4/4] Add a timer to allow the separation of consigned from steal time.

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Message-ID: <51126A84.5050005@parallels.com>
Date:	Wed, 6 Feb 2013 18:36:52 +0400
From:	Glauber Costa <glommer@...allels.com>
To:	Michael Wolf <mjw@...ux.vnet.ibm.com>
CC:	<linux-kernel@...r.kernel.org>, <riel@...hat.com>,
	<gleb@...hat.com>, <kvm@...r.kernel.org>, <peterz@...radead.org>,
	<mtosatti@...hat.com>, <mingo@...hat.com>, <anthony@...emonkey.ws>
Subject: Re: [PATCH 4/4] Add a timer to allow the separation of consigned
 from steal time.

On 02/06/2013 01:49 AM, Michael Wolf wrote:
> Add a helper routine to scheduler/core.c to allow the kvm module
> to retrieve the cpu hardlimit settings.  The values will be used
> to set up a timer that is used to separate the consigned from the
> steal time.

Sorry: What is the business of a timer in here?
Whenever we read steal time, we know how much time has passed and with
that information we can know the entitlement for the period. This breaks
if we suspend, but we know that we suspended, so this is not a problem.

Everything bigger the entitlement is steal time.


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