linux-kernel - Re: [PATCH v5 4/9] KVM-HV: KVM Steal time implementation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 06 Jul 2011 12:08:48 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Glauber Costa <glommer@...hat.com>
CC:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Avi Kivity <avi@...hat.com>,
	Anthony Liguori <aliguori@...ibm.com>,
	Eric B Munson <emunson@...bm.net>
Subject: Re: [PATCH v5 4/9] KVM-HV: KVM Steal time implementation

On 07/04/2011 11:32 AM, Glauber Costa wrote:
> To implement steal time, we need the hypervisor to pass the guest
> information about how much time was spent running other processes
> outside the VM, while the vcpu had meaningful work to do - halt
> time does not count.
>
> This information is acquired through the run_delay field of
> delayacct/schedstats infrastructure, that counts time spent in a
> runqueue but not running.
>
> Steal time is a per-cpu information, so the traditional MSR-based
> infrastructure is used. A new msr, KVM_MSR_STEAL_TIME, holds the
> memory area address containing information about steal time
>
> This patch contains the hypervisor part of the steal time infrasructure,
> and can be backported independently of the guest portion.
>
> Signed-off-by: Glauber Costa<glommer@...hat.com>
> CC: Rik van Riel<riel@...hat.com>
> CC: Jeremy Fitzhardinge<jeremy.fitzhardinge@...rix.com>
> CC: Peter Zijlstra<peterz@...radead.org>
> CC: Avi Kivity<avi@...hat.com>
> CC: Anthony Liguori<aliguori@...ibm.com>
> CC: Eric B Munson<emunson@...bm.net>

Acked-by: Rik van Riel <riel@...hat.com>


-- 
All rights reversed
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/