linux-kernel - Re: [PATCH] kvm: robustify steal time record

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Message-ID: <20160503153048.GB27975@potion>
Date:	Tue, 3 May 2016 17:30:48 +0200
From:	Radim <rkrcmar@...hat.com>
To:	Wanpeng Li <wanpeng.li@...mail.com>
Cc:	Paolo Bonzini <pbonzini@...hat.com>,
	Wincy Van <fanwenyi0529@...il.com>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kvm: robustify steal time record

2016-05-03 03:19+0000, Wanpeng Li:
> From: Wanpeng Li <wanpeng.li@...mail.com>
> 
> Guest should only trust data to be valid when version haven't changed 
> before and after reads of steal time. Besides not changing, it has to 
> be an even number. Hypervisor may write an odd number to version field 
> to indicate that an update is in progress.
> 
> kvm_steal_clock() in guest has already done the read side, make write 
> side in hypervisor more robust by following the above rule.
> 
> Reviewed-by: Wincy Van <fanwenyi0529@...il.com>
> Signed-off-by: Wanpeng Li <wanpeng.li@...mail.com>
> ---

Queued, thanks.