linux-kernel - Re: [PATCH v4 0/3] KVM: Dynamic Halt-Polling

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Date:	Sat, 29 Aug 2015 17:13:07 -0700
From:	Peter Kieser <peter@...ser.ca>
To:	Wanpeng Li <wanpeng.li@...mail.com>
Cc:	Paolo Bonzini <pbonzini@...hat.com>,
	David Matlack <dmatlack@...gle.com>, kvm <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 0/3] KVM: Dynamic Halt-Polling



On 2015-08-29 4:55 PM, Wanpeng Li wrote:
> On 8/30/15 6:26 AM, Peter Kieser wrote:
>> Thanks, Wanpeng. Applied this to Linux 3.18 and seeing much higher 
>> CPU usage (200%) for qemu 2.4.0 process on a Windows 10 x64 guest. 
>> qemu parameters:
>
> Thanks for the report. If Paolo's patch "kvm: add halt_poll_ns module 
> parameter" is applied on your 3.18? Btw, do you test the linux guest? 

No high CPU usage on Linux guests. Following patch series are applied 
(in order):

* kvm: add halt_poll_ns module parameter
* KVM: make halt_poll_ns static
* KVM: Dynamic Halt-Polling v4

-Peter



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