linux-kernel - Re: [PATCH RFC] kvm: x86: add halt

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Message-ID: <54D3BC94.9010007@siemens.com>
Date:	Thu, 05 Feb 2015 19:55:16 +0100
From:	Jan Kiszka <jan.kiszka@...mens.com>
To:	Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org
CC:	riel@...hat.com, rkrcmar@...hat.com, mtosatti@...hat.com
Subject: Re: [PATCH RFC] kvm: x86: add halt_poll module parameter

On 2015-02-05 17:05, Paolo Bonzini wrote:
> This patch introduces a new module parameter for the KVM module; when it
> is present, KVM attempts a bit of polling on every HLT before scheduling
> itself out via kvm_vcpu_block.

Wouldn't it be better to tune this on a per-VM basis? Think of mixed
workloads with some latency-sensitive and some standard VMs.

Jan

-- 
Siemens AG, Corporate Technology, CT RTC ITP SES-DE
Corporate Competence Center Embedded Linux
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