From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Kiszka Subject: Re: [PATCH RFC] kvm: x86: add halt_poll module parameter Date: Thu, 05 Feb 2015 19:55:16 +0100 Message-ID: <54D3BC94.9010007@siemens.com> References: <1423152325-5094-1-git-send-email-pbonzini@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: 7bit Cc: riel@redhat.com, rkrcmar@redhat.com, mtosatti@redhat.com To: Paolo Bonzini , linux-kernel@vger.kernel.org, kvm@vger.kernel.org Return-path: In-Reply-To: <1423152325-5094-1-git-send-email-pbonzini@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org 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