From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: KVM: x86: add module parameter to disable periodic kvmclock sync Date: Thu, 13 Nov 2014 18:47:40 +0100 Message-ID: <5464EEBC.7080602@redhat.com> References: <20141113024439.GA7402@amt.cnet> <20141113084040.GA3193@hawk.usersys.redhat.com> <20141113104401.GA4325@hawk.usersys.redhat.com> <20141113113219.GA5233@hawk.usersys.redhat.com> <20141113174658.GA6801@potion.brq.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Marcelo Tosatti , kvm-devel To: =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= , Andrew Jones Return-path: Received: from mx1.redhat.com ([209.132.183.28]:43931 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933690AbaKMRrp (ORCPT ); Thu, 13 Nov 2014 12:47:45 -0500 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id sADHljXx000816 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Thu, 13 Nov 2014 12:47:45 -0500 In-Reply-To: <20141113174658.GA6801@potion.brq.redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On 13/11/2014 18:46, Radim Kr=C4=8Dm=C3=A1=C5=99 wrote: > Yes, or add callbacks to sysfs writes that would schedule/cancel this > work. (But having a for_every_vm loop is quite ugly.) >=20 > I'd be happy with a 'const kvmclock_periodic_sync'. > (Having useless timers is weird if we care about latencies.) I agree. Paolo