From mboxrd@z Thu Jan 1 00:00:00 1970 From: Radim =?utf-8?B?S3LEjW3DocWZ?= Subject: Re: [PATCH v2 0/2] maintaining of kvm_clock stability on guest vCPU hotplug Date: Wed, 12 Apr 2017 21:02:26 +0200 Message-ID: <20170412190225.GD20145@potion> References: <1491556193-56543-1-git-send-email-dplotnikov@virtuozzo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: pbonzini@redhat.com, mtosatti@redhat.com, kvm@vger.kernel.org, rkagan@virtuozzo.com, den@virtuozzo.com To: Denis Plotnikov Return-path: Received: from mx1.redhat.com ([209.132.183.28]:49344 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752506AbdDLTCq (ORCPT ); Wed, 12 Apr 2017 15:02:46 -0400 Content-Disposition: inline In-Reply-To: <1491556193-56543-1-git-send-email-dplotnikov@virtuozzo.com> Sender: kvm-owner@vger.kernel.org List-ID: 2017-04-07 12:09+0300, Denis Plotnikov: > new in v2: > - fix possible wraparound on the synchronization detection > - lines exceeding 80 chars are re-formatted > - excess parentheses are removed > > ====================== > > It was found, that after adding a new vCPU to a running VM (CPU hotplug) > kvm_clock lost the stability property in case of using it. This happened > because KVM didn't treated cpu hotplug as a special case of TSC > synchronization. > This patch series adds cpu hotplug to the TSC synchronization cases. Great cleanup as well, applied to kvm/queue, thanks.