From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomasz Chmielewski Subject: Re: strange guest slowness after some time Date: Tue, 26 May 2009 14:05:36 +0200 Message-ID: <4A1BDB10.2030603@wpkg.org> References: <49B29705.6000904@wpkg.org> <49D30801.5020201@wpkg.org> <49DA1D75.6000604@wpkg.org> <200904081019.14768.rusty@rustcorp.com.au> <4A1BD765.4080405@wpkg.org> <4A1BD8A7.9090404@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Rusty Russell , "David S. Ahern" , Felix Leimbach , kvm@vger.kernel.org, Anthony Liguori To: Avi Kivity Return-path: Received: from mx03.syneticon.net ([78.111.66.105]:40849 "EHLO mx03.syneticon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750889AbZEZMFX (ORCPT ); Tue, 26 May 2009 08:05:23 -0400 In-Reply-To: <4A1BD8A7.9090404@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: Avi Kivity wrote: > Tomasz Chmielewski wrote: >> >> I still observe this "slowness" with kvm-86 after the guest is running >> for some time (virtio_net and virtio_console seem to be affected; >> guest restart doesn't fix it). >> > > Anything in guest dmesg? No. No hints in syslog, dmesg... Can it be that this is more likely to happens on "busy" hosts? It happens for me on a host where I have 16 guests running. Also, as I booted the host almost 2 days ago, 2 or 3 guests didn't start properly (16 guests were starting at the same time), with their kernel saying: Kernel panic - not syncing: IO-APIC + timer doesn't work! Can it be related? After I restarted these failed guests, they started properly. -- Tomasz Chmielewski http://wpkg.org