From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: kvm: zapping shadow pages for mmio generation wraparound Date: Tue, 23 Jul 2013 13:50:21 +0200 Message-ID: <51EE6DFD.6080701@redhat.com> References: <51ED9CC0.9070405@bitsync.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Zlatko Calusic Return-path: Received: from mail-yh0-f54.google.com ([209.85.213.54]:50131 "EHLO mail-yh0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756154Ab3GWL4y (ORCPT ); Tue, 23 Jul 2013 07:56:54 -0400 Received: by mail-yh0-f54.google.com with SMTP id f73so2855973yha.13 for ; Tue, 23 Jul 2013 04:56:53 -0700 (PDT) In-Reply-To: <51ED9CC0.9070405@bitsync.net> Sender: kvm-owner@vger.kernel.org List-ID: Il 22/07/2013 22:57, Zlatko Calusic ha scritto: > I'm getting a lot of these in kernel 3.11.0-rc1: > > Jul 19 19:53:06 ps kernel: kvm: zapping shadow pages for mmio generation > wraparound > Jul 19 22:37:47 ps kernel: kvm: zapping shadow pages for mmio generation > wraparound > Jul 20 00:07:24 ps kernel: kvm: zapping shadow pages for mmio generation > wraparound > Jul 20 00:11:04 ps kernel: kvm: zapping shadow pages for mmio generation > wraparound > Jul 20 00:39:14 ps kernel: kvm: zapping shadow pages for mmio generation > wraparound > Jul 21 00:25:32 ps kernel: kvm: zapping shadow pages for mmio generation > wraparound > > There seems to be one line in the kernel log for every reboot of a WinXP > guest, and I'm getting a bit bored with it. I don't understand what > those messages mean? What can I do to stop them flooding the log? > > Please Cc: (not subscribed) The log message would let us correlate any reports with a new optimization (added in 3.11). We will probably downgrade it to KERN_DEBUG before 3.11 goes out (or otherwise cause it to disappear), in the meanwhile it's harmless. Paolo