From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1G02pn-0001lJ-Pq for qemu-devel@nongnu.org; Mon, 10 Jul 2006 16:58:27 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1G02pm-0001jW-0l for qemu-devel@nongnu.org; Mon, 10 Jul 2006 16:58:27 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1G02pl-0001jL-Sd for qemu-devel@nongnu.org; Mon, 10 Jul 2006 16:58:25 -0400 Received: from [84.96.92.61] (helo=sMtp.neuf.fr) by monty-python.gnu.org with esmtp (Exim 4.52) id 1G02qv-0005d5-CF for qemu-devel@nongnu.org; Mon, 10 Jul 2006 16:59:37 -0400 Received: from [84.102.211.40] by sp604002mt.gpm.neuf.ld (Sun Java System Messaging Server 6.2-5.05 (built Feb 16 2006)) with ESMTP id <0J2700MH8GBC7PX0@sp604002mt.gpm.neuf.ld> for qemu-devel@nongnu.org; Mon, 10 Jul 2006 22:45:12 +0200 (CEST) Date: Mon, 10 Jul 2006 22:45:08 +0200 From: Fabrice Bellard Subject: Re: [Qemu-devel] rtc: lost some interrupts at 1024Hz. In-reply-to: <44B1EF07.9060302@wasp.net.au> Message-id: <44B2BC54.60809@bellard.org> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii; format=flowed Content-transfer-encoding: 7BIT References: <44B1EF07.9060302@wasp.net.au> Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org It seems to be a host kernel problem. Regards, Fabrice. Brad Campbell wrote: > G'day all, > > Just wonder if anyone else is seeing this. I've not had a chance to > track it down or try to debug it yet. > > I'm running latest QEMU CVS with kqemu and the -no-tsc patch on a > vanilla 2.6.17.3 kernel with suspend2. > > The VM behaves perfectly until I do a suspend/resume of the host. When > the machine comes back, most of the time (not all the time however) it > ends up flooding my logs with this message. > > Jul 8 17:26:03 localhost kernel: [43299223.910000] rtc: lost some > interrupts at 1024Hz. > Jul 8 17:26:03 localhost kernel: [43299223.930000] rtc: lost some > interrupts at 1024Hz. > Jul 8 17:26:03 localhost kernel: [43299223.950000] rtc: lost some > interrupts at 1024Hz. > Jul 8 17:26:03 localhost kernel: [43299223.970000] rtc: lost some > interrupts at 1024Hz. > > Of course if I shutdown/reboot the VM the problem goes away. I've seen > this before but it's been a while from memory. > I'm running a vanilla 2.6.17.3 kernel in the guest booted with GRUB and > both host and guest are configured with HZ=100. > > I seem to recall mplayer does the same thing if I leave something > playing over a suspend/resume, but I've not had a chance to look at it > further. It's pretty reproducible here with qemu anyway. > > This is about the only remaining thing that is preventing me leaving > VM's up over suspend/resume now. Other than that, it's all good. > > I'll probably get to looking at it in the next couple of weeks if nobody > has any pointers. > Brad