From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:46638) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1R4EjJ-0001SE-Gj for qemu-devel@nongnu.org; Thu, 15 Sep 2011 12:24:02 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1R4EjI-0007rH-HG for qemu-devel@nongnu.org; Thu, 15 Sep 2011 12:24:01 -0400 Received: from hobi.com ([161.58.203.140]:41290) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1R4EjI-0007r3-Em for qemu-devel@nongnu.org; Thu, 15 Sep 2011 12:24:00 -0400 From: Rick Vernam Date: Thu, 15 Sep 2011 11:23:53 -0500 References: <20110730230157.13425.3564.malonedeb@chaenomeles.canonical.com> <20110914194209.31176.83747.malone@soybean.canonical.com> <201109141630.11577.rickv@hobi.com> In-Reply-To: <201109141630.11577.rickv@hobi.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <201109151123.53824.rickv@hobi.com> Subject: Re: [Qemu-devel] [Bug 818673] Re: virtio: trying to map MMIO memory Reply-To: rickv@hobi.com List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, Bug 818673 <818673@bugs.launchpad.net> On Wednesday 14 September 2011 16:30:11 Rick Vernam wrote: > On Wednesday 14 September 2011 14:42:09 vrozenfe wrote: > > Thank you, Rick. > > > > Could you help me to narrow this problem down? > > Absolutely. > > > As I see, you have three virtio drivers installed on your system - block, > > net, and virtio serial. Technically, anyone of them can create "trying to > > map MMIO memory" problem. The best way to find a buggy driver ( or > > drivers) will be to isolate one from the other. If you can, please try > > running only one virtio device every time to see which driver sends > > incorrect scatter/gather list element to QEMU. > > Sure, no problem. I'll have that in the next few days. I started qemu without any of the virt-serial stuff, specfically: qemu-system-x86_64 -cpu host -enable-kvm -pidfile /home/rick/qemu/hds/wxp.pid - drive file=/home/rick/qemu/hds/wxp.raw,if=virtio,aio=native -m 1536 -name WinXP -net nic,model=virtio -net user -localtime -usb -vga qxl -spice port=1234,disable-ticketing -monitor stdio It's been running for around 2 hours and no crash yet. Thanks, -Rick > > > Another question. You said, the problem happens after every second or > > third restart. Do you shutdown your VM, or just restart it? > > Have to shut down the VM guest so that the qemu process exits. > > > How does it work > > after going through several hibernate/resume, and/or suspend/resume > > cycles. > > I often will suspend with or without pausing qemu (via monitor commands > 'stop' and 'cont'). I have never experienced any problem with the qemu > process that was running prior to the suspend. > > > Best regards, > > Vadim. > > Thanks, > -Rik