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From: | Fabrice Bellard |
Subject: | Re: [Qemu-devel] rtc: lost some interrupts at 1024Hz. |
Date: | Mon, 10 Jul 2006 22:45:08 +0200 |
User-agent: | Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.3) Gecko/20040913 |
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
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