Ubuntu
kvm package

KVM: rtc lost some interrupts

Bug #179021 reported by Raphael Kraus
4
Affects Status Importance Assigned to Milestone
kvm (Ubuntu)
Invalid
Undecided
Unassigned

Bug Description

Binary package hint: kvm

When running a virtual machine with KVM /var/log/syslog continually reports the following

Dec 28 16:45:29 zardoz kernel: [ 619.115783] printk: 249 messages suppressed.
Dec 28 16:45:29 zardoz kernel: [ 619.115788] rtc: lost some interrupts at 1024Hz.

Guests OSes often run slow and/or pause.

FWIW:
# uname -a
Linux zardoz 2.6.22-14-server #1 SMP Tue Dec 18 05:52:24 UTC 2007 x86_64 GNU/Linux

According to http://kvm.qumranet.com/kvmwiki/FAQ#head-ba9cf8ea65a0023b2cba804f14b013ff556f9b3f this bug can easily be fixed.

"Try setting CONFIG_HPET_EMULATE_RTC=y in your host .config."

I have done this with success, however it means that I must use a custom kernel, which is problematic in itself.

Could CONFIG_HPET_EMULATE_RTC be included in the the standard kernel, or could a KVM version of the kernel be distributed (as with Xen).

This is a great frustration of not just mine, but many users. It would be great to see the KVM promised totally fulfilled. :)

All the best,

Raphael Kraus

Revision history for this message
Raphael Kraus (raphael-raphaelkraus) wrote :

FWIW, I'm prepared to help manage this task

Revision history for this message
Andreas Moog (ampelbein) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. You reported this bug a while ago and there hasn't been any activity in it recently. We were wondering is this still an issue for you? Can you try with latest Ubuntu release? Thanks in advance.

Changed in kvm:
assignee: nobody → andreas-moog
status: New → Incomplete
Revision history for this message
Andreas Moog (ampelbein) wrote :

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to "New". Thanks again!

Changed in kvm:
assignee: andreas-moog → nobody
status: Incomplete → Invalid
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