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[Xen-devel] Fix "Many lost ticks" warning in ia32e guest
| To: | "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Fix "Many lost ticks" warning in ia32e guest |
| From: | "Yang, Xiaowei" <xiaowei.yang@xxxxxxxxx> |
| Date: | Mon, 10 Jul 2006 14:54:21 +0800 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Sun, 09 Jul 2006 23:54:57 -0700 |
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| Thread-index: | Acaj7au0NFIERap5RfW+XCzARVTeUQ== |
| Thread-topic: | Fix "Many lost ticks" warning in ia32e guest |
Keir, This patch fixes "Many lost ticks" warning in ia32e guest. New i8254.c code in HV has some problem calculating PIT counter. So when guest kernel reads it and uses it to adjust last_tsc when PIT is generated, it may think there are more than two ticks of time passed between 2 continuous PIT, which ended up with "Warning: Many lost ticks". Thanks, Xiaowei
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