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xen-devel
[Xen-devel] Re: Genapic testing
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To: |
"Puthiyaparambil, Aravindh" <aravindh.puthiyaparambil@xxxxxxxxxx> |
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Subject: |
[Xen-devel] Re: Genapic testing |
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From: |
Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
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Date: |
Thu, 26 May 2005 19:09:26 +0100 |
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Cc: |
xen-devel@xxxxxxxxxxxxxxxxxxx, "Davis, Jason" <jason.davis@xxxxxxxxxx>, "Vessey, Bruce A" <Bruce.Vessey@xxxxxxxxxx>, "Subrahmanian, Raj" <raj.subrahmanian@xxxxxxxxxx> |
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Thu, 26 May 2005 18:05:06 +0000 |
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On 26 May 2005, at 18:54, Puthiyaparambil, Aravindh wrote:
Dom0 is UP. It does not complete booting. It loops infinitely on the
"Time went backwards" message. The boot does not continue from that
point on. I am attaching the boot output.
If IRQ0 does not get through then won't check_timer() in io_apic.c
fail?
That seems to be working which indicates that IRQ0 is indeed getting
through.
Are the TSCs on all CPUs suitably sync'ed up? If the PIT is firing and
we are updating our timestamp info often enough, and all CPUs have
similar TSC values, then all should work okay. Don Fry has a patch that
handles unsync'ed TSCs, if that turns out to be the problem.
-- Keir
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