Messages in this thread | | | From | Andi Kleen <> | Subject | Re: lguest rebroken in 2.6.22-rc3-mm1 | Date | Mon, 4 Jun 2007 20:12:15 +0200 |
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> > > > Looks like this one got lost in rc3-mm1. > > Andi said that he fixed the zero-divide by other means?
I determined it cannot happen in my source tree. When notsc is passed TSC CPUID is cleared and sched-clock works.
I suspect what happens is that lguest forgets to clear the TSC cpuid bit when it disables TSC. Then the TSC frequency doesn't get computed and sched-clock can divide by zero.That's purely a lguest bug that needs to be fixed in lguest with a clear_bit(X86_FEATURE_TSC, &boot_cpu_data.x86_capability) somewhere
-Andi
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