Re: [kvm-devel] [BUG] Oops with KVM-27

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 6/11/07, Avi Kivity <[email protected]> wrote:
Luca wrote:
>>
>> I've managed to reproduce this on kvm-21 (it takes many boots for this
>> to happen, but it does eventually).
>
> Hum, any clue on the cause?

 From what I've seen, it's the new Linux clocksource code.

Actually I tried forcing the PIT (and any other combination of
tsc,acpi_pm,jiffies) as the clocksource, without success.

> Should I test older versions?

They're unlikely to be better.  Instead, it would be best to see what
the guest is doing.

I suggest downloading the source rpm for the kernel, building it, and
sprinkling printk()s until we know exactly what source the guest is
executing at the time of the hang.

Ok, will do. Meanwhile I discovered that the kernel on the boot cd
(the one that hangs) is compiled for i586, while the one installed on
disk is for i686 (this one works).

i686 has this options enabled:

+CONFIG_X86_GOOD_APIC=y
+CONFIG_X86_USE_PPRO_CHECKSUM=y
+CONFIG_X86_TSC=y

but disabling tsc on the command line doesn't make any difference. Is
it possible that KVM is choking on some instruction not used by the
i686 kernel?

Luca
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux