Re: Pending signals prevent entry to the guest

Dor Laor
2009-01-22T00:14:14Z

> Can you please explain why dyn or rtc are not the right alarm_timers? My host is linux-2.6.24.
>
Both options should be fine. I asked for cmd line and kvm_stat output.
> ----- Original Message -----
> From: "Dor Laor" <dlaor@redhat.com>
> To: "Steven Stovall" <sstovall@neuraliq.com>
> Cc: "kvm" <kvm@vger.kernel.org>
> Sent: Wednesday, January 21, 2009 12:05:37 AM GMT -08:00 US/Canada Pacific
> Subject: Re: Pending signals prevent entry to the guest
>
> Steven Stovall wrote:
>
>> I posted about a week ago regarding a very different behavior with a host-side app vis a vis kvm-77 vs kvm-33. Pending signals (SIGIO and SIGALRM) never seem to be dequeued so that I never kvm_guest_enter()...it appears that only the dynticks alarm_timer gets enabled which only handles SIGALRM, while the rtc alarm_timer which handles SIGIO does not. I have tried to make sure both are enabled, but I still have perpetual pending signals...is this possible?? Or is there some corruption somewhere?
>>
>>
> How many signal_exits do you see on kvm_stat?
> What's your host kernel version?
> It wasn't clean if you use dyn tick or rtc clock in qemu. Please post
> the command line.
>
>> Steven
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