* Pending signals prevent entry to the guest
[not found] <891339.34601232509246126.JavaMail.root@mailserv1>
@ 2009-01-21 4:09 ` Steven Stovall
2009-01-21 8:05 ` Dor Laor
2009-01-21 8:49 ` Avi Kivity
0 siblings, 2 replies; 6+ messages in thread
From: Steven Stovall @ 2009-01-21 4:09 UTC (permalink / raw)
To: kvm
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?
Steven
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: Pending signals prevent entry to the guest
2009-01-21 4:09 ` Pending signals prevent entry to the guest Steven Stovall
@ 2009-01-21 8:05 ` Dor Laor
2009-01-21 8:49 ` Avi Kivity
1 sibling, 0 replies; 6+ messages in thread
From: Dor Laor @ 2009-01-21 8:05 UTC (permalink / raw)
To: Steven Stovall; +Cc: kvm
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
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Pending signals prevent entry to the guest
2009-01-21 4:09 ` Pending signals prevent entry to the guest Steven Stovall
2009-01-21 8:05 ` Dor Laor
@ 2009-01-21 8:49 ` Avi Kivity
1 sibling, 0 replies; 6+ messages in thread
From: Avi Kivity @ 2009-01-21 8:49 UTC (permalink / raw)
To: Steven Stovall; +Cc: kvm
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?
>
You must call sigtimedwait() or one of its friends with the pending
signal enabled after KVM_VCPU_RUN exits with -EINTR.
--
error compiling committee.c: too many arguments to function
^ permalink raw reply [flat|nested] 6+ messages in thread
[parent not found: <15896857.36841232581961353.JavaMail.root@mailserv1>]
* Re: Pending signals prevent entry to the guest
[not found] <15896857.36841232581961353.JavaMail.root@mailserv1>
@ 2009-01-21 23:53 ` Steven Stovall
2009-01-22 0:14 ` Dor Laor
0 siblings, 1 reply; 6+ messages in thread
From: Steven Stovall @ 2009-01-21 23:53 UTC (permalink / raw)
To: kvm
Can you please explain why dyn or rtc are not the right alarm_timers? My host is linux-2.6.24.
----- 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
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: Pending signals prevent entry to the guest
2009-01-21 23:53 ` Steven Stovall
@ 2009-01-22 0:14 ` Dor Laor
2009-01-24 1:50 ` Steven Stovall
0 siblings, 1 reply; 6+ messages in thread
From: Dor Laor @ 2009-01-22 0:14 UTC (permalink / raw)
To: Steven Stovall; +Cc: kvm
Steven Stovall wrote:
> 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
>> --
>> To unsubscribe from this list: send the line "unsubscribe kvm" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>>
>>
>
>
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Pending signals prevent entry to the guest
2009-01-22 0:14 ` Dor Laor
@ 2009-01-24 1:50 ` Steven Stovall
0 siblings, 0 replies; 6+ messages in thread
From: Steven Stovall @ 2009-01-24 1:50 UTC (permalink / raw)
To: kvm
Thanks for the feedback. My problem turned out to be a mere misconfiguration propagated by a dubious provenance :-)
Steven
----- 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 4:14:32 PM GMT -08:00 US/Canada Pacific
Subject: Re: Pending signals prevent entry to the guest
Steven Stovall wrote:
> 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
>> --
>> To unsubscribe from this list: send the line "unsubscribe kvm" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>>
>>
>
>
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
^ permalink raw reply [flat|nested] 6+ messages in thread
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2009-01-21 4:09 ` Pending signals prevent entry to the guest Steven Stovall
2009-01-21 8:05 ` Dor Laor
2009-01-21 8:49 ` Avi Kivity
[not found] <15896857.36841232581961353.JavaMail.root@mailserv1>
2009-01-21 23:53 ` Steven Stovall
2009-01-22 0:14 ` Dor Laor
2009-01-24 1:50 ` Steven Stovall
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