Re: Pending signals prevent entry to the guest

Steven Stovall
2009-01-21T23:56:00Z

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