From: changlimin <changlimin@h3c.com>
To: Mulyadi Santosa <mulyadi.santosa@gmail.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Sometimes qem-kvm hang at kvm_put_vcpu_events when virsh restore. Both version 0.12.5 / 0.13.0
Date: Wed, 15 Dec 2010 16:45:14 +0800 [thread overview]
Message-ID: <99964DAE2E034CA48DC1F3A99A380413@c00148h> (raw)
In-Reply-To: AANLkTikFBij8fDM5bFo4UCz-mjgeLWkcbdfP389yWrBw@mail.gmail.com
I have tried 1 vcpu and 2 vcpus, both sometimes restore fail.
----- Original Message -----
From: "Mulyadi Santosa" <mulyadi.santosa@gmail.com>
To: "changlimin" <changlimin@h3c.com>
Cc: <qemu-devel@nongnu.org>
Sent: Wednesday, December 15, 2010 4:31 PM
Subject: Re: [Qemu-devel] Sometimes qem-kvm hang at kvm_put_vcpu_events when virsh restore. Both version 0.12.5 / 0.13.0
On Wed, Dec 15, 2010 at 15:08, changlimin <changlimin@h3c.com> wrote:
> 1. I create a guest use libvirt;
> 2. I start the guest use: virsh start guest;
> 3. I save the guest to a file, use: virsh save guest guest.save
> 4. I retore the guest, use : virsh retore guest.save
> Sometimes, the guest restore successful. sometimes restore fail.
> I debug the code, the qemu-kvm hang at kvm_put_vcpu_events, the process state is D, uninterruptable sleep. Only can killed by kill -9.
> I print the events when kvm_put_vcpu_events / kvm_get_vcpu_events, it is always different, event when restore successful
I could only say, i smell deadlock due to race condition here...but I
have no further prove...how many (virtual) CPU did you simulate at
that time?
--
regards,
Mulyadi Santosa
Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com
prev parent reply other threads:[~2010-12-15 8:45 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-15 7:38 [Qemu-devel] Sometimes qem-kvm hang at kvm_put_vcpu_events when virsh restore. Both version 0.12.5 / 0.13.0 changlimin
2010-12-15 7:46 ` Mulyadi Santosa
2010-12-15 8:08 ` changlimin
2010-12-15 8:31 ` Mulyadi Santosa
2010-12-15 8:45 ` changlimin [this message]
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