From: Avi Kivity <avi@redhat.com>
To: Eric B Munson <emunson@mgebm.net>
Cc: mingo@redhat.com, hpa@zytor.com, arnd@arndb.de,
ryanh@linux.vnet.ibm.com, aliguori@us.ibm.com,
mtosatti@redhat.com, jeremy.fitzhardinge@citrix.com,
levinsasha928@gmail.com, Jan Kiszka <jan.kiszka@siemens.com>,
kvm@vger.kernel.org, linux-arch@vger.kernel.org, x86@kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/5 V5] Avoid soft lockup message when KVM is stopped by host
Date: Thu, 15 Dec 2011 11:48:36 +0200 [thread overview]
Message-ID: <4EE9C274.3030603@redhat.com> (raw)
In-Reply-To: <20111214175844.GD4075@mgebm.net>
On 12/14/2011 07:58 PM, Eric B Munson wrote:
> > I don't think you should see a guest softlockup if the host is
> > overloaded. Nor should you see it due to a long live migration pause,
> > or STOP/CONT. You should see a guest softlockup if it is spinning due
> > to a guest bug, and not for any other reason.
> >
> > I think we need a mix of the ioctl (for STOP/CONT and voluntary pauses,
> > like live migration or qemu stop/cont) and preempt notifiers (together
> > with a check for TASK_RUNNING/TASK_UNINTERRUPTIBLE, for scheduling or
> > swap delays)
> >
>
> Do you want the preemption notifier work in before you will consider merging
> this set, or can that be a follow on?
Yes please.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2011-12-15 9:48 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-05 20:18 [PATCH 0/5 V5] Avoid soft lockup message when KVM is stopped by host Eric B Munson
2011-12-05 20:19 ` [PATCH 1/5 V5] Add flag to indicate that a vm was stopped by the host Eric B Munson
2011-12-05 20:19 ` [PATCH 2/5 V5] Add functions to check if the host has stopped the vm Eric B Munson
2011-12-07 14:31 ` Avi Kivity
2011-12-08 15:23 ` Eric B Munson
2011-12-14 12:11 ` Marcelo Tosatti
2011-12-14 14:37 ` Avi Kivity
2011-12-14 17:11 ` Eric B Munson
2011-12-14 17:30 ` Avi Kivity
2011-12-14 17:57 ` Eric B Munson
2011-12-05 20:19 ` [PATCH 3/5 V5] Add ioctl for KVMCLOCK_GUEST_STOPPED Eric B Munson
2011-12-07 14:34 ` Avi Kivity
2011-12-08 15:25 ` Eric B Munson
2011-12-05 20:19 ` [PATCH 4/5 V5] Add generic stubs for kvm stop check functions Eric B Munson
2011-12-07 14:36 ` Avi Kivity
2011-12-08 15:27 ` Eric B Munson
2011-12-05 20:19 ` [PATCH 5/5 V5] Add check for suspended vm in softlockup detector Eric B Munson
2011-12-07 14:38 ` Avi Kivity
2011-12-07 14:41 ` [PATCH 0/5 V5] Avoid soft lockup message when KVM is stopped by host Avi Kivity
2011-12-08 15:19 ` Eric B Munson
2011-12-14 15:08 ` Avi Kivity
2011-12-14 17:58 ` Eric B Munson
2011-12-15 9:48 ` Avi Kivity [this message]
2011-12-15 18:53 ` Eric B Munson
2011-12-19 13:01 ` Avi Kivity
2011-12-11 12:40 ` Dor Laor
2011-12-14 12:18 ` Marcelo Tosatti
2011-12-14 12:16 ` Marcelo Tosatti
2011-12-14 14:39 ` Avi Kivity
2011-12-14 14:49 ` Anthony Liguori
2011-12-14 15:01 ` Avi Kivity
2011-12-14 14:54 ` Eric B Munson
2011-12-14 18:21 ` Marcelo Tosatti
2011-12-15 10:21 ` Avi Kivity
2011-12-16 9:31 ` Marcelo Tosatti
2011-12-19 12:59 ` Avi Kivity
2011-12-19 16:11 ` Marcelo Tosatti
2011-12-19 17:50 ` Marcelo Tosatti
2011-12-22 9:59 ` Avi Kivity
2011-12-08 11:34 ` Amit Shah
2011-12-15 11:55 ` Avi Kivity
2011-12-19 12:52 ` Amit Shah
2011-12-19 12:59 ` Avi Kivity
2011-12-19 17:59 ` Amit Shah
2011-12-22 9:18 ` Dor Laor
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