From: Carsten Otte <cotte-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
To: Jim Paris <jim-XrPbb/hENzg@public.gmane.org>
Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
Subject: Re: soft lockup after stop/cont
Date: Thu, 11 Oct 2007 11:03:52 +0200 [thread overview]
Message-ID: <470DE6F8.9090801@de.ibm.com> (raw)
In-Reply-To: <20071010185443.GA14525-lSbMZ+N7itA@public.gmane.org>
Jim Paris wrote:
> If I stop KVM in the monitor with "stop", wait a minute, and do
> "cont", a Linux guest gives me a "BUG: soft lockup detected on CPU#0".
> Is that expected behavior?
We have the same behavior on s390 when running in a virtual
environment. The issue is, that the guest physical cpu may be
scheduled away while a timer runs down. I don't think there's anything
kvm could do better regerding the soft lockup code. Soft lockup is
just broken for virtualized environments and needs to be fixed. For
the time being, just disable it in kconfig.
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next prev parent reply other threads:[~2007-10-11 9:03 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-10 8:01 soft lockup after stop/cont Jim Paris
[not found] ` <20071010080152.GA27601-lSbMZ+N7itA@public.gmane.org>
2007-10-10 8:04 ` Avi Kivity
[not found] ` <470C87AB.6050900-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-10-10 8:50 ` Dong, Eddie
[not found] ` <10EA09EFD8728347A513008B6B0DA77A023643BD-wq7ZOvIWXbNpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2007-10-10 9:09 ` Avi Kivity
[not found] ` <470C96B2.3080905-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-10-10 9:11 ` Dong, Eddie
[not found] ` <10EA09EFD8728347A513008B6B0DA77A02364404-wq7ZOvIWXbNpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2007-10-10 9:18 ` Avi Kivity
[not found] ` <470C98EB.1080602-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-10-10 9:57 ` Dong, Eddie
[not found] ` <10EA09EFD8728347A513008B6B0DA77A0236442D-wq7ZOvIWXbNpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2007-10-10 10:06 ` Avi Kivity
[not found] ` <470CA429.2080607-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-10-11 1:17 ` Dong, Eddie
2007-10-10 18:54 ` Jim Paris
[not found] ` <20071010185443.GA14525-lSbMZ+N7itA@public.gmane.org>
2007-10-11 9:03 ` Carsten Otte [this message]
[not found] ` <470DE6F8.9090801-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
2007-10-11 9:29 ` Dong, Eddie
[not found] ` <10EA09EFD8728347A513008B6B0DA77A02364AD6-wq7ZOvIWXbNpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2007-10-11 10:57 ` Carsten Otte
[not found] ` <470E01A2.104-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
2007-10-11 16:18 ` Jan Glauber1
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