Red Hat Bugzilla – Bug 510814
CPU hotplug notifiers for KVM (for suspend and cpu hotplug support)
Last modified: 2013-01-09 16:46:55 EST
In order to support suspend-to-disk and suspend-to-RAM while using KVM, additions are needed on the kernel CPU hotplug support. This patch in special: http://lkml.org/lkml/2007/5/24/108
From the patch description:
"KVM wants a notification when a cpu is about to die, so it can disable
hardware extensions, but at a time when user processes cannot be scheduled
on the cpu, so it doesn't try to use virtualization extensions after they
have been disabled."
*** Bug 514912 has been marked as a duplicate of this bug. ***
*** Bug 515112 has been marked as a duplicate of this bug. ***
You can download this test kernel from http://people.redhat.com/dzickus/el5
Please do NOT transition this bugzilla state to VERIFIED until our QE team
has sent specific instructions indicating when to do so. However feel free
to provide a comment indicating that this fix has been verified.
on kernel-2.6.18-170.el5. host s3/s4 cpu online/offline works fine
on kernel-2.6.18-185.el5. host cpu online/offline works fine, but s3/s4 failed due to an another kernel bug 550014.
related test can be found in :
------- Comment From firstname.lastname@example.org 2010-02-17 21:17 EDT-------
From LTC BZ #54637 Comment #13:
"I verified that the issue is fixed on an x3200 M2 running the
RHEL5.5 beta 2.6.18-186.el5 kernel. Closing."
Marking as VERIFIED.
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.