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. ***
in kernel-2.6.18-170.el5 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 : https://bugzilla.redhat.com/show_bug.cgi?id=506967#c41 https://bugzilla.redhat.com/show_bug.cgi?id=509809#c19 https://bugzilla.redhat.com/show_bug.cgi?id=515557#c24 https://bugzilla.redhat.com/show_bug.cgi?id=524920#c10 https://bugzilla.redhat.com/show_bug.cgi?id=528310#c9
------- Comment From aliguori.com 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. http://rhn.redhat.com/errata/RHSA-2010-0178.html