Red Hat Bugzilla – Bug 367661
Getting Cpu stuck messages on boot up
Last modified: 2012-04-05 04:12:03 EDT
Description of problem:
When booting a RHEL 4 kernel on a Power lpar can get the message cpu x stuck.
Version-Release number of selected component (if applicable):
Linux willow.rchland.ibm.com 2.6.9-55.EL #1 SMP Fri Apr 20 16:33:09 EDT 2007
ppc64 ppc64 ppc64 GNU/Linux
Steps to Reproduce:
1. boot the first partition make sure it is up and running
2. then boot the default rhel4 kernel on the second partition
3. Once the second partition is up use 'dmesg' to see the cpu stuck message
Bug does not exist in upstream kernels.
Bug was introduced in the 2.6.9-40 RPM (rhel4.4 beta kernel)
Created attachment 248661 [details]
Revert hunk of linux-2.6.9-ppc64-rpacc.patch to use (correct) logical CPU ID
pseries_secondary_smp_init() expects to recieve logical CPUIDs, this patch
part of linux-2.6.9-ppc64-rpacc.patch mistakenly passes the hardware IDS.
Revert that hunk to put things right.
Without this patch machines where phys_id != logical_id will (at best) fail to
bring up all CPUS
This patch applies on top of CPU spinup debug/fixup patch.
Tested on a POWER4+ machine with 2 LPARS, LPAR1 has cpus 0-17, LPAR2 has cpus
18,19. Both LAPRS boot with all CPUS with patch. Without LPAR2 only ens up
with one functional CPU.
This is RH Issue 136494
After a quick look at the current 2.6.18 git tree, it does not appear this patch
is currently upstream:
A) Has it been posted for upstream inclusion (please provide lkml link or commit
# if indeed it is)
B) Should it be?
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release. Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products. This request is not yet committed for inclusion in an Update
Posted for review:
Updating PM score.
Committed in 78.7.EL . RPMS are available at http://people.redhat.com/vgoyal/rhel4/
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This has been verified by IBM. For some reason the comments on our side did not mirror over to here.
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
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