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Bug 431232 - Xen BUG at io_apic.c:127
Xen BUG at io_apic.c:127
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel-xen (Show other bugs)
x86_64 Linux
low Severity urgent
: rc
: ---
Assigned To: Xen Maintainance List
Martin Jenner
Depends On:
  Show dependency treegraph
Reported: 2008-02-01 11:48 EST by Tim McCarthy
Modified: 2010-11-09 08:34 EST (History)
1 user (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2009-11-24 16:37:21 EST
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
serial output of XEN bug (8.63 KB, text/plain)
2008-02-01 11:48 EST, Tim McCarthy
no flags Details
Good boot on same machine (7.15 KB, text/plain)
2008-02-01 12:03 EST, Tim McCarthy
no flags Details

  None (edit)
Description Tim McCarthy 2008-02-01 11:48:48 EST
Description of problem:
During some reboots, the OS fails to boot with a bug at io_api,c:127

Version-Release number of selected component (if applicable):
xen 3.1.0-53.1.6el5
This is an Intel S5000PSL board with two Quad-Core E5345 CPUs, 16GB of RAM and a
Seagate 250GB SATA disk.

How reproducible:
Not reproducible. When the problem happens though, the only workaround has been
to boot a non-xen kernel (like PXE boot and start a kernel off the net)

Steps to Reproduce:
1. Cannot reproduce. many reboots may be needed
Actual results:

Expected results:

Additional info:
Comment 1 Tim McCarthy 2008-02-01 11:48:48 EST
Created attachment 293748 [details]
serial output of XEN bug
Comment 2 Tim McCarthy 2008-02-01 12:03:56 EST
Created attachment 293749 [details]
Good boot on same machine

This is a good boot from the same machine in case a reference point is
Comment 3 Chris Lalancette 2008-02-26 23:17:55 EST
Yes, I've seen this from time-to-time as well, although I've never been able to
reproduce it either.  It hits the BUG() in io_apic.c:127 basically when it
thinks we are trying to remove a irq_2_pin mapping that wasn't added in the
first place.  I don't have much more than this at the moment.

Chris Lalancette
Comment 4 Chris Lalancette 2009-10-22 11:23:05 EDT
I'm sorry nobody has looked at this in a while.  Is this still a problem with recent RHEL-5.4 Xen?  I haven't seen it in over a year myself, so I'm just wondering if you still see the problem.

Chris Lalancette
Comment 5 Chris Lalancette 2009-11-24 16:37:21 EST
No response in over a month, and I haven't seen this myself in a long time.  I'm going to close this as CURRENTRELEASE for now; if it pops back up, feel free to re-open.

Chris Lalancette
Comment 8 Chris Lalancette 2010-07-19 09:52:17 EDT
Clearing out old flags for reporting purposes.

Chris Lalancette

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