Event posted on 01-11-2010 12:45pm CST by daahern

Description of problem:
'rmmod usbnet' hangs

How reproducible:
reproducible on demand for an x3650M2 with an IMM

Steps to Reproduce:
Login and run 'rmmod usbnet'

Actual results:
rmmod hangs, spinning at 100% cpu

Expected results:
rmmod unloads usbnet module and exits

Additional info:
repeatable with a KVM hosted VM as well. Add a usb net device, login to VM and run rmmod usbnet.
This event sent from IssueTracker by streeter  [SEG - Kernel]
 issue 386773

Event posted on 01-18-2010 10:03pm CST by daahern

Max Asbock with IBM verified the following patch addresses the problem:
http://lkml.indiana.edu/hypermail/linux/kernel/0505.0/0855.html

netdump with the x3650M2's is broken, so I cannot acquire a vmcore. It
requires the patch mentioned in another issue tracker case. As I
understand it Red Hat has an x3650M2, so you should be able to verify it
on that server.

David Ahern



Internal Status set to 'Waiting on Support'
Status set to: Waiting on Tech

This event sent from IssueTracker by streeter  [SEG - Kernel]
 issue 386773

Event posted on 02-01-2010 10:22am CST by rprice

**NOTES**

I have a reproducer setup at root@ibm-x3650m2-1.gsslab.rdu.redhat.com.

Removing the 'usbnet' module will cause the CPU to pike at 100% but you
can still ssh into the machine.


This event sent from IssueTracker by streeter  [SEG - Kernel]
 issue 386773

upstream commit is b2d84f078a8be40f5ae3b4d2ac001e2a7f45fe4f

Created attachment 394631 [details]
RHEL4 fix for this issue

Committed in 89.25.EL . RPMS are available at http://people.redhat.com/vgoyal/rhel4/

Confirm the patch on kernel 2.6.9-89.25.EL.
No hardware.
Setting SanityOnly.

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-2011-0263.html