Red Hat Bugzilla – Bug 428338
[NetApp-S 5.2 bug] RHEL 5.1 root device multipathed host freezes during FCP path faults
Last modified: 2010-01-11 21:40:19 EST
This bug has been copied from bug #355961 and has been proposed
to be backported to 5.1 z-stream (EUS).
This fix has been backported.
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 the 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.
I installed the updated device-mapper-multipath package i.e.
device-mapper-multipath-0.4.7-12.el5_1.2 on my RHEL 5.1 root device multipathed
host and rebooted, but the host freeze is still reproducible during faults. As
suggested by Kiyoshi, I ran the attached script i.e. test.sh to trigger the
freeze (the freeze is also reproducible while running FC path faults on the SAN
I don't see any prio callout binaries in /var/cache/multipathd/ (if that was
intended in the fix). The sysrq dumps (taken 10 minutes apart) seem to show both
multipathd & bash stalling on the exec system call (similar to the original case).
Created attachment 293642 [details]
The attachment contains the following:
1) Config.txt - Config info of the RHEL 5.1 root device multipathed host.
2) test.sh - Script to simulate path faults.
3) msg-Jan31 - /var/log/messages
4) rhel5-1-dumps-Jan31.TXT - Sysrq dumps (taken 10 minutes apart) during the
Martin, please open a new bugzilla (clone this one) since this is marked closed
Can you try switching the priority callout in /etc/multipath.conf to
prio_callout "/sbin/mpath_prio_netapp.static /dev/%n"
This is just a static version of the regular callout. I reproduced this on my
machine, and it was caused by trying to read /lib/ld-linux.so.2 when the
filesystem is hung.
the RHEL5.2 release notes will be dropped to translation on April 15, 2008, at
which point no further additions or revisions will be entertained.
a mockup of the RHEL5.2 release notes can be viewed at the following link:
please use the aforementioned link to verify if your bugzilla is already in the
release notes (if it needs to be). each item in the release notes contains a
link to its original bug; as such, you can search through the release notes by