Bug 480165 - RHEL 4.8 kernel rhts fs_mark test hangs
RHEL 4.8 kernel rhts fs_mark test hangs
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel (Show other bugs)
All Linux
medium Severity medium
: rc
: ---
Assigned To: Josef Bacik
Martin Jenner
Depends On:
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Reported: 2009-01-15 10:07 EST by Vivek Goyal
Modified: 2012-06-07 10:42 EDT (History)
3 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2012-06-07 10:42:15 EDT
Type: ---
Regression: ---
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Vivek Goyal 2009-01-15 10:07:22 EST
Description of problem:

fs_mark test hangs on ppc64 machine and localwatchdog hits. Looks like fs_mark is waiting for some journal commit and kjournald is waiting for some some bio transfer to finish but that bio transfer never finishes. So it could be a device driver issue or something like that.

Interesting thing is that it happens most of the time on ibm-l4b-lp1.test.redhat.com machine.


There are more instances of failure. Not listing all of them.

Version-Release number of selected component (if applicable):

How reproducible:
Saw it multitple time during various rhts runs.

Steps to Reproduce:
1. run fs_mark test on ibm-l4b-lp1.test.redhat.com
Actual results:

Expected results:

Additional info:
Comment 3 Josef Bacik 2009-01-19 11:41:39 EST
how does one get access to this box?  i have to get an objdump of jbd so i can map where we hung.  It seems to me though that this is just jbd getting hung up because its waiting for IO to happen, so its a device driver problem.  Once I can map where we're hung in do_get_write_access I can confirm thats the case, or not if its not.
Comment 4 Vivek Goyal 2009-01-19 13:04:19 EST

This machine is in rhts. You can reserve the machine and use it.
Comment 5 Josef Bacik 2009-01-27 09:16:57 EST
OK finally figured out how to get what I needed.  The hang is just us waiting on the buffer lock, so we're waiting for IO to complete.  It looks to be a problem at a lower layer, I'm not sure who would be good to assign it to for that sort of thing.
Comment 6 PaulB 2010-11-01 10:01:43 EDT

 Retesting /kernel/performance/fs_mark on ibm-l4b-lp1.test.redhat.com with kernel 2.6.9-90.EL:

 Kernel 2.6.9-90.EL installed and /kernel/performance/fs_mark was run on 
ibm-l4b-lp1.rhts.eng.rdu.redhat.com without issue 5x. The results look good.

Comment 7 Josef Bacik 2012-06-07 10:42:15 EDT
Closing out.

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