Bug 127078 - nfs o_direct hangs unexpectedly in read
nfs o_direct hangs unexpectedly in read
Status: CLOSED WONTFIX
Product: Red Hat Enterprise Linux 2.1
Classification: Red Hat
Component: kernel (Show other bugs)
2.1
i686 Linux
medium Severity medium
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Assigned To: Jason Baron
Brian Brock
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Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2004-07-01 13:50 EDT by Jason Baron
Modified: 2013-03-06 00:57 EST (History)
2 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Environment:
Last Closed: 2007-03-29 13:56:38 EDT
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CRM:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:


Attachments (Terms of Use)
here is the file that we failed to read, and /var/log/messages from the client box w/alt-syrq-t output, the hanging process is the 'cat' (377.71 KB, text/plain)
2004-07-01 13:56 EDT, Jason Baron
no flags Details
A SysRq of the hang I'm seeing (18.19 KB, text/plain)
2004-07-02 09:53 EDT, Steve Dickson
no flags Details

  None (edit)
Description Jason Baron 2004-07-01 13:50:19 EDT
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4.2)
Gecko/20040304

Description of problem:
While simpley 'cat' of files mounted with the 'noac' option, and nfs
loaded with the module parameter, nfs_uncache_io=1, some file reads
unexpected hang in read. 

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


How reproducible:
Always

Steps to Reproduce:
1. mount -o noac dhcp64-180:/tmp /tmp/pro/mnt/tmp/
2. cd /tmp/pro/mnt/tmp/
3. cat war-e.43-e.44 

    

Actual Results:  hang in read

Expected Results:  no hand

Additional info:

I'm attaching the file, 'war-e.43-e.44' that the read failed on in
case there is sumething special about it, i've also got alt-sysrq-t at
the time of the hang. This also does not appear to be a regression,
although initial reproduced on the U5 beta candidate e.46, i've also
reproduced thsi issue on e.40, and e.41.
Comment 1 Jason Baron 2004-07-01 13:56:30 EDT
Created attachment 101566 [details]
here is the file that we failed to read, and /var/log/messages from the client box w/alt-syrq-t output, the hanging process is the 'cat'
Comment 2 Steve Dickson 2004-07-02 09:53:35 EDT
Created attachment 101598 [details]
A SysRq of the hang I'm seeing
Comment 3 Jason Baron 2007-03-29 13:56:38 EDT
rhel2.1 is only accepting security/data corruption fixes at this point. closing.

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