[Bug 633978] New: NFS: soft lockup - CPU#0 stuck caused by simultaneous read/write on same file
https://bugzilla.novell.com/show_bug.cgi?id=633978 https://bugzilla.novell.com/show_bug.cgi?id=633978#c0 Summary: NFS: soft lockup - CPU#0 stuck caused by simultaneous read/write on same file Classification: openSUSE Product: openSUSE 11.3 Version: Final Platform: x86-64 OS/Version: openSUSE 11.3 Status: NEW Severity: Critical Priority: P5 - None Component: Kernel AssignedTo: kernel-maintainers@forge.provo.novell.com ReportedBy: rhg@marxmeier.com QAContact: qa@suse.de Found By: --- Blocker: --- Created an attachment (id=385013) --> (http://bugzilla.novell.com/attachment.cgi?id=385013) syslog messages after nfs soft lockup User-Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8 I have a case where a soft lockup can be always reproduced. System: HP Compaq dc5800 Microtower, Intel Core2 Duo CPU E8500 @ 3.16GHz openSUSE 11.3 x86_64, all patches applied Linux rhg-lx 2.6.34-12-default #1 SMP 2010-06-29 02:39:08 +0200 x86_64 x86_64 x86_64 GNU/Linux To reproduce, a NFS mount is necessary. Reproducible: Always Steps to Reproduce: 1) I cd to a NFS mounted directory. cd /some/nfs/mounted/directory 2) There, I do a recursive search for some text pattern with fgrep -r, such as: fgrep -r 'Some Text' . >x1 As you see, by accident I write the fgrep result to a file which is located in the same directory where I do the recursive search. This is what causes the issue. Note that the search pattern must match the text in at least some of the files located below the directory where I do the recursive search, so that something is written to the x1 file. Almost immediately, the whole X session freezes, and after a minute a soft lockup message is written to the syslog (attached, see nfs-soft-lockup.txt file). -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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Suresh Jayaraman
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Suresh Jayaraman
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Jiri Slaby
Does the attached patch fixes the problem?
If I'm looking correctly, the patch is part of 2.6.34.1. Could you Roland try a kernel from: http://download.opensuse.org/repositories/Kernel:/openSUSE-11.3/openSUSE_11.... ? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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--- Comment #4 from Suresh Jayaraman
(In reply to comment #2)
Does the attached patch fixes the problem?
If I'm looking correctly, the patch is part of 2.6.34.1. Could you Roland try a kernel from: http://download.opensuse.org/repositories/Kernel:/openSUSE-11.3/openSUSE_11.... ?
Yes, I seem to have missed the fact that this patch has made it to -stable kernel. Please report if you are able to reproduce the problem with the recent 11.3 kernels from Comment #3. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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--- Comment #5 from Roland Genske
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Roland Genske
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--- Comment #7 from Jiri Slaby
Questions: Is this kernel version safe to use in production? Is it supported, i.e., are security updates provided through YAST Online Update, given that I have included this repository in YAST?
I wouldn't use this repo on production systems. These are daily snapshots which are not qa. It was already submitted into the 11.3-test update repository, so should appear in official updates soon. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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Suresh Jayaraman
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