Red Hat Bugzilla – Bug 483161
Ensure that 'noac' and/or 'actimeo=0' turn off attribute caching
Last modified: 2011-02-18 09:30:57 EST
Description of problem:
There is a window where the nfs attribute actimeo=0 behaves like
Version-Release number of selected component (if applicable):
RHEL 5.2 effected, RHEL 5.3 is patched.
Oracle Enterprise Linux 5.2 kernel-2.6.18-22.214.171.124.2.el5 and newer include
100% with C testcase. Cannot reproduce with an Oracle database, and from
testing it does not cause database crashes.
Steps to Reproduce:
1. Setup 2 node rac with nfs mounted actimeo=0
2. Run testcase
3. Get failure
Filesize across cluster nodes not consistent.
No caching of file attributes.
This is identical to BZ 446083.
Created attachment 330407 [details]
RHEL 5.2 patch
Clarification of the kernel versions:
kernel-2.6.18-128 is RHEL 5.3 and already has the patch.
kernel-2.6.18-92.1.22 is RHEL 5.2 and does not include the patch.
kernel-2.6.18-126.96.36.199.1 is OEL 5.2 and does include the patch.
This BZ is filed to get this added to the next RHEL 5.2 errata.
Jiri, this is a request to have a patch added by Peter Staubach to RHEL5.3 also added to RHEL5.2 z-stream.
When can we expect the fix for this bug to be available in a released kernel?
Comment #2 above states:
kernel-2.6.18-128 is RHEL 5.3 and already has the patch
They used another BZ to close it in 5.3:
450184 - Ensure that 'noac' and/or 'actimeo=0' turn off attribute caching
At the time I filed this bug, 5.2 was still active, hence my request to include it in a 5.2 errata.. which never happened but there is no need since 5.3+ has
the fix now.
Great, thanks John!
(In reply to comment #6)
> At the time I filed this bug, 5.2 was still active, hence my request to include
> it in a 5.2 errata.. which never happened but there is no need since 5.3+ has
> the fix now.
Being that maintenance of RHEL5.2 has been deactivated, it is no longer possible to backport the requested patch. So I'm closing this bug as CANTFIX. But as was mentioned, the requested patch is in RHEL5.3 and following.