Bug 466427

Summary: Significant regression in time() performance
Product: Red Hat Enterprise Linux 5 Reporter: RHEL Program Management <pm-rhel>
Component: kernelAssignee: Jiri Pirko <jpirko>
Status: CLOSED ERRATA QA Contact: Martin Jenner <mjenner>
Severity: high Docs Contact:
Priority: urgent    
Version: 5.3CC: ahecox, dhoward, dzickus, james.leddy, jburke, jpirko, jplans, jturner, pm-eus, prarit, rkhan
Target Milestone: rcKeywords: Regression, Reopened, ZStream
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2008-11-04 10:29:54 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 461184    
Bug Blocks:    

Description RHEL Program Management 2008-10-10 08:08:02 UTC
This bug has been copied from bug #461184 and has been proposed
to be backported to 5.2 z-stream (EUS).

Comment 2 RHEL Program Management 2008-10-10 08:39:57 UTC
This bugzilla has Keywords: Regression.  

Since no regressions are allowed between releases, 
it is also being proposed as a blocker for this release.  

Please resolve ASAP.

Comment 3 Jay Turner 2008-10-10 10:36:44 UTC
Guys, I'm a little confused why this fix is being proposed for z-stream.  The change which caused the problem was introduced into the 2.6.18-98.el5 kernel (i.e. well after the z-stream kernel.)  There's nothing to "fix" in the 92.1.13.el5 kernel.

Comment 4 Jiri Skrabal 2008-10-10 11:21:41 UTC
Jay, thanks for clarification. Closing the bug.

Comment 5 Jiri Pirko 2008-10-10 15:24:20 UTC
Jay, we need this patch to correct the bug previously done by linux-2.6-x86_64-gettimeofday-fixes-for-hpet-pmtimer-tsc.patch (bz250708). So basically we will bring the bug with mentioned patch and we will fix it by this in the same build. I think it's the best way to solve this issue.

Comment 6 Don Howard 2008-10-10 15:30:18 UTC
Hi Jiri, Jay -

This is related to bz 462860 (5.2.z).  We need both patches together.

Comment 7 Jay Turner 2008-10-10 16:39:44 UTC
OK, now I understand.  Just didn't want people doing needless work.

Comment 8 Jiri Pirko 2008-10-13 13:50:42 UTC
in kernel-2.6.18-92.1.15.el5

you can download RPMs from http://people.redhat.com/jpirko/.el52z/92.1.15/

Comment 12 errata-xmlrpc 2008-11-04 10:29:54 UTC
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 therefore 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.

http://rhn.redhat.com/errata/RHSA-2008-0957.html