Bug 431619

Summary:	2.6.18-53.1.6.el5 has really bad NFS performance compared to 2.6.18-53.1.4.el5 or previous RHEL5 kernels
Product:	Red Hat Enterprise Linux 5	Reporter:	csb sysadmin <admin>
Component:	kernel	Assignee:	Red Hat Kernel Manager <kernel-mgr>
Status:	CLOSED DUPLICATE	QA Contact:	Martin Jenner <mjenner>
Severity:	urgent	Docs Contact:
Priority:	low
Version:	5.1	CC:	herrold
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2008-02-06 02:01:14 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:

Description csb sysadmin 2008-02-05 22:48:26 UTC

Description of problem:

Starting programs that are on an NFS (auto)mount or sourcing shell scripts that
are on an NFS (auto)mount take a very long time with the 2.6.18-53.1.6.el5
kernel. Downgrading to 2.6.18-53.1.4.el5 or any previous RHEL5 kernel fixes the
problem

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

kernel-2.6.18-53.1.4.el5

How reproducible:

every time

Steps to Reproduce:
1. Upgrade to kernel-2.6.18-53.1.6.el5
2. Time to open shells (user home dirs on NFS mounts) or open applications
residing on NFS mounts take a very long time.
3. Downgrading to kernel-2.6.18-53.1.4.el5 or kernel-2.6.18-8.el5 fixes the problem.
  
Actual results:

NFS performance is very slow

Expected results:

NFS performance should be same as or better than previous RHEL5 kernels.

Additional info:

Comment 1 csb sysadmin 2008-02-05 22:52:20 UTC

> Version-Release number of selected component (if applicable):
> kernel-2.6.18-53.1.4.el5

^^^^ typo should be kernel-2.6.18-53.1.6.el5

Comment 2 Jeff Layton 2008-02-06 02:01:14 UTC


*** This bug has been marked as a duplicate of 431092 ***