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Bug 713463

Summary:	UV: fscache taints kernel; NFS requires fscache; NFS taints kernel
Product:	Red Hat Enterprise Linux 6	Reporter:	RHEL Program Management <pm-rhel>
Component:	kernel	Assignee:	Frantisek Hrbata <fhrbata>
Status:	CLOSED ERRATA	QA Contact:	Red Hat Kernel QE team <kernel-qe>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	6.2	CC:	dcleal, dhoward, dhowells, dwa, gbeshers, gbeshers, jlayton, jwest, kzhang, martinez, pm-eus, randerso, rja, rwheeler, sprabhu, steved, tee
Target Milestone:	rc	Keywords:	Regression, ZStream
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	kernel-2.6.32-131.13.1.el6	Doc Type:	Bug Fix
Doc Text:	Prior to this update, loading the FS-Cache kernel module would cause the kernel to be tainted as a Technology Preview via the mark_tech_preview() function, which would cause kernel lock debugging to be disabled by the add_taint() function. However, the NFS and CIFS modules depend on the FS-Cache module so using either NFS or CIFS would cause the FS-Cache module to be loaded and the kernel tainted. With this update, FS-Cache only taints the kernel when a cache is brought online (for instance by starting the cachefilesd service) and, additionally, the add_taint() function has been modified so that it does not disable lock debugging for informational-only taints.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-10-05 21:48:58 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:	696396, 1020718
Bug Blocks:

Description RHEL Program Management 2011-06-15 13:40:15 UTC

This bug has been copied from bug #696396 and has been proposed
to be backported to 6.1 z-stream (EUS).

Comment 9 errata-xmlrpc 2011-10-05 21:48:58 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2011-1350.html

Comment 10 Martin Prpič 2011-10-06 13:38:32 UTC

    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
Prior to this update, loading the FS-Cache kernel module would cause the kernel to be tainted as a Technology Preview via the mark_tech_preview() function, which would cause kernel lock debugging to be disabled by the add_taint() function. However, the NFS and CIFS modules depend on the FS-Cache module so using either NFS or CIFS would cause the FS-Cache module to be loaded and the kernel tainted. With this update, FS-Cache only taints the kernel when a cache is brought online (for instance by starting the cachefilesd service) and, additionally, the add_taint() function has been modified so that it does not disable lock debugging for informational-only taints.