Bug 516164

Summary:	RHEL 5.4 snapshot 5: ksm shows no statistics.
Product:	Red Hat Enterprise Linux 5	Reporter:	Wade Mealing <wmealing>
Component:	kvm	Assignee:	Izik Eidus <ieidus>
Status:	CLOSED NOTABUG	QA Contact:	Lawrence Lim <llim>
Severity:	medium	Docs Contact:
Priority:	low
Version:	5.4	CC:	aron.griffis, ehabkost, tao, tburke, tools-bugs, virt-maint, ykaul
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	The KSM module shipped in this release is a different version from the KSM module found on the latest upstream kernel versions. Newer features, such as exporting statistics on the /sys filesystem, that are implemented upstream are not in the version shipped in this release.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-09-29 12:18:16 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:
Bug Blocks:	468301

Description Wade Mealing 2009-08-07 05:37:18 UTC

Description of problem:

When using the ksm module, as per the LWN (http://lwn.net/Articles/328013/ ) news article, the customer believes that there should be some statistics shown for it in the /sys directory.

http://lwn.net/Articles/328013/

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

How reproducible:

Every time.

Steps to Reproduce:
1. modprobe ksm 
2. find -iname ksm*
3. wait.
  
Actual results:

No files found.

Expected results:

Tunables/statics reported as per the LWN document.

Additional info:

This problem was visible in 5.4 snap5.

Comment 3 Eduardo Habkost 2009-08-19 20:01:06 UTC

Changing component to kvm, where the ksm module is shipped.

Comment 4 Izik Eidus 2009-08-19 21:12:51 UTC

The version of ksm inside rhel 5.4 doesnt show statistics...
it is little bit diffrent version than what the mainline have
and does not have sysfs support...


Is this a really bug after all?

Comment 5 Eduardo Habkost 2009-08-19 21:18:05 UTC

(In reply to comment #4)
> 
> Is this a really bug after all?  

Not necessarily. It was reported so it can be at least documented in case the users refer to the upstream KSM guide.

Comment 6 Eduardo Habkost 2009-08-19 21:20:43 UTC

Release note added. If any revisions are required, please set the 
"requires_release_notes" flag to "?" and edit the "Release Notes" field accordingly.
All revisions will be proofread by the Engineering Content Services team.

New Contents:
The shipped version of the KSM module is a different version from the KSM module found on the latest upstream kernel versions. It doesn't have some features, such as exporting statistics on the /sys filesystem.

Comment 7 Izik Eidus 2009-08-19 22:10:23 UTC

Wade, btw if customer want to see the sharing, he can run top and see the SHR feild...

Comment 8 Wade Mealing 2009-08-20 01:29:48 UTC

Thanks Ezik,

Will relay this to them.

Comment 10 Ryan Lerch 2009-08-27 01:35:32 UTC

Release note updated. If any revisions are required, please set the 
"requires_release_notes"  flag to "?" and edit the "Release Notes" field accordingly.
All revisions will be proofread by the Engineering Content Services team.

Diffed Contents:
@@ -1 +1 @@
-The shipped version of the KSM module is a different version from the KSM module found on the latest upstream kernel versions. It doesn't have some features, such as exporting statistics on the /sys filesystem.+The KSM module shipped in this release is a different version from the KSM module found on the latest upstream kernel versions. Newer features, such as exporting statistics on the /sys filesystem, that are implemented upstream are not in the version shipped in this release.

Comment 11 Dor Laor 2009-09-29 12:18:16 UTC

So I'm closing this issue (see comment #7,8)