Bug 688669

Summary: Wrong values for pages under slab in /proc/kpagecount file
Product: Red Hat Enterprise Linux 6 Reporter: Petr Holasek <pholasek>
Component: kernelAssignee: Petr Holasek <pholasek>
Status: CLOSED WONTFIX QA Contact: Red Hat Kernel QE team <kernel-qe>
Severity: low Docs Contact:
Priority: unspecified    
Version: 6.2CC: anton, dhoward, pholasek
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2013-01-21 13:38:19 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
Upstream patch none

Description Petr Holasek 2011-03-17 16:56:00 UTC 
Created attachment 486064 [details]
Upstream patch

Description of problem:

There is a union of _mapcount value and slab structure in struct page, so /proc/kpagecount file gives wrong values for pages used by slab.

Problem was solved by this upstream commit (in attachment too):

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a6fc86d2b43bf1086557f023a24adf91db915559
Comment 2 RHEL Program Management 2011-10-07 15:26:56 UTC 
Since RHEL 6.2 External Beta has begun, and this bug remains
unresolved, it has been rejected as it is not proposed as
exception or blocker.

Red Hat invites you to ask your support representative to
propose this request, if appropriate and relevant, in the
next release of Red Hat Enterprise Linux.