Bug 617199 – make exclusively owned pages belong to the local anon_vma on swapin

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Bug 617199 - make exclusively owned pages belong to the local anon_vma on swapin

Summary:	make exclusively owned pages belong to the local anon_vma on swapin

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 6
Classification:	Red Hat
Component:	kernel (Show other bugs)
Sub Component:
Version:	6.1
Hardware:	All Linux

Priority	low Severity medium
Target Milestone:	rc
Target Release:	6.1
Assigned To:	Rik van Riel
QA Contact:	Caspar Zhang
Docs Contact:

URL:
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Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2010-07-22 09:20 EDT by Rik van Riel
Modified:	2011-05-19 08:41 EDT (History)
CC List:	3 users (show)

See Also:
Fixed In Version:	kernel-2.6.32-112.el6
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2011-05-19 08:41:21 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2011:0542	normal	SHIPPED_LIVE	Important: Red Hat Enterprise Linux 6.1 kernel security, bug fix and enhancement update	2011-05-19 07:58:07 EDT

Groups: None (edit)

Description Rik van Riel 2010-07-22 09:20:06 EDT

Description of problem:

On swapin, pages are always assigned to the root anon_vma.  This can lead to pageout scalability issues when a large number of exclusively owned pages get swapped out and back in.

Need to backport my own 3 patches for this, as well as Kamezawa Hiroyuki's "Fix false positive BUG_ON in __page_set_anon_rmap" patch.

Comment 1 Andrea Arcangeli 2010-07-22 19:58:58 EDT

This is an optimization, I'm not sure how important this is.

This is my adapted patch that won't need the fix for bug-on.

http://git.kernel.org/?p=linux/kernel/git/andrea/aa.git;a=commitdiff;h=2fe4f42f0f17498984b3f86b2339d583004b45de;hp=ffd146080305632406d97c7f6f984a648854d755

Comment 4 RHEL Product and Program Management 2010-11-20 08:19:23 EST

This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has 
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed 
products. This request is not yet committed for inclusion in an Update release.

Comment 5 Aristeu Rozanski 2011-02-03 11:15:53 EST

Patch(es) available on kernel-2.6.32-112.el6

Comment 10 errata-xmlrpc 2011-05-19 08:41:21 EDT

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-2011-0542.html

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