Bug 599737 – vm.drop_caches corrupts hugepages and causes Oracle Database ORA-600 crashes [rhel-5.5.z]

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Bug 599737 - vm.drop_caches corrupts hugepages and causes Oracle Database ORA-600 crashes [rhel-5.5.z]

Summary:	vm.drop_caches corrupts hugepages and causes Oracle Database ORA-600 crashes ...

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 5
Classification:	Red Hat
Component:	kernel (Show other bugs)
Sub Component:
Version:	5.4
Hardware:	All Linux

Priority	high Severity high
Target Milestone:	rc
Target Release:	---
Assigned To:	Jiri Pirko
QA Contact:	Red Hat Kernel QE team
Docs Contact:

URL:
Whiteboard:
Keywords:	ZStream

Depends On:	579469
Blocks:
	Show dependency tree / graph

Reported:	2010-06-03 15:58 EDT by RHEL Product and Program Management
Modified:	2015-05-04 21:20 EDT (History)
CC List:	11 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:	Issuing the "sysctl -w vm.drop_caches=1" command on a system running a database backed by HugePages caused memory corruption errors. This update fixes this issue by ensuring that the HugePages "dirty bit" is properly set, with the result that corruption no longer occurs when dropping the virtual memory caches.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2010-07-01 14:29:47 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2010:0504	normal	SHIPPED_LIVE	Important: kernel security and bug fix update	2010-07-01 14:26:58 EDT

Groups: None (edit)

Description RHEL Product and Program Management 2010-06-03 15:58:04 EDT

This bug has been copied from bug #579469 and has been proposed
to be backported to 5.5 z-stream (EUS).

Comment 3 Jiri Pirko 2010-06-07 09:31:51 EDT

in 2.6.18-194.6.1.el5

Comment 7 Douglas Silas 2010-06-28 16:46:34 EDT

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:
Issuing the "sysctl -w vm.drop_caches=1" command on a system running a database backed by HugePages caused memory corruption errors. This update fixes this issue by ensuring that the HugePages "dirty bit" is properly set, with the result that corruption no longer occurs when dropping the virtual memory caches.

Comment 9 errata-xmlrpc 2010-07-01 14:29:47 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-2010-0504.html

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