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 ...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel
Version: 5.4
Hardware: All
OS: Linux
high
high
Target Milestone: rc
: ---
Assignee: Jiri Pirko
QA Contact: Red Hat Kernel QE team
URL:
Whiteboard:
Depends On: 579469
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-06-03 19:58 UTC by RHEL Program Management
Modified: 2015-05-05 01:20 UTC (History)
11 users (show)

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.
Clone Of:
Environment:
Last Closed: 2010-07-01 18:29:47 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2010:0504 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2010-07-01 18:26:58 UTC

Description RHEL Program Management 2010-06-03 19:58:04 UTC 
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 13:31:51 UTC 
in 2.6.18-194.6.1.el5
Comment 7 Douglas Silas 2010-06-28 20:46:34 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:
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 18:29:47 UTC 
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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