Bug 690239 - gfs2: creating large files suddenly slow to a crawl [rhel-5.6.z]
Summary: gfs2: creating large files suddenly slow to a crawl [rhel-5.6.z]
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel
Version: 5.7
Hardware: Unspecified
OS: Unspecified
urgent
high
Target Milestone: rc
: ---
Assignee: Robert Peterson
QA Contact: Red Hat Kernel QE team
URL:
Whiteboard:
Depends On: 683155
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-03-23 16:53 UTC by RHEL Program Management
Modified: 2018-11-14 13:25 UTC (History)
13 users (show)

Fixed In Version: kernel-2.6.18-238.10.1.el5
Doc Type: Bug Fix
Doc Text:
GFS2 (Global File System 2) keeps track of the list of resource groups to allow better performance when allocating blocks. Previously, when the user created a large file in GFS2, GFS2 could have run out of allocation space because it was confined to the recently-used resource groups. With this update, GFS2 uses the MRU (Most Recently Used) list instead of the list of the recently-used resource groups. The MRU list allows GFS2 to use all available resource groups and if a large span of blocks is in use, GFS2 uses allocation blocks of another resource group.
Clone Of:
Environment:
Last Closed: 2011-05-31 14:08:35 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
The 5.6.z crosswrite patch (5.82 KB, patch)
2011-03-23 18:26 UTC, Robert Peterson 		no flags Details | Diff
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2011:0833 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2011-05-31 14:05:42 UTC

Description RHEL Program Management 2011-03-23 16:53:53 UTC 
This bug has been copied from bug #683155 and has been proposed
to be backported to 5.6 z-stream (EUS).
Comment 3 Robert Peterson 2011-03-23 18:26:47 UTC 
Created attachment 487110 [details]
The 5.6.z crosswrite patch

The 5.7 patch does not apply directly to the 5.6.z kernel.
This one is the proper patch for 5.6.z.  I verified its
contents using kompare against the 5.7 patch.
Comment 4 Robert Peterson 2011-03-23 18:27:11 UTC 
Patch provided; setting devel_ack.
Comment 6 Phillip Lougher 2011-04-15 15:07:18 UTC 
in kernel-2.6.18-238.10.1.el5

linux-2.6-fs-gfs2-creating-large-files-suddenly-slow-to-a-crawl.patch
Comment 9 errata-xmlrpc 2011-05-31 14:08:35 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-2011-0833.html
Comment 10 Martin Prpič 2011-06-02 13:32:21 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:
GFS2 (Global File System 2) keeps track of the list of resource groups to allow better performance when allocating blocks. Previously, when the user created a large file in GFS2, GFS2 could have run out of allocation space because it was confined to the recently-used resource groups. With this update, GFS2 uses the MRU (Most Recently Used) list instead of the list of the recently-used resource groups. The MRU list allows GFS2 to use all available resource groups and if a large span of blocks is in use, GFS2 uses allocation blocks of another resource group.
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