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Bug 719357 - dlm: increase hash table maximum allocatable size
Summary: dlm: increase hash table maximum allocatable size
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel
Version: 6.2
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: rc
: ---
Assignee: Red Hat Kernel Manager
QA Contact: Cluster QE
URL:
Whiteboard:
Depends On: 678102
Blocks: 707974
TreeView+ depends on / blocked
 
Reported: 2011-07-06 15:16 UTC by David Teigland
Modified: 2011-12-06 13:49 UTC (History)
8 users (show)

Fixed In Version: kernel-2.6.32-175.el6
Doc Type: Bug Fix
Doc Text:
Clone Of: 678102
Environment:
Last Closed: 2011-12-06 13:49:12 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2011:1530 0 normal SHIPPED_LIVE Moderate: Red Hat Enterprise Linux 6 kernel security, bug fix and enhancement update 2011-12-06 01:45:35 UTC

Comment 1 David Teigland 2011-07-06 15:18:42 UTC 
This bz will be used to switch from kmalloc to vmalloc for the hash tables so that they can be larger.
Comment 2 David Teigland 2011-07-06 15:44:14 UTC 
posted to rhkernel:
http://post-office.corp.redhat.com/archives/rhkernel-list/2011-July/msg00241.html
Comment 3 David Teigland 2011-07-08 15:22:43 UTC 
reposted for 6.2
http://post-office.corp.redhat.com/archives/rhkernel-list/2011-July/msg00372.html
Comment 4 RHEL Program Management 2011-07-08 15:40:21 UTC 
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 Alan Brown 2011-07-16 14:04:49 UTC 
FYI, with the patch in, the maximum size which can be set on my systems (24 and 60Gb ram) is 16384.

I thought this might be of interest (60Gb systems)

 Active / Total Objects (% used)    : 137663214 / 142694757 (96.5%)
 Active / Total Slabs (% used)      : 12412037 / 12412080 (100.0%)
 Active / Total Caches (% used)     : 126 / 176 (71.6%)
 Active / Total Size (% used)       : 46148483.10K / 47191103.75K (97.8%)
 Minimum / Average / Maximum Object : 0.02K / 0.33K / 128.00K

  OBJS ACTIVE  USE OBJ SIZE  SLABS OBJ/SLAB CACHE SIZE NAME
41910825 40394358  96%    0.25K 2794055       15  11176220K size-256
23464431 23349154  99%    0.41K 2607159        9  10428636K gfs2_glock
23285820 23281096  99%    0.78K 4657164        5  18628656K gfs2_inode
19334949 17861706  92%    0.06K 327711       59   1310844K size-64
18148860 17039110  93%    0.22K 1067580       17   4270320K dlm_lkb
12967902 12741353  98%    0.21K 720439       18   2881756K dentry_cache
1266480 1113235  87%    0.09K  31662       40    126648K buffer_head
911840 907273  99%    0.09K  22796       40     91184K gfs2_bufdata
718361 326838  45%    0.52K 102623        7    410492K radix_tree_node
151808 151526  99%    0.92K  37952        4    151808K ext4_inode_cache
 84480  81702  96%    0.12K   2816       30     11264K size-128
 

gfs2_glock/inode/lkb levels on the 24Gb machines hover around the 7 million mark.
Comment 6 Kyle McMartin 2011-08-01 15:16:55 UTC 
Patch(es) available on kernel-2.6.32-175.el6
Comment 10 Nate Straz 2011-11-08 20:27:59 UTC 
VERIFIED that the patch is applied to kernel-2.6.32-193.el6
Comment 11 errata-xmlrpc 2011-12-06 13:49:12 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2011-1530.html
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