Bug 725105 - kdump fails on 6.1 x86 with high lun count
Summary: kdump fails on 6.1 x86 with high lun count
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel
Version: 6.1
Hardware: i686
OS: Linux
unspecified
medium
Target Milestone: rc
: ---
Assignee: Red Hat Kernel Manager
QA Contact: Red Hat Kernel QE team
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-07-22 20:25 UTC by apfeiffe
Modified: 2015-09-16 23:46 UTC (History)
12 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-09-28 02:37:22 UTC
Target Upstream Version:

Attachments (Terms of Use)
Serial conole log from failed kdump (36.16 KB, application/octet-stream)
2011-07-22 20:25 UTC, apfeiffe 		no flags Details
sosreport from failing system (2.12 MB, application/octet-stream)
2011-07-22 20:29 UTC, apfeiffe 		no flags Details
View All Add an attachment (proposed patch, testcase, etc.)

Description apfeiffe 2011-07-22 20:25:02 UTC 
Created attachment 514790 [details]
Serial conole log from failed kdump

Description of problem:
Configuration:
- BL460c G6
- Red Hat 6.1 x86
- Kernel version
- 84 luns and 564 paths

Version-Release number of selected component (if applicable):
kernel-2.6.32-131.0.15.el6.i686
system-config-kdump-2.0.2.2-2.el6.noarch


How reproducible:
About 1 in 3 times it fails to kdump properly.

Steps to Reproduce:
1. Assign a high lun/path count to the system
2. trigger a kdump by running: echo "c" > /pro/sysrq-trigger

  
Actual results:
kdump kernel throws memory errors and then panics

Expected results:
kdump should dump a core file and reboot the system

Additional info:
Comment 1 apfeiffe 2011-07-22 20:29:42 UTC 
Created attachment 514791 [details]
sosreport from failing system
Comment 3 Qian Cai 2011-07-25 01:55:56 UTC 
Looks like this system is setup with multi-path which currently kdump did not support it at the moment.
Comment 4 apfeiffe 2011-08-01 22:57:14 UTC 
kdump is configured for multi-path.  If I remove the extra paths it does create a dump file on the multipath device.  At this point, I have found out the customer I am performing this test for isn't going to support Red Hat 6.1 x86 so I will drop testing kdump on this OS.
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