Bug 465307 - System hang on boot
Summary: System hang on boot
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise MRG
Classification: Red Hat
Component: realtime-kernel
Version: 1.0
Hardware: i686
OS: Linux
high
urgent
Target Milestone: ---
: ---
Assignee: Peter Zijlstra
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2008-10-02 17:36 UTC by Clark Williams
Modified: 2014-08-11 05:40 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-02-10 20:53:27 UTC
Target Upstream Version:
Embargoed:


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Description Clark Williams 2008-10-02 17:36:25 UTC
Description of problem:

the system (a Sun x4150 with 16GB RAM) locks during boot, when the rtctl service runs to set kernel thread priorities.

Version-Release number of selected component (if applicable):
2.6.24.7-74.el5rt

How reproducible:
Always

Steps to Reproduce:
1. Load MRG RT 32-bit kernel
2. Boot system
3. system hangs when rtctl service runs

Additional info:

Customer noted that when /etc/rtgroups line for softirq was changed to priority 65 (as opposed to the 70 value that's delivered) the system boots.

Comment 1 Clark Williams 2008-10-09 14:34:04 UTC
It's been noted that this Sun system isn't the only one that has failed to boot the -rt kernel due to large amounts of ram.  Specifically, an HP DL585g5 with 32GB of RAM failed to boot in the perf-lab. 

I'm inclined to elevate the severity of this one.

Comment 2 Clark Williams 2011-02-10 20:53:27 UTC
No one has reported this on our 2.6.33-based kernel, so I'm closing. If we hit it again, we can reopen or open a new bug.


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