Bug 465307 – System hang on boot

Bug 465307 - System hang on boot

Summary:	System hang on boot

Status:	CLOSED WONTFIX

Aliases:	None

Product:	Red Hat Enterprise MRG
Classification:	Red Hat
Component:	realtime-kernel (Show other bugs)
Sub Component:
Version:	1.0
Hardware:	i686 Linux

Priority	high Severity urgent
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Assigned To:	Peter Zijlstra
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Reported:	2008-10-02 13:36 EDT by Clark Williams
Modified:	2014-08-11 01:40 EDT (History)
CC List:	7 users (show)

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Doc Type:	Bug Fix
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Last Closed:	2011-02-10 15:53:27 EST
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Description Clark Williams 2008-10-02 13:36:25 EDT

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 10:34:04 EDT

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 15:53:27 EST

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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