Bug 465307

Summary:	System hang on boot
Product:	Red Hat Enterprise MRG	Reporter:	Clark Williams <williams>
Component:	realtime-kernel	Assignee:	Peter Zijlstra <pzijlstr>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	urgent	Docs Contact:
Priority:	high
Version:	1.0	CC:	bhu, lgoncalv, lwang, pzijlstr, srostedt, tglx, williams
Target Milestone:	---
Target Release:	---
Hardware:	i686
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-02-10 20:53:27 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

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.