Bug 197113

Summary: hangs w/ diskio and quota updates
Product: Red Hat Enterprise Linux 3 Reporter: Ken Marquess <kenm>
Component: kernelAssignee: Red Hat Kernel Manager <kernel-mgr>
Status: CLOSED CANTFIX QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 3.0CC: dbluft, ktower, petrides
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2007-09-13 12:53:50 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:
Attachments:
Description Flags
qtwiddle2_jnl.c, stress_jnl.py, stresstst_jnl.c none

Description Ken Marquess 2006-06-28 16:58:39 UTC 
Description of problem: We have 19 IMAP servers supporting 86000 faculty and
staff. We are getting intermitteng hangs that require a reboot.


Version-Release number of selected component (if applicable):
 Red Hat Enterprise Linux AS release 3 (Taroon Update 7)

How reproducible: We have a test system where we induce disk io load and
quota updates, which has an MTBF under 20 minutes; under 10 minutes is
common.


Steps to Reproduce:
1.Run program simulating high multiprocess disk load: 'stress_jnl.py'
2.Run program updating quotas: 'qtwiddle2_jnl -n 20000 -s 1'
3.Wait for hang
  
Actual results:
The system hangs, i.e. accepts no console input other than SysRq.


Expected results:
The system would continue to run.


Additional info:
We have tried the patch mentioned in bug # 122252 but still hang.
We can provide account on test box if needed.
Comment 1 Ken Marquess 2006-06-28 16:58:39 UTC 
Created attachment 131683 [details]
qtwiddle2_jnl.c, stress_jnl.py, stresstst_jnl.c
Comment 2 Ernie Petrides 2006-06-28 22:46:36 UTC 
RHEL3 is now closed.
Comment 3 Prarit Bhargava 2007-09-13 12:53:50 UTC 
Closing re: Comment #2.

P.