Red Hat Bugzilla – Bug 197113
hangs w/ diskio and quota updates
Last modified: 2007-11-30 17:07:10 EST
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
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
The system hangs, i.e. accepts no console input other than SysRq.
The system would continue to run.
We have tried the patch mentioned in bug # 122252 but still hang.
We can provide account on test box if needed.
Created attachment 131683 [details]
qtwiddle2_jnl.c, stress_jnl.py, stresstst_jnl.c
RHEL3 is now closed.
Closing re: Comment #2.