Red Hat Bugzilla – Bug 128855
su to root maxxes out CPU for 60-90 seconds
Last modified: 2007-11-30 17:10:46 EST
From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.5) Gecko/20031007 Description of problem: The first time I su to root on a given day, /bin/su will consume 100% of the CPU for 60 to 90 seconds, during which time the system is almost completely unresponsive. xload shows the cpu load spiking to 7 or 8 from near-zero load before and after. Subsequent invocations of su that day will perform normally, but the problem always returns the next day. Given the recurrent daily nature of this I suspected that it might be related to a bad cron job leaving some garbage behind, but so far I've been unable to duplicate the problem by running cron jobs during the day and checking the system immediately after they run. Version-Release number of selected component (if applicable): coreutils-5.0-34.1 How reproducible: Sometimes Steps to Reproduce: 1. su to root Actual Results: CPU utilization spikes to 100% for 60-90 seconds on first invocation per day. Expected Results: CPU utilization should be negligable; command should return immediately Additional info:
Please log in as root and run: strace /bin/su 2>log Then attach the resulting 'log' file.
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