| Austin Murphy on 29 Feb 2012 07:32:25 -0800 |
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| Re: [PLUG] uptime bug in linux kernels |
On Tue, Feb 28, 2012 at 10:31 PM, Amul Shah <amul@amulz.com> wrote: > This came up at work yesterday. A customer was notified by Novell that SLES 11 could hang or crash after the uptime exceeded 200 days. We've asked the customer to find out more details. Has anyone heard of this before? I've seen a problem with Oracle 10 on linux and uptimes over 199 days. The problem was a linux cpu tick counter that wrapped. times() returns the # of ticks since boot and apparently my server ticked at about 125 ticks/second. It wrapped at 2^31 and started counting down, I assume it was interpreted as signed, when it should have been unsigned. 2^31/(125*24*60*60) =~ 198.8 days to wrap. Austin ___________________________________________________________________________ Philadelphia Linux Users Group -- http://www.phillylinux.org Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug