gmirrored boot drives locks up during buildworld

[Pawel Jakub Dawidek]

On Mon, Mar 14, 2005 at 01:46:15PM -0500, Michael Boers wrote:
+> I recently installed FreeBSD 5.3 on a machine to be my primary mysql  
+> server.  The machine failed after about 3 weeks of heavy use.  The  
+> machine did not panic, it just froze and some random characters  
+> appeared on the console.  A reboot restored the system for another few  
+> weeks.  On the third failure I took it out of production.
+> 
+> The machine consists of a Intel Pentium 4 EE HT with a pair of 80  
+> gigabyte IDE gmirrored boot drives and a pair of 250 gigabyte IDE  
+> gmirror data drives.
+> 
+> With the machine out of production, I used
+> 
+> while (true) do make clean; make buildworld; done
+> 
+> to exercise the machine until it failed.  Usually within three days.  I  
+> swapped video cards, memory, hard drives, and played with bios settings  
+> to no avail.  Finally I determined that when I ran without using  
+> gmirror, the machine would build indefinitely.
+> 
+> Finally, I tried the buildworld test on a completely different (amd vs  
+> intel, scsi vs ide disks) machine and it failed in less than 3 hours.
+> 
+> Because the system freezes rather than panics, I have no diagnostic  
+> information to provide.
+> 
+> If this is a possible gmirror bug, please let me know if there is any  
+> other information I can provide.  I am very interested in using gmirror  
+> but I want to make sure it is safe.  Please feel free to call me at the  
+> below number if necessary.

Could increase kern.geom.mirror.debug to 1?
Could you turn on HTT and compile your kernel with MP_WATCHDOG (you should
also set debug.watchdog to 1)?

-- 
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd at FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!
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