Please help me diagnose this crazy VMWare/FreeBSD 8.x crash

Mark Felder feld at
Thu May 24 13:47:58 UTC 2012

On Wed, 23 May 2012 17:30:40 -0500, Adrian Chadd <adrian at>  

> Hi,
> can you please, -please- file a PR? And place all of the above
> information in it so we don't lose it?

I'd be glad to post a PR and assist in helping to get it permanently  
fixed. I certainly don't want this data to get lost and honestly our  
business uses FreeBSD on VMWare so much that we really need a permanent  
fix as much as anyone else :-)

The reason I've hesitated to post a PR so far is that I didn't have any  
truly useful or concrete evidence of where the problem lies. After Dane  
Foster contacted me and told me he could recreate the crash on demand with  
his workload it was easier to narrow things down. The suggestion that it  
was an interrupts issue (by possibly Bjoern Zeeb?) and Dane's discovery  
that his crashes ceased when em0 and mpt0 share an IRQ, but em0 is  
completely unused was starting to prove there is some strong evidence here  
in favor of the interrupts issue.

Dane, what's the status on your end? Has your fix still been successful?  
Is it also stable if you simply set hint.mpt.0.msi_enable="1" ?


More information about the freebsd-questions mailing list