Hi all, I did some more investigating and found what was causing the nvidia driver to occasionally panic on my machine. It calls cv_wait(9) using a spin mutex, which according to the man page is a no-no. I simply changed the os_*_sema interfaces to use a standard mutex instead. Tried running a bunch of glxgears and xscreensaver GL demos in parallel and haven't been able to reproduce a panic since. As a bonus, the 5 second pause I would sometimes get when a GL-based xscreensaver process terminates seems to be gone as well. There doesn't appear to be any documentation that I could find as to what contexts those functions may be called from. I'm not a locking guru, so I can't say for certain why a spin mutex was being used. Wild guess: an artifact from the 4.x or 5.x code that may be obsoleted by adaptive mutexes. Patch is attached; cc danfe_at_ in case others report this problem to him. CraigReceived on Tue Oct 02 2007 - 18:48:59 UTC
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