PLEASE TEST: IPI deadlock avoidance patch
Garance A Drosihn
drosih at rpi.edu
Mon Aug 23 11:17:37 PDT 2004
At 12:05 PM -0700 8/22/04, Doug White wrote:
>Hey folks, [...] please try this patch:
>This patch avoids a deadlock between the smp_rendezvous()
>mechanism and TLB shootdowns via pmap by forcing them to
>share a mutex.
I have completed a series of buildworlds with -j3 to -j10 with
no problem. I then started up a "folding at home" client, and
repeated the buildworlds. No panics, but in the second set I
did have one buildworld (-j9) which failed with four processes
apparently getting a "*** Signal 6". I am not sure what that
was about. Note that all these builds were done with a `make'
that was compiled to USE_KQUEUE , so maybe that's where the
Signal's came from. In any case, the machine is still running
fine, even after that heavy pounding.
Garance Alistair Drosehn = gad at gilead.netel.rpi.edu
Senior Systems Programmer or gad at freebsd.org
Rensselaer Polytechnic Institute or drosih at rpi.edu
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