PLEASE TEST: IPI deadlock avoidance patch

[Garance A Drosihn]

At 8:51 PM -0400 8/23/04, Brian Fundakowski Feldman wrote:
>On Mon, Aug 23, 2004, Garance A Drosihn wrote:
>  > [...]    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.
>
>Are you watching system temperatures?

I doubt that's a problem right now.  Right now my office is pretty
chilly, and it was even cooler last night while these were running.
This is the first time I've seen these "*** Signal 6"s, and this
is also the first time I've tried a USE_KQUEUE verison of `make'.
And while the make-related processes died with the signal's, none
of the other processes on the system had any problems.  (including
the folding-at-home client which is still running on the machine).

Also, this machine is usually running two copies of the "folding at
home" client, so it is *usually* running flat-out, 24 hours a day.

There are other days when the air-conditioning in the computer
center is a bit flaky, and my office gets up to 90F.  This machine
hasn't had any problems at those temperatures (although I sometimes
do!).

-- 
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