PLEASE TEST: IPI deadlock avoidance patch

[Brian Fundakowski Feldman]

On Mon, Aug 23, 2004 at 02:17:30PM -0400, Garance A Drosihn wrote:
> At 12:05 PM -0700 8/22/04, Doug White wrote:
> >Hey folks,  [...]   please try this patch:
> >
> >http://people.freebsd.org/~dwhite/smp_rv_mtx.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.

Are you watching system temperatures?

-- 
Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green at FreeBSD.org                               \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\