PLEASE TEST: IPI deadlock avoidance patch
dwhite at gumbysoft.com
Thu Aug 26 10:37:59 PDT 2004
On Mon, 23 Aug 2004, Garance A Drosihn wrote:
> 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.
Signal 6 is SIGABRT, which is usually intentional. You'd have to check the
output for a specific process that abended. I'd also have to scan the
make code for any abort() calls.
Doug White | FreeBSD: The Power to Serve
dwhite at gumbysoft.com | www.FreeBSD.org
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