deadlocks with SMP and Pentium 3
Bjoern Koenig
bkoenig at cs.tu-berlin.de
Wed Oct 26 00:11:18 PDT 2005
Hello,
I have an Asus CUVX4-D mainboard with an VIA Apollo Pro 133A chipset and
two Intel Pentium III 733 MHz processors. It runs fine with FreeBSD 4.11
and SMP enabled, but something happened before 5.0-RELEASE that it don't
work anymore now; neither with 5.4-RELEASE, 6.0-RC1 nor 7-CURRENT. In
case I have many concurrent processes the system just locks up after a
few minutes.
I disabled ACPI, compiled a kernel with WITNESS, set all debug mpsafe
tunables to zero and many other things, but nothing helped to find a
reason for this behaviour. Right now I noticed that top(1) shows a huge
bunch of processes with the state *Giant shortly before the machine
freezed. Therefore I think it's related to the giant lock. ;-)
Currently I prepare to do a binary search in HEAD between march 2000 and
januar 2003, but I would be glad if somebody still has a hint for me to
prevent me from doing this. Is there still a way to gather debug
information?
Regards
Björn
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