Date: Wed, 26 Oct 2005 09:10:06 +0200 From: Bjoern Koenig <bkoenig@cs.tu-berlin.de> To: current@freebsd.org Subject: deadlocks with SMP and Pentium 3 Message-ID: <435F2BCE.1040704@cs.tu-berlin.de>
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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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