Date: Wed, 26 Oct 2005 03:39:15 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Bjoern Koenig <bkoenig@cs.tu-berlin.de> Cc: current@freebsd.org Subject: Re: deadlocks with SMP and Pentium 3 Message-ID: <20051026073915.GA77249@xor.obsecurity.org> In-Reply-To: <435F2BCE.1040704@cs.tu-berlin.de> References: <435F2BCE.1040704@cs.tu-berlin.de>
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[-- Attachment #1 --] On Wed, Oct 26, 2005 at 09:10:06AM +0200, Bjoern Koenig wrote: > 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? You need to break to DDB, trace processes and examine lock state with commands like 'show alllocks' and 'show lockedvnods' to see what is going on. Kris [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDXzKiWry0BWjoQKURAh6kAJ9HWnZITlADvngcA8kgkTncF6ZBQgCglY6T lANyLRO8Ez9SDkglm2Yp0No= =CUyq -----END PGP SIGNATURE-----
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