I'm getting the following panic during shutdown of a 6.1-PRERELEASE system
cvsupped yesterday. Strangely enabling DDB in the kernel "fixes" the
problem. The computer is an old P120 (which I should probably replace). It
occurs every time when DDB is disabled but when DDB is enabled, it does not
panic.
All buffers synced.
Uptime: 19m16s
(da0:ahc0:0:0:0): SYNCHRONIZE CACHE. CDB: 35 0 0 0 0 0 0 0 0 0
(da0:ahc0:0:0:0): Sense Error Code 0xe0 at block no. -1073741792 (decimal)
kernel trap 12 with interrupts disabled
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x1c
fault code = supervisor write, page not present
instruction pointer = 0x20:0xc0539553
stack pointer = 0x28:0xc6da2a68
frame pointer = 0x28:0xc6da2ab4
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = resume, IOPL = 0
current process = 1728 (reboot)
trap number = 12
panic: page fault
Uptime: 19m16s
I suspect that memory is mapped a tiny bit differently with DDB enabled and
thus we don't tickle a bug somewhere.
Thoughts?
--
Regards, Phone: (250)387-8437
Cy Schubert Fax: (250)387-5231
Team Leader, Solaris Team Email: Cy.Schubert@osg.gov.bc.ca
Open Systems Group, CITS
Ministry of Labour and Citizens' Services
Province of BC
FreeBSD UNIX: cy@FreeBSD.org
