Dropping into ddb from kernel panic
Duane Whitty
duane at greenmeadow.ca
Tue Mar 21 22:13:09 UTC 2006
Hi,
I am trying to learn how to trace kernel issues
or determine if a problem even is a kernel issue.
Here are the debugging options I have set in my kernel config.
makeoptions DEBUG=-g
options KDB
options KDB_TRACE
options DDB
options KTRACE
options AHC_REG_PRETTY_PRINT
options AHD_REG_PRETTY_PRINT
#sysctl -a
debug.debugger_on_panic: 1
I am trying to track down two system crash problems.
One is a kmem_map issue.
Are my kernel debug options correct or am I missing
anything (memguard perhaps)?
Would being in an X session interfere with dropping
into the debugger?
Are there any specific options I should set in the make.conf
for the buildworld/buildkernel process?
Thanks in advance for any pointers
--Duane
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