Date: Tue, 21 Mar 2006 18:11:59 -0400 From: Duane Whitty <duane@greenmeadow.ca> To: freebsd-questions@freebsd.org Subject: Dropping into ddb from kernel panic Message-ID: <44207A2F.1050501@greenmeadow.ca>
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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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