unable to make a crashdump
gallatin at cs.duke.edu
Thu Jun 24 04:58:50 PDT 2004
Claus Guttesen writes:
> I'm trying to get a crashdump from my kernel when it
> panics. I have the following in my kernel:
> makeoptions DEBUG=-g
> options DDB, DDB_UNATTENDED
You may also want to add DDB_TRACE. This gets a stack
trace on console regardless of a crashdump's success.
You may have to jot it down by hand, but in many cases its enough
to characterize the panic enough for a meaningful problem report.
> syncing bugger 3795
> And then it hangs. Swap is 2 GB, RAM is 1 GB.
Sync'ing on panic nearly always locks my machines up too.
When I turn this off (sysctl kern.sync_on_panic=0), then
I reliably get dumps.
Is anybody able to reliably get dumps with kern.sync_on_panic enabled?
Maybe it works on SCSI boxes (all of my crashboxes are IDE)...
More information about the freebsd-current