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Automatic dump possiblity detection [was: panic: softint screwup]

On Tue, Feb 04, 2020 at 07:03:28AM -0400, Jared McNeill wrote:
> [...] Unfortunately the default ddb.onpanic=0
> strikes again and I can't get any more information than this:
> [ 364.3342263] dump to dev 92,33 not possible
> [ 364.3342263] rebooting...

I wonder if we should try to find out if a dump would be possible and if
not override the the default for ddb.onpanic.

I'm not sure how to do that in an rc.d script with no further kernel help
right now though. Any good ideas? Maybe swapctl could gain some new
op to query this?


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