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From: Don Lewis <truckman@FreeBSD.org>
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Cc: ae@FreeBSD.org, arch@FreeBSD.org
Subject: Re: [patch] allow crash dumps to Linux swap partitions
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On 18 Feb, Doug Barton wrote:
> On 02/18/2012 09:50, Andrey V. Elsukov wrote:
>> I think we can check bp->bio_from field, something like that (not tested):
> 
> That made dumpon happy anyway, thanks!  I'm a bit rusty on "how to cause
> a dump on purpose" nowadays .... I'm running 8-stable right now, if
> someone wants to give me a hint I'll test this.

Break into DDB and type "call doadump".