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Date: Thu, 7 Jun 2012 16:44:40 -0400
Message-ID: <CAFMmRNxUoXixSwewEQTrzP7k2oMDsxu8MtskTBDbhvj_ot46rQ@mail.gmail.com>
From: Ryan Stone <rysto32@gmail.com>
To: Alexander Leidinger <Alexander@leidinger.net>
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Cc: Attilio Rao <attilio@freebsd.org>, grav <des@des.no>,
	Adrian Chadd <adrian@freebsd.org>, arch@freebsd.org, Dag-Erling@freebsd.org
Subject: Re: KTR_SPAREx
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On Thu, Jun 7, 2012 at 4:09 PM, Alexander Leidinger
<Alexander@leidinger.net> wrote:
> How many of them need to run very early so that not enough
> kernel infrastructure is available to run dtrace (can we run dtrace
> scripts very early during boot (when enough kernel infrastructure is
> available, before anything in userland starts) like in Solaris)?

We don't currently have boot-time DTrace in FreeBSD.  We also don't
have post mortem DTrace (ie the equivalent of ktrdump -m).

However, I would suspect that most of the cases in the tree where
drivers have been checked in using KTR_SPARE could be replaced by
DTrace.