Date: Wed, 22 Sep 2010 10:43:45 +0300 From: Andriy Gapon <avg@freebsd.org> To: arch@freebsd.org Subject: Re: KDB, KDB_TRACE in GENERICs for stable/X Message-ID: <4C99B3B1.4070608@freebsd.org> In-Reply-To: <4C98CE89.7060908@freebsd.org> References: <4C98CE89.7060908@freebsd.org>
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on 21/09/2010 18:26 Andriy Gapon said the following: > > I would like to propose to add KDB and KDB_TRACE options to GENERIC kernel > configurations on stable branches. I've verified that without any other > KDB-related options and without any backend configured these options do not change > any aspect of system behavior. Any attempts to enter debugger are ignored; on > panic a panic message is printed and system reboots after that. > > With the proposed options and MFC of r212964 we should be able to get a backtrace > printed in addition to a standard panic message. This may help us in analyzing > problems during initial system installation and for systems that keep using > GENERIC after installation for various reasons. This is especially true for > panics that result from traps like page fault in which case we don't have much > information on cause of a trap. > > Presence of the proposed options in GENERIC should not affect those who include > GENERIC into their own configuration files for further extension and/or trimming. Patch that adds the options: http://people.freebsd.org/~avg/kdb-stable-generics.diff -- Andriy Gapon
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