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Date: Wed, 15 Dec 2004 22:58:12 +0100
From: Pawel Jakub Dawidek <pjd@FreeBSD.org>
To: Jun Su <csujun@gmail.com>
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Subject: Re: Propose for Several Dump types
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On Tue, Dec 14, 2004 at 03:43:37PM +0800, Jun Su wrote:
+> Kernel-Only Dump
+> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
+> We now can use /dev/kmem as the core file. If we can generate a dump fil=
e with
+> the same information with it, then we can enable kernel-only dump with
+> very limit code changes.
+>=20
+> 1. Change KVM library to support a new type of file that only contains
+> kernel memory.
+> 2. Change kernel side to write only kernel memory when dumping.
+> 3. Change dumpon utility to do the right checking on the partiction size.

I like the idea of Kernel-Only dump also because of security reasons -
user may not want to send whole dump full of passwords, etc.

It will be also cool if we can introduce malloc(9) flag (M_NODUMP), so we
can safely allocate things like gbde keys, etc. and be sure it will not
be part of a dump.

--=20
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd@FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!

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