From owner-cvs-all  Mon Apr  1  6: 1:18 2002
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To: Dag-Erling Smorgrav <des@ofug.org>
Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/sys kerneldump.h 
In-Reply-To: Your message of "01 Apr 2002 15:57:21 +0200."
             <xzpy9g7bjy6.fsf@flood.ping.uio.no> 
Date: Mon, 01 Apr 2002 16:00:42 +0200
Message-ID: <6019.1017669642@critter.freebsd.dk>
From: Poul-Henning Kamp <phk@critter.freebsd.dk>
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In message <xzpy9g7bjy6.fsf@flood.ping.uio.no>, Dag-Erling Smorgrav writes:

>A binary format makes future extensions more difficult.  As it is,
>your dump header already needs modification (or extension) to cope
>with the sparc64 platform which has discontiguous physical memory,
>while my proposed text format already handled that case.

My format consists of one platform neutral header of 512 bytes,
which among other things tell you what the platform is.

It places no restrictions on what the actual dump contains, and
consequently if a particular platform needs metadata, it is perfectly
possible to add platform specific headers for that purpose.

But as I already said in the commit message:  I disclaim all maintainer
ship in this area, I just passed by because the devicedriver interface
needed to be cleaned up.

If you have a better idea for an on-disk format: Go for it.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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