Date: Sat, 30 Aug 2003 09:22:10 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: "Kenneth D. Merry" <ken@kdm.org> Cc: current@FreeBSD.org Subject: Re: need some debugging help Message-ID: <3821.1062228130@critter.freebsd.dk> In-Reply-To: Your message of "Fri, 29 Aug 2003 22:03:57 MDT." <20030830040357.GA42770@panzer.kdm.org>
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In message <20030830040357.GA42770@panzer.kdm.org>, "Kenneth D. Merry" writes: >I think I have everything setup correctly, but I keep getting panics inside >the GEOM code with these patches. (Memory modified after free.) I don't >know whether I've just exposed some race condition, or whether I've done >something wrong. Do you have any idea what goes on at/right before the panic ? Ie: has drives been created [disk_create()] or removed [disk_destroy()] right before ? My best shot, would be that disk_destroy() was called and something somehow fiddled the related structures subsequently. You may want to set kern.geom.debugflags=N and see if that offers any clues. N |= 1 topology events N |= 2 bio processing (ie: many lines for each I/O) N |= 4 access processing (open/close) -- 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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