From owner-freebsd-arch@FreeBSD.ORG  Wed Aug 25 16:01:16 2010
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To: Marcel Moolenaar <xcllnt@mac.com>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Wed, 25 Aug 2010 08:58:16 MST."
	<34EF2360-1B68-4E0C-8CCE-409CE141D0B8@mac.com> 
Date: Wed, 25 Aug 2010 16:01:13 +0000
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Cc: "freebsd-arch@FreeBSD.org Arch" <freebsd-arch@freebsd.org>
Subject: Re: RFC: root mount enhancement (round 2) 
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In message <34EF2360-1B68-4E0C-8CCE-409CE141D0B8@mac.com>, Marcel Moolenaar wri
tes:

>don't want to enhance: A USB disk cannot always be used as a root
>file system by virtue of the USB stack releasing the root mount
>lock after creating the umass device, but before CAM has created
>the corresponding da device. 

This is a bug which is entirely unrelated to how we find the
root filesystem:  It should simply be fixed by CAM grabing a
root mount lock when activated from USB and releasing it
only when all it's stuff is done.

-- 
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.