Date: Wed, 25 Aug 2010 14:44:47 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: phk@phk.freebsd.dk Cc: xcllnt@mac.com, freebsd-arch@FreeBSD.org Subject: Re: RFC: root mount enhancement (round 2) Message-ID: <20100825.144447.195066307629816163.imp@bsdimp.com> In-Reply-To: <54210.1282752073@critter.freebsd.dk> References: <34EF2360-1B68-4E0C-8CCE-409CE141D0B8@mac.com> <54210.1282752073@critter.freebsd.dk>
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In message: <54210.1282752073@critter.freebsd.dk>
"Poul-Henning Kamp" <phk@phk.freebsd.dk> writes:
: 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.
We already do this... But it is insufficient since usb discovery is
done asynchronously...
Scott has a similar fix in the pipeline, but I don't know the state of
it.
Warner
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