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From: John Baldwin <jhb@freebsd.org>
To: freebsd-current@freebsd.org
Subject: Re: 10.0-RELEASE BTX halted on DELL R900
Date: Fri, 11 Jul 2014 14:21:39 -0400
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Cc: stable@freebsd.org, current@freebsd.org, wsk <wsk@gddsn.org.cn>,
 questions@freebsd.org, Dimitry Andric <dim@freebsd.org>,
 Arrigo Marchiori <ardovm@yahoo.it>
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On Saturday, July 05, 2014 8:57:45 am Dimitry Andric wrote:
> > Just in case, you could try the patch attached to this bug:
> > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=176748
> > 
> > The patch was compiled for 9-STABLE; if it does not apply to the 10.0
> > sources, then drop me a line so I can adapt it.
> 
> I tried this patch on a few FreeBSD VMs, and each of them stopped being
> able to mount the root filesystem because of it.  I don't really know
> what the explanation is...

That patch is just wrong.  I've updated the PR with something that is probably
similar to your patch (explicitly ignore a size of zero back from EDD).

-- 
John Baldwin