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Date:      Wed, 01 May 2002 13:25:41 -0700
From:      Michael Sierchio <kudzu@tenebras.com>
To:        Ian Dowse <iedowse@maths.tcd.ie>
Cc:        utsl@quic.net, "Andrew P. Lentvorski" <bsder@allcaps.org>, freebsd-fs@freebsd.org
Subject:   Re: Non-standard root filesystems
Message-ID:  <3CD04F45.1040704@tenebras.com>
References:  <200205012115.aa68752@salmon.maths.tcd.ie>

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Ian Dowse wrote:

> I never said anything about using union filesystems; you can just
> mount another filesystem directly over /, and it hides the underlying
> root filesystem.

Covering mounts are also broken, IIRC, with the same cache coherency
problem.  I may be mistaken, but the problem is with NULLFS, which
is required for covering mounts.


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