Date: Fri, 30 Apr 2004 15:03:59 -0400 (EDT)
From: Rik van Riel <riel@redhat.com>
To: Christoph Hellwig <hch@infradead.org>
cc: Shailabh Nagar <nagar@watson.ibm.com>,
       linux-kernel <linux-kernel@vger.kernel.org>,
       ckrm-tech <ckrm-tech@lists.sourceforge.net>
Subject: Re: [ckrm-tech] Re: [RFC] Revised CKRM release
In-Reply-To: <20040430174117.A13372@infradead.org>
Message-ID: <Pine.LNX.4.44.0404301502550.6976-100000@chimarrao.boston.redhat.com>
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On Fri, 30 Apr 2004, Christoph Hellwig wrote:

> I'd hate to see this in the kernel unless there's a very strong need
> for it and no way to solve it at a nicer layer of abstraction, e.g.
> userland virtual machines ala uml/umlinux.

User Mode Linux could definitely be an option for implementing
resource management, provided that the overhead can be kept
low enough.

For these purposes, "low enough" could be as much as 30%
overhead, since that would still allow people to grow the
utilisation of their server from a typical 10-20% to as
much as 40-50%.

-- 
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it." - Brian W. Kernighan

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