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To: Andrea Arcangeli <andrea@suse.de>
Cc: Ryan Cumming <bodnar42@phalynx.dhs.org>, linux-kernel@vger.kernel.org
Subject: Re: Special Kernel Modification 
In-Reply-To: Your message of "Mon, 05 Nov 2001 17:53:37 +0100."
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Date: Mon, 05 Nov 2001 15:18:42 -0500
From: Jeff Dike <jdike@karaya.com>
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andrea@suse.de said:
> O_DIRECT is synchronous but only in terms of data, if you want the
> metadata to be synchronous as well you need to open with
> O_SYNC|O_DIRECT, and even in such case all the metadata reads will
> came from cache. 

That's OK.  The goal is to cram as many UMLs onto a host as possible by
eliminating caching as much as possible.  If the metadata/data ratio is
small, then the metadata caching probably won't be noticable.

				Jeff