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Date: Mon, 14 Apr 2003 07:36:39 -0700
From: "Martin J. Bligh" <mbligh@aracnet.com>
To: Bryan Shumsky <bzs@via.com>, linux-kernel@vger.kernel.org
Subject: Re: Memory mapped files question
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> Hi, everyone.  I'm running into a problem that I hope someone else has seen,
> and maybe can help solve.  We're using the mmap system function for memory
> mapped files, but our updates never get flushed until we munmap or msysnc.
> Are we missing something?  Is there a tunable parameter in the kernel or
> filing system that can be set to flag these updates as 'write required'?

This was discussed about a week ago on either linux-kernel or linux-mm.
The short answer is "yes, that's deliberate", but an archive search would 
probably be fruitful.

M.