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Date: Wed, 23 Jan 2002 10:38:33 -0800 (PST)
Message-Id: <20020123.103833.35505971.davem@redhat.com>
To: acahalan@cs.uml.edu
Cc: wli@holomorphy.com, vda@port.imtp.ilyichevsk.odessa.ua,
        linux-kernel@vger.kernel.org, andrea@suse.de, alan@redhat.com,
        akpm@zip.com.au, vherva@niksula.hut.fi
Subject: Re: Athlon/AGP issue update
From: "David S. Miller" <davem@redhat.com>
In-Reply-To: <200201231709.g0NH9em421753@saturn.cs.uml.edu>
In-Reply-To: <20020123.034755.104030619.davem@redhat.com>
	<200201231709.g0NH9em421753@saturn.cs.uml.edu>
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   From: "Albert D. Cahalan" <acahalan@cs.uml.edu>
   Date: Wed, 23 Jan 2002 12:09:40 -0500 (EST)

   > Yes there most certainly are.  The driver's MMAP method can fully edit
   > the page protection attributes for that mmap area as it pleases.
   
   That doesn't help for MAP_ANON pages.

But it helps _THIS_ case, DRM(dma_mmap) is where all AGP memory comes
from and we can control the page protections for every page there.

If you want to start a thread about controlling cacheability
generically from mmap() or whatever idea you have, please
start a different thread and change the Subject.
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