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Date: Tue, 12 Nov 2002 13:51:47 -0800 (PST)
Message-Id: <20021112.135147.21135668.davem@redhat.com>
To: hugh@veritas.com
Cc: akpm@digeo.com, dmccr@us.ibm.com, riel@conectiva.com.br,
       linux-kernel@vger.kernel.org
Subject: Re: [PATCH] flush_cache_page while pte valid 
From: "David S. Miller" <davem@redhat.com>
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References: <20021111.225333.122204472.davem@redhat.com>
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   From: Hugh Dickins <hugh@veritas.com>
   Date: Tue, 12 Nov 2002 17:43:40 +0000 (GMT)
   
   Sorry, I still don't get it.  If the flush_cache_page is doing something
   necessary, then won't a user access in between it and invalidating pte
   undo what was necessary?  And if it's not necessary, why do we do it?
   (For better performance would be a very good reason.)
   
If there are other writable mappings of the page, we can't swap
it out legally.
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