Date: Fri, 12 Mar 2004 13:48:21 -0500 (EST)
From: Rik van Riel <riel@redhat.com>
To: Linus Torvalds <torvalds@osdl.org>
cc: Andrea Arcangeli <andrea@suse.de>, Hugh Dickins <hugh@veritas.com>,
       Ingo Molnar <mingo@elte.hu>, Andrew Morton <akpm@osdl.org>,
       <linux-kernel@vger.kernel.org>,
       William Lee Irwin III <wli@holomorphy.com>
Subject: Re: anon_vma RFC2
In-Reply-To: <Pine.LNX.4.58.0403120956370.1045@ppc970.osdl.org>
Message-ID: <Pine.LNX.4.44.0403121346580.6494-100000@chimarrao.boston.redhat.com>
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On Fri, 12 Mar 2004, Linus Torvalds wrote:

> I think your approach could work (reverse map by having separate address
> spaces for unrelated processes), but I don't see any good "page->index"  
> allocation scheme that is implementable.

> Or did I totally mis-understand what you were proposing?

You're absolutely right.  I am still trying to come up with
a way to do this.

Note that since we count page->index in PAGE_SIZE unit we
have PAGE_SIZE times as much space as a process can take,
so we definately have enough address space to come up with
a creative allocation scheme.

I just can't think of any now ...

-- 
"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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