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Re: [RFC] Page table sharing
- To: Rik van Riel <riel@conectiva.com.br>
- Subject: Re: [RFC] Page table sharing
- From: Linus Torvalds <torvalds@transmeta.com>
- Date: Mon, 18 Feb 2002 17:48:11 -0800 (PST)
- cc: Daniel Phillips <phillips@bonn-fries.net>,Hugh Dickins <hugh@veritas.com>, <dmccr@us.ibm.com>,Kernel Mailing List <linux-kernel@vger.kernel.org>,<linux-mm@kvack.org>, Robert Love <rml@tech9.net>,<mingo@redhat.co>, Andrew Morton <akpm@zip.com.au>,<manfred@colorfullife.com>, <wli@holomorphy.com>
- Fake-Sender: owner-linux-mm@kvack.org
- In-Reply-To: <Pine.LNX.4.33L.0202182221040.1930-100000@imladris.surriel.com>
- Original-Recipient: rfc822;linux-mm-archive@humbolt.geo.uu.nl
- Sender: Rik van Riel <riel@nl.linux.org>
On Mon, 18 Feb 2002, Rik van Riel wrote:
>
> We'll need protection from the swapout code.
Absolutely NOT.
If the swapout code unshares or shares the PMD, that's a major bug.
The swapout code doesn't need to know one way or the other, because the
swapout code never actually touches the pmd itself, it just follows the
pointers - it doesn't ever need to worry about the pmd counts at all.
Linus
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