Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id <S289172AbSBSBXQ>; Mon, 18 Feb 2002 20:23:16 -0500
Received: (majordomo@vger.kernel.org) by vger.kernel.org
	id <S289216AbSBSBXG>; Mon, 18 Feb 2002 20:23:06 -0500
Received: from garrincha.netbank.com.br ([200.203.199.88]:61711 "HELO
	netbank.com.br") by vger.kernel.org with SMTP id <S289172AbSBSBXA>;
	Mon, 18 Feb 2002 20:23:00 -0500
Date: Mon, 18 Feb 2002 22:22:44 -0300 (BRT)
From: Rik van Riel <riel@conectiva.com.br>
X-X-Sender: <riel@imladris.surriel.com>
To: Linus Torvalds <torvalds@transmeta.com>
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>
Subject: Re: [RFC] Page table sharing
In-Reply-To: <Pine.LNX.4.33.0202181631120.24405-100000@home.transmeta.com>
Message-ID: <Pine.LNX.4.33L.0202182221040.1930-100000@imladris.surriel.com>
X-spambait: aardvark@kernelnewbies.org
X-spammeplease: aardvark@nl.linux.org
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org
X-Mailing-List: linux-kernel@vger.kernel.org

On Mon, 18 Feb 2002, Linus Torvalds wrote:
> On Tue, 19 Feb 2002, Daniel Phillips wrote:
> >
> > Thanks, here it is again.
>
> Daniel, there's something wrong in the locking.

> Does anybody see any reason why this doesn't work totally without the
> lock?

We'll need protection from the swapout code.  It would be
embarassing if the page fault handler would run for one
mm while kswapd was holding the page_table_lock for another
mm.

I'm not sure how the page_table_share_lock is supposed
to fix that one, though.

regards,

Rik
-- 
"Linux holds advantages over the single-vendor commercial OS"
    -- Microsoft's "Competing with Linux" document

http://www.surriel.com/		http://distro.conectiva.com/


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/