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Re: [PATCH *] rmap VM, version 12

To: riel@conectiva.com.br
Subject: Re: [PATCH *] rmap VM, version 12
From: "David S. Miller" <davem@redhat.com>
Date: Wed, 23 Jan 2002 11:06:24 -0800 (PST)
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Fake-Sender: owner-linux-mm@kvack.org
In-Reply-To: <Pine.LNX.4.33L.0201231650450.32617-100000@imladris.surriel.com>
Original-Recipient: rfc822;linux-mm-archive@humbolt.geo.uu.nl
References: <20020123.104438.71552152.davem@redhat.com><Pine.LNX.4.33L.0201231650450.32617-100000@imladris.surriel.com>
Sender: Rik van Riel <riel@nl.linux.org>

   On Wed, 23 Jan 2002, David S. Miller wrote:

   > The problem is that when vmalloc() or whatever kernel mappings change
   > you have to update all the quicklist page tables to match.

   Actually, this is just using the pte_free_fast() and
   {get,free}_pgd_fast() functions on non-pae machines.

Rofl, you can't just do that.  The page tables cache caches the kernel
mappings and if you don't update them properly on SMP you die.

I am seeing reports of SMP failing with rmap12 but not previous
patches.  You need to revert this I think.
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Follow-Ups:
- Re: [PATCH *] rmap VM, version 12
  - From: Rik van Riel <riel@conectiva.com.br>
- Re: [PATCH *] rmap VM, version 12
  - From: Andrea Arcangeli <andrea@suse.de>

References:
- Re: [PATCH *] rmap VM, version 12
  - From: "David S. Miller" <davem@redhat.com>
- Re: [PATCH *] rmap VM, version 12
  - From: Rik van Riel <riel@conectiva.com.br>

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