From: Andrea Arcangeli <andrea@suse.de>
To: "David S. Miller" <davem@redhat.com>
Cc: riel@conectiva.com.br, linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH *] rmap VM, version 12
Date: Thu, 24 Jan 2002 04:46:57 +0100 [thread overview]
Message-ID: <20020124044657.E20533@athlon.random> (raw)
In-Reply-To: <20020123.110624.93021436.davem@redhat.com>; from davem@redhat.com on Wed, Jan 23, 2002 at 11:06:24AM -0800
On Wed, Jan 23, 2002 at 11:06:24AM -0800, David S. Miller wrote:
> 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.
the cache we're talking about here cannot cache anything, whatever is in
this cache must contain no information at all, otherwise the kernel
would crash anyway immediatly. Such code was disabled for no good reason
and there was nothing to fix there.
Andrea
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next prev parent reply other threads:[~2002-01-24 3:46 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-23 17:14 Rik van Riel
2002-01-23 18:44 ` David S. Miller
2002-01-23 18:57 ` Rik van Riel
2002-01-23 19:06 ` David S. Miller
2002-01-23 19:22 ` Rik van Riel
2002-01-23 19:28 ` David S. Miller
2002-01-23 19:36 ` Rik van Riel
2002-01-23 20:18 ` David S. Miller
2002-01-23 22:12 ` Rik van Riel
2002-01-24 3:50 ` Andrea Arcangeli
2002-01-24 3:46 ` Andrea Arcangeli [this message]
2002-01-23 19:15 ` Robert Love
2002-01-23 19:02 Badari Pulavarty
2002-01-23 19:05 ` Rik van Riel
2002-01-23 19:12 ` Andi Kleen
2002-01-23 19:11 Badari Pulavarty
2002-01-23 19:20 ` Rik van Riel
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