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 04:50:55 +0100 [thread overview]
Message-ID: <20020124045055.F20533@athlon.random> (raw)
In-Reply-To: <20020123.121857.18310310.davem@redhat.com>; from davem@redhat.com on Wed, Jan 23, 2002 at 12:18:57PM -0800
On Wed, Jan 23, 2002 at 12:18:57PM -0800, David S. Miller wrote:
>
> OK, so only the _pgd_ quicklist is questionable and the
> _pte_ quicklist is fine ?
>
> That is my understanding.
pgd cache is fine too, the page fault will update the pgd using
swapper_pg_dir accordingly if needed. The swapper_pg_dir will only fault
in new pmd, it will never deallocate them (vfree only invalidates the
pte and free the pages), so it's safe. If vfree would deallocate them
just a simple context switch would break, no matter of the pgd cache.
Andrea
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next prev parent reply other threads:[~2002-01-24 3:50 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 [this message]
2002-01-24 3:46 ` Andrea Arcangeli
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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