From: Ingo Molnar <mingo@elte.hu>
To: "David S. Miller" <davem@redhat.com>
Cc: Linus Torvalds <torvalds@transmeta.com>,
blah@kvack.org, "Theodore Y. Ts'o" <tytso@mit.edu>,
linux-kernel@vger.kernel.org,
MM mailing list <linux-mm@kvack.org>
Subject: Re: [RFC] atomic pte updates for x86 smp
Date: Thu, 12 Oct 2000 12:05:48 +0200 (CEST) [thread overview]
Message-ID: <Pine.LNX.4.21.0010121126190.4301-100000@elte.hu> (raw)
In-Reply-To: <200010120856.BAA08092@pizda.ninka.net>
On Thu, 12 Oct 2000, David S. Miller wrote:
> clear neither user-space pgds, nor user-space pmds in PAE mode
>
> Eh?
>
> munmap() --> clear_page_tables() --> free_one_pgd() --> pgd_clear
you are right, i was focused too much on the swapping case. I dont think
munmap() is a problem in the PAE case. pgd_clear() should stay a 64-bit
operation (like in Ben's patch) because we could get a legitimate TLB
flush between two 32-bit writes. (the 4 pgd entries are otherwise cached
in the CPU core, only TLB flushes reload them.)
Ingo
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next prev parent reply other threads:[~2000-10-12 10:05 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200010090419.e994JQT09775@trampoline.thunk.org>
2000-10-10 20:53 ` Updated 2.4 TODO List Rik van Riel
2000-10-11 0:06 ` 2.4.0test9 vm: disappointing streaming i/o under load Chris Evans
2000-10-11 11:38 ` Eric Lowe
2000-10-11 20:59 ` Chris Evans
2000-10-11 22:10 ` Roger Larsson
2000-10-11 22:46 ` Chris Evans
2000-10-13 16:57 ` Rik van Riel
2000-10-11 18:38 ` Updated 2.4 TODO List tytso
2000-10-11 23:52 ` [RFC] atomic pte updates for x86 smp Ben LaHaise
2000-10-12 0:09 ` Linus Torvalds
2000-10-12 4:03 ` Benjamin C.R. LaHaise
2000-10-12 4:06 ` David S. Miller
2000-10-12 4:31 ` Cort Dougan
2000-10-12 4:37 ` Benjamin C.R. LaHaise
2000-10-12 6:42 ` Linus Torvalds
2000-10-12 8:13 ` Ingo Molnar
2000-10-12 8:56 ` David S. Miller
2000-10-12 10:05 ` Ingo Molnar [this message]
2000-10-12 11:10 ` Ingo Molnar
2000-10-12 15:10 ` Benjamin C.R. LaHaise
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