From: Manfred Spraul <manfred@colorfullife.com>
To: Hugh Dickins <hugh@veritas.com>, Andrew Morton <akpm@digeo.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] flush_cache_page while pte valid
Date: Mon, 11 Nov 2002 22:20:30 +0100 [thread overview]
Message-ID: <3DD01F1E.2040705@colorfullife.com> (raw)
> /* Nuke the page table entry. */
>+ flush_cache_page(vma, address);
> pte = ptep_get_and_clear(ptep);
> flush_tlb_page(vma, address);
>- flush_cache_page(vma, address);
>
Is it correct that this are 3 arch hooks that must appear back to back?
What about one hook with all parameters?
pte = ptep_get_and_clear_and_flush(ptep, vma, address);
The current implementation just asks for such errors.
Documentation:
ptep_get_and_clear_and_flush() removes the page table entry *ptep from the page tables and clears all caches (tlb, cpu cache if virtually tagged).
The return value contains the final value of the pte. The critical information is the dirty bit in the pte - on SMP one cpu can call ptep_get_and_clear_and_flush() while another cpu accesses the mmap'ing from user space.
--
Manfred
next reply other threads:[~2002-11-11 21:13 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-11 21:20 Manfred Spraul [this message]
2002-11-12 0:37 ` [PATCH] flush_cache_page while pte valid Russell King
-- strict thread matches above, loose matches on Subject: below --
2002-11-12 21:32 Ulrich Weigand
2002-11-12 20:53 Manfred Spraul
2002-11-12 22:01 ` David S. Miller
2002-11-12 1:08 Ulrich Weigand
2002-11-11 18:25 Hugh Dickins
2002-11-11 18:35 ` Andrew Morton
2002-11-11 23:19 ` David S. Miller
2002-11-12 6:53 ` Hugh Dickins
2002-11-12 6:53 ` David S. Miller
2002-11-12 14:49 ` Rik van Riel
2002-11-12 21:45 ` David S. Miller
2002-11-12 17:43 ` Hugh Dickins
2002-11-12 21:51 ` David S. Miller
2002-11-12 22:59 ` Hugh Dickins
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