From: William Lee Irwin III <wli@holomorphy.com>
To: Russell King <rmk@arm.linux.org.uk>
Cc: linux-mm@kvack.org
Subject: Re: PTE aging, ptep_test_and_clear_young() and TLB
Date: Sat, 17 Apr 2004 13:43:02 -0700 [thread overview]
Message-ID: <20040417204302.GR743@holomorphy.com> (raw)
In-Reply-To: <20040417211506.C21974@flint.arm.linux.org.uk>
On Sat, Apr 17, 2004 at 09:15:06PM +0100, Russell King wrote:
> This in turn means that we need to replace ptep_test_and_clear_young()
> with ptep_clear_flush_young(), which in turn means we need the VMA and
> address. However, this implies introducing more code into
> page_referenced().
> Comments?
The address and mm should already be recoverable via the pte page
tagging technique. The vma is recoverable from that, albeit at some
cost (mm->page_table_lock acquisition + find_vma() call). OTOH unless
kswapd's going wild it should largely count as a slow path anyway.
-- wli
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next prev parent reply other threads:[~2004-04-17 20:43 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-17 20:15 PTE aging, ptep_test_and_clear_young() and TLB Russell King
2004-04-17 20:43 ` William Lee Irwin III [this message]
2004-04-18 9:36 ` Russell King
2004-04-18 9:39 ` William Lee Irwin III
2004-04-18 10:58 ` Hugh Dickins
2004-04-18 11:23 ` Russell King
2004-04-18 12:36 ` Hugh Dickins
2004-04-18 12:42 ` Russell King
2004-04-18 19:55 ` Russell King
2004-04-18 20:01 ` Russell King
2004-04-18 23:14 ` Hugh Dickins
2004-04-18 23:34 ` Russell King
2004-04-18 15:52 ` William Lee Irwin III
2004-04-18 10:42 ` Russell King
2004-04-18 15:12 ` William Lee Irwin III
2004-04-17 22:27 ` Hugh Dickins
2004-04-17 23:47 ` Anton Blanchard
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