From: "Luck, Tony" <tony.luck@intel.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: nickpiggin@yahoo.com.au, Jeff Garzik <jgarzik@pobox.com>,
torvalds@osdl.org, hugh@veritas.com, benh@kernel.crashing.org,
linux-mm@kvack.org, linux-ia64@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: RE: Anticipatory prefaulting in the page fault handler V1
Date: Wed, 8 Dec 2004 10:31:20 -0800 [thread overview]
Message-ID: <B8E391BBE9FE384DAA4C5C003888BE6F0284433D@scsmsx401.amr.corp.intel.com> (raw)
>We could use that as a way to switch of the preallocation. How
>expensive is that check?
If you already looked up the vma, then it is very cheap. Just
check for VM_RAND_READ in vma->vm_flags.
-Tony
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next reply other threads:[~2004-12-08 18:31 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-08 18:31 Luck, Tony [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-12-08 17:44 Luck, Tony
2004-12-08 17:57 ` Christoph Lameter
2004-11-22 15:00 page fault scalability patch V11 [1/7]: sloppy rss Hugh Dickins
2004-11-22 21:50 ` deferred rss update instead of " Christoph Lameter
2004-11-22 22:22 ` Linus Torvalds
2004-11-22 22:27 ` Christoph Lameter
2004-11-22 22:40 ` Linus Torvalds
2004-12-01 23:41 ` page fault scalability patch V12 [0/7]: Overview and performance tests Christoph Lameter
2004-12-02 0:10 ` Linus Torvalds
2004-12-02 6:21 ` Jeff Garzik
2004-12-02 6:34 ` Andrew Morton
2004-12-02 6:48 ` Jeff Garzik
2004-12-02 7:02 ` Andrew Morton
2004-12-02 7:26 ` Martin J. Bligh
2004-12-02 7:31 ` Jeff Garzik
2004-12-02 18:10 ` cliff white
2004-12-08 17:24 ` Anticipatory prefaulting in the page fault handler V1 Christoph Lameter
2004-12-08 17:33 ` Jesse Barnes
2004-12-08 17:56 ` Christoph Lameter
2004-12-08 18:33 ` Jesse Barnes
2004-12-08 21:26 ` David S. Miller
2004-12-08 21:42 ` Linus Torvalds
2004-12-08 17:55 ` Dave Hansen
2004-12-08 19:07 ` Martin J. Bligh
2004-12-08 22:50 ` Martin J. Bligh
2004-12-09 19:32 ` Christoph Lameter
2004-12-13 14:30 ` Akinobu Mita
2004-12-13 17:10 ` Christoph Lameter
2004-12-13 22:16 ` Martin J. Bligh
2004-12-14 12:24 ` Akinobu Mita
2004-12-14 15:25 ` Akinobu Mita
2004-12-14 20:25 ` Christoph Lameter
2004-12-09 10:57 ` Pavel Machek
2004-12-09 11:32 ` Nick Piggin
2004-12-09 17:05 ` Christoph Lameter
2004-12-14 15:28 ` Adam Litke
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