From: Rik van Riel <riel@redhat.com>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Larry Woodman <lwoodman@redhat.com>
Subject: Re: [PATCH 3/7] VM_LOCKED check don't need pte lock
Date: Sun, 06 Dec 2009 14:41:54 -0500 [thread overview]
Message-ID: <4B1C0902.1050209@redhat.com> (raw)
In-Reply-To: <20091204174217.589A.A69D9226@jp.fujitsu.com>
On 12/04/2009 03:42 AM, KOSAKI Motohiro wrote:
> From 24f910b1ac966c21ea5aab825d1f26815b760304 Mon Sep 17 00:00:00 2001
> From: KOSAKI Motohiro<kosaki.motohiro@jp.fujitsu.com>
> Date: Thu, 3 Dec 2009 16:06:47 +0900
> Subject: [PATCH 3/7] VM_LOCKED check don't need pte lock
>
> Currently, page_referenced_one() check VM_LOCKED after taking ptelock.
> But it's unnecessary. We can check VM_LOCKED before to take lock.
>
> This patch does it.
Nice optimization.
> Signed-off-by: KOSAKI Motohiro<kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
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next prev parent reply other threads:[~2009-12-06 19:42 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-04 8:40 [RFC][PATCH 0/7] some page_referenced() improvement KOSAKI Motohiro
2009-12-04 8:41 ` [PATCH 1/7] Replace page_mapping_inuse() with page_mapped() KOSAKI Motohiro
2009-12-07 11:27 ` Johannes Weiner
2009-12-04 8:42 ` [PATCH 2/7] Introduce __page_check_address KOSAKI Motohiro
2009-12-06 14:55 ` Rik van Riel
2009-12-04 8:42 ` [PATCH 3/7] VM_LOCKED check don't need pte lock KOSAKI Motohiro
2009-12-06 19:41 ` Rik van Riel [this message]
2009-12-04 8:43 ` [PATCH 4/7] Replace page_referenced() with wipe_page_reference() KOSAKI Motohiro
2009-12-06 20:31 ` Rik van Riel
2009-12-04 8:44 ` [PATCH 5/7] Don't deactivate the page if trylock_page() is failed KOSAKI Motohiro
2009-12-06 20:34 ` Rik van Riel
2009-12-04 8:45 ` [PATCH 6/7] wipe_page_reference return SWAP_AGAIN if VM pressulre is low and lock contention is detected KOSAKI Motohiro
2009-12-06 21:01 ` Rik van Riel
2009-12-04 8:46 ` [PATCH 7/7] Try to mark PG_mlocked if wipe_page_reference find VM_LOCKED vma KOSAKI Motohiro
2009-12-06 21:03 ` Rik van Riel
2009-12-07 9:25 ` [RFC][PATCH 0/7] some page_referenced() improvement KOSAKI Motohiro
2009-12-07 11:36 ` [early RFC][PATCH 8/7] vmscan: Don't deactivate many touched page KOSAKI Motohiro
2009-12-07 18:10 ` Rik van Riel
2009-12-08 6:27 ` KOSAKI Motohiro
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