From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with ESMTP id 866F46B003D for ; Sun, 15 Mar 2009 06:28:06 -0400 (EDT) Date: Sun, 15 Mar 2009 10:27:51 +0000 From: Russell King - ARM Linux Subject: Re: [PATCH] [ARM] Flush only the needed range when unmapping a VMA Message-ID: <20090315102751.GD3963@n2100.arm.linux.org.uk> References: <49B54B2A.9090408@nokia.com> <1236690093-3037-1-git-send-email-Aaro.Koskinen@nokia.com> <20090312213006.GN7854@n2100.arm.linux.org.uk> <49BA4541.6000708@nokia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <49BA4541.6000708@nokia.com> Sender: owner-linux-mm@kvack.org To: Aaro Koskinen Cc: "linux-arm-kernel@lists.arm.linux.org.uk" , "linux-mm@kvack.org" , "hugh@veritas.com" List-ID: On Fri, Mar 13, 2009 at 01:36:33PM +0200, Aaro Koskinen wrote: > shm segment size 4096000 bytes > real 0m 0.12s > user 0m 0.02s > sys 0m 0.10s > shm segment size 8192000 bytes > real 0m 0.36s > user 0m 0.00s > sys 0m 0.35s ... > shm segment size 4096000 bytes > real 0m 0.07s > user 0m 0.01s > sys 0m 0.05s > shm segment size 8192000 bytes > real 0m 0.13s > user 0m 0.02s > sys 0m 0.10s Yes, that's quite a speedup. Can you provide some words in the patch description which indicate that we have about a 3x speed increase for 8M mappings, which only gets better for larger mappings? Given that this patch is now only touching ARM, is there any need to indicate that it was CC'd to Hugh when it gets committed? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org