From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from proofpoint1.lanl.gov (proofpoint1.lanl.gov [204.121.3.25]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id A1889DDDB2 for ; Thu, 5 Mar 2009 12:02:23 +1100 (EST) Message-ID: <49AF1B16.5000907@lanl.gov> Date: Wed, 04 Mar 2009 17:21:42 -0700 From: "Marcus G. Daniels" MIME-Version: 1.0 To: Geert Uytterhoeven Subject: Re: [Cbe-oss-dev] [PATCH/RFC] ps3/block: Add ps3vram-ng driver for accessing video RAM as block device References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-15; format=flowed Cc: Jens Axboe , Arnd Bergmann , Linux Kernel Development , Jim Paris , Linux/PPC Development , linux-mtd@lists.infradead.org, Vivien Chappelier , Cell Broadband Engine OSS Development List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Geert Uytterhoeven wrote: > Ideally, we think it would be best if the existing MTD-based ps3vram driver > would be replaced by the new block-based ps3vram driver before 2.6.29 is > released. This would relieve the burden of supporting two different swap space > schemes on PS3 (swap on /dev/mtdblock0 vs. /dev/ps3vram) from the distro > maintainer's shoulders, as in that case there would never have been a stable > kernel version containing the MTD-based ps3vram driver. > [..] > - ps3vram-ng is faster than ps3vram: > o 1 MiB blocks: +50% (read), +5% (write) > o 4 KiB blocks: +50% (read), +5% (write) > o 512 B blocks: +10% (read), +10% (write) > Fwiw, it's a useful swap device, since space is so limited -- the performance improvements are certainly appealing too. Marcus