From: Geoff Levand <geoffrey.levand@am.sony.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>,
Jens Axboe <jens.axboe@oracle.com>, Jim Paris <jim@jtan.com>,
Vivien Chappelier <vivien.chappelier@free.fr>,
David Woodhouse <dwmw2@infradead.org>,
Arnd Bergmann <arnd@arndb.de>,
Linux/PPC Development <linuxppc-dev@ozlabs.org>,
Cell Broadband Engine OSS Development <cbe-oss-dev@ozlabs.org>,
Linux Kernel Development <linux-kernel@vger.kernel.org>,
linux-mtd@lists.infradead.org,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH] ps3/block: Replace mtd/ps3vram by block/ps3vram
Date: Mon, 9 Mar 2009 10:51:43 -0700 [thread overview]
Message-ID: <49B5572F.4010007@am.sony.com> (raw)
In-Reply-To: <alpine.LRH.2.00.0903061349010.16809@vixen.sonytel.be>
On 03/06/2009 04:54 AM, Geert Uytterhoeven wrote:
> Convert the PS3 Video RAM Storage Driver from an MTD driver to a plain block
> device driver.
>
> The ps3vram driver exposes unused video RAM on the PS3 as a block device
> suitable for storage or swap. Fast data transfer is achieved using a local
> cache in system RAM and DMA transfers via the GPU.
>
> The new driver is ca. 50% faster for reading, and ca. 10% for writing.
>
> arch/powerpc/platforms/ps3/Kconfig | 7 +
> drivers/block/Makefile | 1 +
> drivers/block/ps3vram.c | 865 ++++++++++++++++++++++++++++++++++++
> drivers/mtd/devices/Kconfig | 7 -
> drivers/mtd/devices/Makefile | 1 -
> drivers/mtd/devices/ps3vram.c | 768 --------------------------------
> 6 files changed, 873 insertions(+), 776 deletions(-)
> create mode 100644 drivers/block/ps3vram.c
> delete mode 100644 drivers/mtd/devices/ps3vram.c
Looks good, certainly an improvement.
Acked-by: Geoff Levand <geoffrey.levand@am.sony.com>
next prev parent reply other threads:[~2009-03-09 17:52 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-04 13:57 [PATCH/RFC] ps3/block: Add ps3vram-ng driver for accessing video RAM as block device Geert Uytterhoeven
2009-03-04 23:27 ` Benjamin Herrenschmidt
2009-03-05 6:54 ` Jens Axboe
2009-03-06 12:54 ` [PATCH] ps3/block: Replace mtd/ps3vram by block/ps3vram (was: Re: [PATCH/RFC] ps3/block: Add ps3vram-ng driver for accessing video RAM as block device) Geert Uytterhoeven
2009-03-09 17:51 ` Geoff Levand [this message]
2009-03-05 0:21 ` [Cbe-oss-dev] [PATCH/RFC] ps3/block: Add ps3vram-ng driver for accessing video RAM as block device Marcus G. Daniels
2009-03-05 7:17 ` Olaf Hering
2009-03-05 7:59 ` Geert Uytterhoeven
2009-03-05 10:24 ` Geert Uytterhoeven
2009-03-05 18:12 ` Olaf Hering
2009-03-05 8:37 ` Jens Axboe
2009-03-05 10:50 ` Geert Uytterhoeven
2009-03-05 11:09 ` Jens Axboe
2009-03-05 16:45 ` Geert Uytterhoeven
2009-03-06 7:46 ` Jens Axboe
2009-03-06 12:48 ` Geert Uytterhoeven
2009-03-06 12:58 ` Jens Axboe
2009-03-06 14:26 ` Geert Uytterhoeven
2009-03-06 19:03 ` Jens Axboe
2009-03-09 10:43 ` Geert Uytterhoeven
2009-03-09 10:48 ` Jens Axboe
2009-03-09 10:50 ` Jens Axboe
2009-03-09 10:52 ` Geert Uytterhoeven
2009-03-09 10:58 ` Jens Axboe
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