From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
To: Pierre Ossman <drzeus-list@drzeus.cx>
Cc: Jens Axboe <jens.axboe@oracle.com>,
linux-fsdevel@vger.kernel.org,
David Woodhouse <dwmw2@infradead.org>
Subject: Re: [PATCH 0/2] MMC discard support (was [PATCH 0/7] Discard requests, v2)
Date: Sat, 23 Aug 2008 08:59:11 +0900 [thread overview]
Message-ID: <87vdxs7ga8.fsf@devron.myhome.or.jp> (raw)
In-Reply-To: <20080823010255.1b4ad88c@mjolnir.drzeus.cx> (Pierre Ossman's message of "Sat, 23 Aug 2008 01:02:55 +0200")
Pierre Ossman <drzeus-list@drzeus.cx> writes:
> On Fri, 22 Aug 2008 23:49:07 +0900
> OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> wrote:
>
>>
>> That doesn't have improvement? E.g. it means the results
>>
>> dd if=/dev/zero of=/dev/xxx
>> and
>> ./discard_all /dev/xxx
>> dd if=/dev/zero of=/dev/xxx
>>
>> are same? Or FAT doesn't have?
>
> I have tried those two and others, and I cannot see any noticeable
> difference in performance. Please perform your own tests though as I
> might have overlooked something.
I see, sounds like erase commands of sd/mmc was ignored. It's
interesting results, and I'd like to test and see the detail of it,
however, unfortunately I don't have proper devices now.
Anyway, thanks for info.
--
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
next prev parent reply other threads:[~2008-08-22 23:59 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-09 16:26 [PATCH 0/7] Discard requests, v2 David Woodhouse
2008-08-09 16:29 ` [PATCH 1/7] [BLOCK] Fix typo causing compile error in blk_queue_bounce() David Woodhouse
2008-08-09 16:30 ` [PATCH 2/7] [BLOCK] Fix up comments about matching flags between bio and rq David Woodhouse
2008-08-09 16:30 ` [PATCH 3/7] [BLOCK] Add 'discard' request handling David Woodhouse
2008-08-09 20:39 ` OGAWA Hirofumi
2008-08-09 21:37 ` David Woodhouse
2008-08-10 6:32 ` David Woodhouse
2008-08-09 16:31 ` [PATCH 4/7] [FAT] Let the block device know when sectors can be discarded David Woodhouse
2008-08-09 16:32 ` [PATCH 5/7] [MTD] Support 'discard sectors' operation in translation layer support core David Woodhouse
2008-08-09 16:33 ` [PATCH 6/7] [MTD] [FTL] Support 'discard sectors' operation David Woodhouse
2008-08-09 16:33 ` [PATCH 7/7] [BLOCK] Allow elevators to sort/merge discard requests David Woodhouse
2008-10-03 20:29 ` Andrew Morton
2008-10-07 12:07 ` Jens Axboe
2008-08-09 22:48 ` [PATCH 0/7] Discard requests, v2 OGAWA Hirofumi
2008-08-10 10:25 ` David Woodhouse
2008-08-10 16:37 ` Jamie Lokier
2008-08-10 17:55 ` OGAWA Hirofumi
2008-08-10 20:07 ` David Woodhouse
2008-08-10 21:40 ` OGAWA Hirofumi
2008-08-11 9:40 ` David Woodhouse
2008-08-11 10:25 ` OGAWA Hirofumi
2008-08-11 13:17 ` David Woodhouse
2008-08-11 14:21 ` OGAWA Hirofumi
2008-08-10 10:29 ` [PATCH 8/7] blktrace: support discard requests David Woodhouse
2008-08-10 10:35 ` [USERSPACE PATCH] " David Woodhouse
2008-08-15 8:43 ` Jens Axboe
2008-08-15 9:01 ` David Woodhouse
2008-08-15 9:08 ` Jens Axboe
2008-08-10 10:41 ` [PATCH 8/7] " David Woodhouse
2008-08-13 11:17 ` Jens Axboe
2008-08-10 11:48 ` [PATCH 9/7] blktrace: simplify flags handling in __blk_add_trace David Woodhouse
2008-08-10 11:50 ` David Woodhouse
2008-08-11 15:11 ` [PATCH 10/7] [BLOCK] Add BLKDISCARD ioctl to allow userspace to discard sectors David Woodhouse
2008-08-11 18:27 ` Matthew Wilcox
2008-08-11 20:52 ` David Woodhouse
2008-08-12 9:14 ` [PATCH 0/7] Discard requests, v2 Jens Axboe
2008-08-12 10:00 ` David Woodhouse
2008-08-12 10:54 ` Jens Axboe
2008-08-12 11:16 ` David Woodhouse
2008-08-12 12:19 ` David Woodhouse
2008-08-12 12:53 ` Jens Axboe
2008-08-12 13:04 ` David Woodhouse
2008-08-12 15:47 ` David Woodhouse
2008-08-12 18:04 ` Jamie Lokier
2008-08-13 10:22 ` David Woodhouse
2008-08-13 12:19 ` Jamie Lokier
2008-08-13 12:26 ` David Woodhouse
2008-08-13 11:15 ` Jens Axboe
2008-08-13 11:23 ` David Woodhouse
2008-08-13 11:32 ` Jens Axboe
2008-08-13 11:34 ` David Woodhouse
2008-08-13 12:07 ` David Woodhouse
2008-08-14 7:49 ` Jens Axboe
2008-08-14 7:52 ` David Woodhouse
2008-08-14 7:25 ` David Woodhouse
2008-08-14 7:33 ` Stephen Rothwell
2008-08-14 7:37 ` David Woodhouse
2008-08-14 7:42 ` Jens Axboe
2008-08-14 7:46 ` Stephen Rothwell
2008-08-12 18:10 ` Jamie Lokier
2008-08-13 10:20 ` David Woodhouse
2008-08-12 11:42 ` Matthew Wilcox
2008-08-12 11:46 ` David Woodhouse
2008-08-12 19:53 ` OGAWA Hirofumi
2008-08-12 20:11 ` OGAWA Hirofumi
2008-08-13 11:39 ` [PATCH 11/7] Kill REQ_TYPE_FLUSH David Woodhouse
2008-08-13 11:58 ` Geert Uytterhoeven
2008-08-13 12:43 ` David Woodhouse
2008-08-13 15:40 ` Jens Axboe
2008-08-13 15:46 ` David Woodhouse
2008-08-16 17:08 ` [PATCH 0/2] MMC discard support (was [PATCH 0/7] Discard requests, v2) Pierre Ossman
2008-08-16 17:11 ` [PATCH 1/2] mmc_block: factor out the mmc request handling Pierre Ossman
2008-08-16 17:12 ` [PATCH 2/2] mmc_block: erase discarded blocks Pierre Ossman
2008-08-16 17:38 ` [PATCH 0/2] MMC discard support (was [PATCH 0/7] Discard requests, v2) David Woodhouse
2008-08-16 17:51 ` Pierre Ossman
2008-08-22 9:24 ` Jens Axboe
2008-08-22 9:45 ` David Woodhouse
2008-08-22 10:50 ` Jens Axboe
2008-08-22 10:58 ` David Woodhouse
2008-08-22 11:11 ` Pierre Ossman
2008-08-22 11:19 ` Jens Axboe
2008-08-22 11:13 ` Pierre Ossman
2008-08-22 11:20 ` Jens Axboe
2008-08-22 14:49 ` OGAWA Hirofumi
2008-08-22 23:02 ` Pierre Ossman
2008-08-22 23:59 ` OGAWA Hirofumi [this message]
2008-08-24 11:23 ` Pierre Ossman
2008-08-24 13:39 ` OGAWA Hirofumi
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