From: Mark Lord <kernel@teksavvy.com>
To: Greg Freemyer <greg.freemyer@gmail.com>
Cc: Ric Wheeler <rwheeler@redhat.com>,
sandeen@redhat.com, Eric Sandeen <esandeen@redhat.com>,
Jeff Moyer <jmoyer@redhat.com>,
Lukas Czerner <lczerner@redhat.com>,
linux-ext4@vger.kernel.org, Edward Shishkin <eshishki@redhat.com>,
Christoph Hellwig <hch@infradead.org>,
James Bottomley <James.Bottomley@hansenpartnership.com>
Subject: Re: [PATCH 2/2] Add batched discard support for ext4.
Date: Wed, 21 Apr 2010 17:59:07 -0400 [thread overview]
Message-ID: <4BCF752B.6050502@teksavvy.com> (raw)
In-Reply-To: <n2x87f94c371004211447w1e57ae43j4c988cf0205d7ec2@mail.gmail.com>
On 21/04/10 05:47 PM, Greg Freemyer wrote:
>
> The ATA-8 spec. supports vectored trims and requires a minimum of 255
> sectors worth of range payload be supported. That equates to a single
> trim being able to trim thousands of ranges in one command.
>
> Mark Lord has benchmarked in found a vectored trim to be drastically
> faster than calling trim individually for each of those ranges.
..
Does anyone have an Intel-based SSD they could spare? :)
Rumour has it they they do not comply with the ATA-8 spec for TRIM,
in that they don't support more than one "sector" of range data.
The SSDs I have here all support much more than that.
Still, even if we just do a single 512-byte payload of TRIM ranges,
it would be a huge win.
Cheers
next prev parent reply other threads:[~2010-04-21 21:59 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-19 10:55 Ext4: batched discard support Lukas Czerner
2010-04-19 10:55 ` [PATCH 1/2] Add ioctl FITRIM Lukas Czerner
2010-04-19 10:55 ` [PATCH 2/2] Add batched discard support for ext4 Lukas Czerner
2010-04-20 21:21 ` Greg Freemyer
2010-04-21 2:26 ` Mark Lord
2010-04-21 2:45 ` Eric Sandeen
2010-04-21 18:59 ` Greg Freemyer
2010-04-21 19:04 ` Ric Wheeler
2010-04-21 19:22 ` Jeff Moyer
2010-04-21 20:44 ` Greg Freemyer
2010-04-21 20:53 ` Greg Freemyer
2010-04-21 21:01 ` Eric Sandeen
2010-04-21 21:03 ` Ric Wheeler
2010-04-21 21:47 ` Greg Freemyer
2010-04-21 21:56 ` James Bottomley
2010-04-21 21:59 ` Mark Lord [this message]
2010-04-23 8:23 ` Lukas Czerner
2010-04-24 13:24 ` Greg Freemyer
2010-04-24 13:48 ` Ric Wheeler
2010-04-24 14:30 ` Greg Freemyer
2010-04-24 14:43 ` Eric Sandeen
2010-04-24 15:03 ` Greg Freemyer
2010-04-24 17:04 ` Ric Wheeler
2010-04-24 18:30 ` Greg Freemyer
2010-04-24 18:41 ` Ric Wheeler
2010-04-26 14:00 ` Mark Lord
2010-04-26 14:42 ` Martin K. Petersen
2010-04-26 15:27 ` Greg Freemyer
2010-04-26 15:51 ` Lukas Czerner
2010-04-28 1:25 ` Mark Lord
2010-04-26 15:48 ` Ric Wheeler
2010-04-24 19:06 ` Martin K. Petersen
2010-04-26 14:03 ` Mark Lord
2010-04-24 18:39 ` Martin K. Petersen
2010-04-26 16:55 ` Jan Kara
2010-04-26 17:46 ` Lukas Czerner
2010-04-26 17:52 ` Ric Wheeler
2010-04-26 18:14 ` Lukas Czerner
2010-04-26 18:28 ` Jeff Moyer
2010-04-26 18:38 ` [PATCH 2/2] Add batched discard support for ext4 - using rbtree Lukas Czerner
2010-04-26 18:42 ` Lukas Czerner
2010-04-27 15:29 ` Edward Shishkin
2010-04-21 20:52 ` [PATCH 2/2] Add batched discard support for ext4 Greg Freemyer
2010-04-19 16:20 ` Ext4: batched discard support Greg Freemyer
2010-04-19 16:30 ` Eric Sandeen
2010-04-19 17:58 ` Greg Freemyer
2010-04-19 18:04 ` Ric Wheeler
2010-04-20 20:24 ` Mark Lord
2010-04-20 20:34 ` Mark Lord
-- strict thread matches above, loose matches on Subject: below --
2010-07-07 7:53 Ext4: batched discard support - simplified version Lukas Czerner
2010-07-07 7:53 ` [PATCH 2/2] Add batched discard support for ext4 Lukas Czerner
2010-07-14 8:33 ` Dmitry Monakhov
2010-07-14 9:40 ` Lukas Czerner
2010-07-14 10:03 ` Dmitry Monakhov
2010-07-14 11:43 ` Lukas Czerner
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