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From: Tejun Heo <teheo@suse.de>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	dwmw2@infradead.org, Nick Piggin <npiggin@suse.de>,
	Jens Axboe <jens.axboe@oracle.com>,
	IDE/ATA development list <linux-ide@v>
Cc: Matthew Wilcox <matthew@wil.cx>
Subject: Re: about TRIM/DISCARD support and barriers
Date: Sun, 23 Nov 2008 16:11:56 +0900	[thread overview]
Message-ID: <4929023C.2060302@suse.de> (raw)
In-Reply-To: <4928E010.4090801@kernel.org>

Hello,

cc'ing Matthew whom I forgot to cc in the first message.  Matthew, the
original message is...

 http://lkml.org/lkml/2008/11/22/260

Tejun Heo wrote:
> Dongjun Shin who works for Samsung SSD dep asked me about libata TRIM
> support and pointed me to the new DISCARD support David Woodhouse got
> merged for 2.6.28.  I took a look at the code and blk-layer
> interface-wise we seemed to be ready both for filesystems and userland
> (so that fsck or something which runs background can mark unused
> blocks) but there doesn't seem to be any low level driver which
> actually implements ->prepare_discard_fn or fs which sets the DISCARD
> flag.

Dongjun, the only doc I can find about ATA TRIM is the following one.

 http://t13.org/Documents/UploadedDocuments/docs2007/e07154r3-Data_Set_Management_Proposal_for_ATA-ACS2.pdf

And AFAICS this hasn't made into ACS yet.  Is this what you guys are
gonna implement and Windows7 is gonna use?

Thanks.

-- 
tejun

WARNING: multiple messages have this Message-ID (diff)
From: Tejun Heo <teheo@suse.de>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	dwmw2@infradead.org, Nick Piggin <npiggin@suse.de>,
	Jens Axboe <jens.axboe@oracle.com>,
	IDE/ATA development list <linux-ide@vger.kernel.org>,
	Jeff Garzik <jeff@garzik.org>, Dongjun Shin <djshin90@gmail.com>,
	chris.mason@oracle.com, Jens Axboe <jens.axboe@oracle.com>
Cc: Matthew Wilcox <matthew@wil.cx>
Subject: Re: about TRIM/DISCARD support and barriers
Date: Sun, 23 Nov 2008 16:11:56 +0900	[thread overview]
Message-ID: <4929023C.2060302@suse.de> (raw)
In-Reply-To: <4928E010.4090801@kernel.org>

Hello,

cc'ing Matthew whom I forgot to cc in the first message.  Matthew, the
original message is...

 http://lkml.org/lkml/2008/11/22/260

Tejun Heo wrote:
> Dongjun Shin who works for Samsung SSD dep asked me about libata TRIM
> support and pointed me to the new DISCARD support David Woodhouse got
> merged for 2.6.28.  I took a look at the code and blk-layer
> interface-wise we seemed to be ready both for filesystems and userland
> (so that fsck or something which runs background can mark unused
> blocks) but there doesn't seem to be any low level driver which
> actually implements ->prepare_discard_fn or fs which sets the DISCARD
> flag.

Dongjun, the only doc I can find about ATA TRIM is the following one.

 http://t13.org/Documents/UploadedDocuments/docs2007/e07154r3-Data_Set_Management_Proposal_for_ATA-ACS2.pdf

And AFAICS this hasn't made into ACS yet.  Is this what you guys are
gonna implement and Windows7 is gonna use?

Thanks.

-- 
tejun

  reply	other threads:[~2008-11-23  7:12 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-11-23  4:46 about TRIM/DISCARD support and barriers Tejun Heo
2008-11-23  4:46 ` Tejun Heo
2008-11-23  7:11 ` Tejun Heo [this message]
2008-11-23  7:11   ` Tejun Heo
2008-11-23  7:57   ` Tejun Heo
2008-11-23  7:57     ` Tejun Heo
2008-11-24  5:40     ` Dongjun Shin
2008-11-24  5:45       ` Tejun Heo
2008-11-24  5:57       ` James Bottomley
2008-11-23 12:35   ` Matthew Wilcox
2008-11-23 13:39     ` David Woodhouse
2008-11-23 22:52       ` James Bottomley
2008-11-24  9:03         ` David Woodhouse
2008-11-24 18:42           ` James Bottomley
2008-11-24 18:52             ` David Woodhouse
2008-11-24 18:57               ` Jens Axboe
2008-11-24 19:08                 ` James Bottomley
2008-11-25  9:16                   ` Jens Axboe
2008-11-24 19:09               ` James Bottomley
2008-11-25  3:28           ` Matthew Wilcox
2008-11-25  9:15             ` Jens Axboe
2008-11-24  3:01       ` Theodore Tso
2008-11-28 13:21 ` Raz Ben-Yehuda
2008-11-29 22:57   ` Tejun Heo

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