From: Jeff Garzik <jeff@garzik.org>
To: Jeff Layton <laytonjb@att.net>
Cc: Matthew Wilcox <matthew@wil.cx>, linux-fsdevel@vger.kernel.org
Subject: Re: TRIM support in drivers and dm/md?
Date: Thu, 04 Nov 2010 12:45:33 -0400 [thread overview]
Message-ID: <4CD2E32D.9030303@garzik.org> (raw)
In-Reply-To: <4CD2C755.3000908@att.net>
On 11/04/2010 10:46 AM, Jeff Layton wrote:
> On 11/04/2010 09:40 AM, Matthew Wilcox wrote:
>> On Thu, Nov 04, 2010 at 09:19:43AM -0400, Jeff Layton wrote:
>>> Do many of the SATA controllers support TRIM? (i.e. pass
>>> the TRIM command to the SSD). Does anyone know
>>> anything about dm/md supporting TRIM? (I'm thinking LVM
>>> and software RAID tools).
>> As far as I know, there's nothing to be done in any SATA controller
>> driver to support TRIM. It's just up to the drive whether it understands
>> the command.
> That's the rub. I've heard that many drivers don't understand
> the command. So I'm curious what drivers do and any experience
> anyone might have.
Note the distinction between "drive" and "driver"... I agree with what
Matthew says.
Jeff
next prev parent reply other threads:[~2010-11-04 16:45 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-04 13:19 TRIM support in drivers and dm/md? Jeff Layton
2010-11-04 13:40 ` Matthew Wilcox
2010-11-04 14:46 ` Jeff Layton
2010-11-04 16:45 ` Jeff Garzik [this message]
2010-11-04 17:56 ` Jeff Layton
2010-11-04 20:23 ` Jeff Garzik
2010-11-05 2:44 ` Mark Lord
2010-11-05 2:56 ` Jeff Garzik
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