From: Eric Sandeen <sandeen@sandeen.net>
To: Dave Chinner <david@fromorbit.com>
Cc: Peter Niemayer <niemayer@isg.de>, xfs@oss.sgi.com
Subject: Re: XFS support for TRIM / blkdev_issue_discard?
Date: Sun, 19 Apr 2009 10:51:24 -0500 [thread overview]
Message-ID: <49EB487C.1020205@sandeen.net> (raw)
In-Reply-To: <20090419081927.GE16929@discord.disaster>
Dave Chinner wrote:
> On Tue, Apr 14, 2009 at 01:32:35PM -0500, Felix Blyakher wrote:
>> On Apr 14, 2009, at 9:44 AM, Peter Niemayer wrote:
>>
>>> Dear Felix Blyakher,
>> Hi Peter,
>>
>>> do you know whether there are plans to support the ATA TRIM command /
>>> blkdev_issue_discard() call in XFS for Linux anytime soon?
>> This topic was indeed brought up in xfs discussions.
>> Though, we don't have any definite plans on supporting it yet.
>
> I did some initial work on tracking extents being freed, but then
> the TRIM request morphed into a "tell the largest free space around
> the area just freed" and that is much harder to do than simply to
> issue a "we just freed this bit" command.
FWIW, ext[34] is still doing it block by block. At least for SSDs, I
think that's fine, isn't it? For think provisioning it might be
different. I think (?) the simply block-by-block free is still
relevant, no?
-Eric
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next prev parent reply other threads:[~2009-04-19 15:51 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-31 5:30 [GIT PULL] XFS update for 2.6.30 Felix Blyakher
2009-04-02 16:26 ` Felix Blyakher
2009-04-03 16:52 ` Linus Torvalds
2009-04-03 17:02 ` Linus Torvalds
2009-04-03 17:41 ` Felix Blyakher
2009-04-04 1:19 ` david
2009-04-04 1:54 ` Felix Blyakher
2009-04-14 14:44 ` XFS support for TRIM / blkdev_issue_discard? Peter Niemayer
2009-04-14 18:32 ` Felix Blyakher
2009-04-15 9:43 ` Peter Niemayer
2009-04-15 11:58 ` Peter Niemayer
2009-04-17 16:09 ` Peter Niemayer
2009-04-17 16:50 ` Eric Sandeen
2009-04-19 8:19 ` Dave Chinner
2009-04-19 15:51 ` Eric Sandeen [this message]
2009-04-20 18:45 ` Peter Niemayer
2009-04-20 19:11 ` Martin K. Petersen
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