From: Christoph Hellwig <hch@infradead.org>
To: Michael Monnerie <michael.monnerie@is.it-management.at>
Cc: Christoph Hellwig <hch@infradead.org>,
Lukas Czerner <lczerner@redhat.com>,
xfs@oss.sgi.com
Subject: Re: xfs: add FITRIM support
Date: Thu, 6 Jan 2011 13:10:15 -0500 [thread overview]
Message-ID: <20110106181014.GD32670@infradead.org> (raw)
In-Reply-To: <201101061750.43556@zmi.at>
On Thu, Jan 06, 2011 at 05:50:42PM +0100, Michael Monnerie wrote:
> On Donnerstag, 6. Januar 2011 Dave Chinner wrote:
> > Realistically, we have
> > to design for how we expect devices to behave in 2-3 years time, not
> > waste time trying to optimise for fundamentally broken devices that
> > nobody will be using in 2-3 years time...
>
> I see, thanks for the explanation. I hope that there will be a solution
> that allows us to FITRIM on Saturday "in the background", so the thin
> provisioned VMs are smaller and faster to back up. That's my immediate
> wish, as we currently don't use SSDs.
That's what you can do with my FITRIM patches. Right now the only
discard support known to me is my impementation that requires XFS as
backing store for the images. And a hole punch of an existing hole
is very cheap in XFS, so trimming things multiple times is not an issue.
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next prev parent reply other threads:[~2011-01-06 18:08 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-25 11:23 xfs: add FITRIM support Christoph Hellwig
2010-12-22 21:41 ` Alex Elder
2010-12-28 16:09 ` Christoph Hellwig
2011-01-03 10:49 ` Lukas Czerner
2010-12-23 1:44 ` Dave Chinner
2010-12-30 11:41 ` Christoph Hellwig
2011-01-03 10:57 ` Lukas Czerner
2011-01-03 23:25 ` Dave Chinner
2011-01-05 10:21 ` Lukas Czerner
2011-01-05 22:07 ` Michael Monnerie
2011-01-05 22:50 ` Dave Chinner
2011-01-06 8:10 ` Michael Monnerie
2011-01-06 8:33 ` Lukas Czerner
2011-01-06 8:40 ` Lukas Czerner
2011-01-06 9:17 ` Dave Chinner
2011-01-06 16:50 ` Michael Monnerie
2011-01-06 18:10 ` Christoph Hellwig [this message]
2011-01-06 18:08 ` Christoph Hellwig
2011-01-06 18:06 ` Christoph Hellwig
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