From: Matthew Wilcox <matthew@wil.cx>
To: Greg Freemyer <greg.freemyer@gmail.com>
Cc: Theodore Tso <tytso@mit.edu>, J?rn Engel <joern@logfs.org>,
Matthew Wilcox <willy@linux.intel.com>,
Jens Axboe <jens.axboe@oracle.com>,
Ric Wheeler <rwheeler@redhat.com>,
linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,
Linux RAID <linux-raid@vger.kernel.org>
Subject: Re: Is TRIM/DISCARD going to be a performance problem?
Date: Mon, 11 May 2009 07:39:48 -0600 [thread overview]
Message-ID: <20090511133947.GE8112@parisc-linux.org> (raw)
In-Reply-To: <87f94c370905110610j2f5ea7fcua4e596b2b5e82a5f@mail.gmail.com>
On Mon, May 11, 2009 at 09:10:15AM -0400, Greg Freemyer wrote:
> That implies that the SSD folks are not treating erase blocks as a
> contiguous group of sectors. For some reason, I thought their was
> only one mapping per erase block and within the erase block the
> sectors were contiguous..
I believe there is a mapping per LBA, not per erase block. Of course,
different technologies will have different limitations here, but it
would be foolish to assume anything about SSDs at this point.
(For those who haven't heard my disclaimer before, the Intel SSD team
don't tell me anything fun about how the drives work internally).
--
Matthew Wilcox Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."
next prev parent reply other threads:[~2009-05-11 13:39 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-09 21:14 Is TRIM/DISCARD going to be a performance problem? Theodore Ts'o
2009-05-10 16:53 ` Jörn Engel
2009-05-11 8:37 ` Theodore Tso
2009-05-11 10:06 ` Jörn Engel
2009-05-11 10:18 ` Jens Axboe
2009-05-11 15:43 ` Jeff Garzik
2009-05-11 11:27 ` Theodore Tso
2009-05-11 12:09 ` Theodore Tso
2009-05-11 13:10 ` Greg Freemyer
2009-05-11 13:39 ` Matthew Wilcox [this message]
2009-05-11 14:27 ` Theodore Tso
2009-05-11 14:29 ` Ric Wheeler
2009-05-11 14:50 ` Theodore Tso
2009-05-11 14:58 ` Ric Wheeler
2009-05-11 15:00 ` Matthew Wilcox
2009-05-11 18:47 ` Greg Freemyer
2009-05-11 19:22 ` Andreas Dilger
2009-05-11 23:38 ` Neil Brown
2009-05-12 13:28 ` Greg Freemyer
2009-05-11 13:15 ` Ric Wheeler
2010-04-24 17:11 ` Phillip Susi
2009-05-11 12:43 ` Jörn Engel
2009-05-11 12:48 ` Matthew Wilcox
[not found] ` <f3177b9e0905111433i40e41c90r920d7ccf36442ffd@mail.gmail.com>
2009-05-11 22:03 ` Chris Worley
2009-05-11 16:30 ` Chris Worley
2009-05-11 8:12 ` Jens Axboe
2009-05-11 8:41 ` Theodore Tso
2009-05-11 8:49 ` Jens Axboe
2009-05-11 17:18 ` Chris Mason
2009-05-11 18:43 ` Matthew Wilcox
2009-05-11 18:53 ` Chris Mason
2009-05-11 19:19 ` Theodore Tso
2009-05-29 10:52 ` Florian Weimer
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