From: Jeff Garzik <jeff@garzik.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
Linux IDE mailing list <linux-ide@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Jens Axboe <jens.axboe@oracle.com>,
Arjan van de Ven <arjan@infradead.org>
Subject: Re: Implementing NVMHCI...
Date: Sat, 11 Apr 2009 16:21:26 -0400 [thread overview]
Message-ID: <49E0FBC6.3050600@garzik.org> (raw)
In-Reply-To: <alpine.LFD.2.00.0904111250370.4583@localhost.localdomain>
Linus Torvalds wrote:
>
> On Sat, 11 Apr 2009, Alan Cox wrote:
>>> The spec describes the sector size as
>>> "512, 1k, 2k, 4k, 8k, etc." It will be interesting to reach
>>> "etc" territory.
>> Over 4K will be fun.
>
> And by "fun", you mean "irrelevant".
>
> If anybody does that, they'll simply not work. And it's not worth it even
> trying to handle it.
FSVO trying to handle...
At the driver level, it would be easy to clamp sector size to 4k, and
point the scatterlist to a zero-filled region for the >4k portion of
each sector. Inefficient, sure, but it is low-cost to the driver and
gives the user something other than a brick.
if (too_large_sector_size)
nvmhci_fill_sg_clamped_interleave()
else
nvmhci_fill_sg()
Regards,
Jeff
next prev parent reply other threads:[~2009-04-11 20:22 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-11 17:33 Implementing NVMHCI Jeff Garzik
2009-04-11 19:32 ` Alan Cox
2009-04-11 19:52 ` Linus Torvalds
2009-04-11 20:21 ` Jeff Garzik [this message]
2009-04-11 21:49 ` Grant Grundler
2009-04-11 22:33 ` Linus Torvalds
2009-04-12 5:08 ` Leslie Rhorer
2009-04-11 23:25 ` Alan Cox
2009-04-11 23:51 ` Jeff Garzik
2009-04-12 0:49 ` Linus Torvalds
2009-04-12 1:59 ` Jeff Garzik
2009-04-12 1:15 ` david
2009-04-12 3:13 ` Linus Torvalds
2009-04-12 14:23 ` Mark Lord
2009-04-12 17:29 ` Jeff Garzik
2009-04-11 19:54 ` Jeff Garzik
2009-04-11 21:08 ` John Stoffel
2009-04-11 21:31 ` John Stoffel
[not found] <20090412091228.GA29937@elte.hu>
2009-04-12 15:14 ` Szabolcs Szakacsits
2009-04-12 15:20 ` Alan Cox
2009-04-12 16:15 ` Avi Kivity
2009-04-12 17:11 ` Linus Torvalds
2009-04-13 6:32 ` Avi Kivity
2009-04-13 15:10 ` Linus Torvalds
2009-04-13 15:38 ` James Bottomley
2009-04-14 7:22 ` Andi Kleen
2009-04-14 10:07 ` Avi Kivity
2009-04-14 9:59 ` Avi Kivity
2009-04-14 10:23 ` Jeff Garzik
2009-04-14 10:37 ` Avi Kivity
2009-04-14 11:45 ` Jeff Garzik
2009-04-14 11:58 ` Szabolcs Szakacsits
2009-04-17 22:45 ` H. Peter Anvin
2009-04-14 12:08 ` Avi Kivity
2009-04-14 12:21 ` Jeff Garzik
2009-04-25 8:26 ` Pavel Machek
2009-04-12 15:41 ` Linus Torvalds
2009-04-12 17:02 ` Robert Hancock
2009-04-12 17:20 ` Linus Torvalds
2009-04-12 18:35 ` Robert Hancock
2009-04-13 11:18 ` Avi Kivity
2009-04-12 17:23 ` James Bottomley
[not found] ` <6934efce0904141052j3d4f87cey9fc4b802303aa73b@mail.gmail.com>
2009-04-15 6:37 ` Artem Bityutskiy
2009-04-30 22:51 ` Jörn Engel
2009-04-30 23:36 ` Jeff Garzik
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