From: Christoph Hellwig <hch@lst.de>
To: Luben Tuikov <luben_tuikov@adaptec.com>
Cc: Jeff Garzik <jgarzik@pobox.com>,
andrew.patterson@hp.com, Christoph Hellwig <hch@lst.de>,
"Moore, Eric Dean" <Eric.Moore@lsil.com>,
jejb@steeleye.com, linux-scsi@vger.kernel.org,
Linux Kernel <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@osdl.org>
Subject: Re: ioctls, etc. (was Re: [PATCH 1/4] sas: add flag for locally attached PHYs)
Date: Fri, 21 Oct 2005 20:04:55 +0200 [thread overview]
Message-ID: <20051021180455.GA6834@lst.de> (raw)
In-Reply-To: <435929FD.4070304@adaptec.com>
On Fri, Oct 21, 2005 at 01:48:45PM -0400, Luben Tuikov wrote:
> > why James has suggested implementing SMP as a block driver. People get
> > stuck into thinking "block driver == block device", which is wrong. The
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> > Linux block layer is nothing but a message queueing interface.
>
> Now, just because James suggested implementing the SMP service as a block
> device you think this is the right thing to do?
>
> How about this: Why not as a char device?
you can implement a char device using the block layer. See
drivers/scsi/{ch.c,osst.c,sg.c,st.c} for examples.
That beeing said I tried this approach. It looks pretty cool when you
think about it, but the block layer is quite a bit too heavyweight for
queueing up a few SMP requests, and we need to carry too much useless
code around for it.
next prev parent reply other threads:[~2005-10-21 18:06 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-20 15:25 [PATCH 1/4] sas: add flag for locally attached PHYs Moore, Eric Dean
2005-10-20 15:55 ` Luben Tuikov
2005-10-20 16:01 ` Christoph Hellwig
2005-10-20 16:51 ` Luben Tuikov
2005-10-20 17:03 ` Christoph Hellwig
2005-10-20 17:22 ` Arjan van de Ven
2005-10-20 20:10 ` Luben Tuikov
2005-10-21 8:16 ` Arjan van de Ven
2005-10-20 20:02 ` Luben Tuikov
2005-10-21 0:01 ` Andrew Patterson
2005-10-21 0:46 ` ioctls, etc. (was Re: [PATCH 1/4] sas: add flag for locally attached PHYs) Jeff Garzik
2005-10-21 5:09 ` Mike Christie
2005-10-21 5:41 ` Douglas Gilbert
2005-10-21 6:19 ` Jeff Garzik
2005-10-21 18:37 ` Luben Tuikov
2005-10-21 17:48 ` Luben Tuikov
2005-10-21 18:04 ` Christoph Hellwig [this message]
2005-10-21 18:12 ` Luben Tuikov
2005-10-21 18:20 ` Matthew Wilcox
2005-10-22 2:30 ` Douglas Gilbert
2005-10-22 2:54 ` Jeff Garzik
2005-10-22 3:53 ` Jeff Garzik
2005-10-22 17:14 ` Luben Tuikov
2005-10-22 17:49 ` Francois Romieu
2005-10-22 16:51 ` Luben Tuikov
2005-10-21 18:18 ` Jeff Garzik
2005-10-21 18:50 ` Luben Tuikov
2005-10-21 18:54 ` Jeff Garzik
2005-10-21 19:13 ` Luben Tuikov
2005-10-21 19:23 ` Jeff Garzik
2005-10-21 22:20 ` Stefan Richter
2005-10-21 19:22 ` Luben Tuikov
2005-10-21 19:39 ` Jeff Garzik
2005-10-21 20:41 ` Luben Tuikov
2005-10-21 21:12 ` Jeff Garzik
2005-10-21 21:24 ` Luben Tuikov
2005-10-21 21:41 ` Jeff Garzik
2005-10-21 22:14 ` Luben Tuikov
2005-10-21 22:43 ` Jeff Garzik
2005-10-22 9:26 ` Stefan Richter
2005-10-22 17:23 ` Luben Tuikov
2005-10-22 10:42 ` Stefan Richter
2005-10-22 10:58 ` Christoph Hellwig
2005-10-22 15:28 ` Sergey Panov
2005-10-22 17:19 ` Christoph Hellwig
2005-10-22 17:38 ` Sergey Panov
2005-10-24 15:18 ` Luben Tuikov
2005-10-22 18:27 ` Alan Cox
2005-10-24 13:51 ` Luben Tuikov
2005-10-24 15:41 ` Alan Cox
2005-10-24 15:14 ` Luben Tuikov
2005-10-24 15:59 ` Regala
2005-10-24 16:03 ` Regala
2005-10-24 16:13 ` Luben Tuikov
2005-10-24 16:04 ` Regala
2005-10-22 17:30 ` Luben Tuikov
2005-10-22 18:19 ` Jeff Garzik
2005-10-22 17:49 ` Stefan Richter
2005-10-24 22:09 ` ioctls, etc. (was Re: [PATCH 1/4] sas: add flag for locally attachedPHYs) David Lang
2005-10-24 23:09 ` Stefan Richter
2005-10-22 11:12 ` David Lang
2005-10-22 17:39 ` Luben Tuikov
2005-10-22 17:41 ` Stefan Richter
2005-10-22 17:51 ` Christoph Hellwig
2005-10-22 18:21 ` Stefan Richter
2005-10-22 18:39 ` Sergey Panov
2005-10-22 13:27 ` ioctls, etc. (was Re: [PATCH 1/4] sas: add flag for locally attached PHYs) Stefan Richter
2005-10-22 16:09 ` Luben Tuikov
2005-10-21 19:41 ` Matthew Wilcox
2005-10-21 19:48 ` Luben Tuikov
2005-10-21 19:54 ` Matthew Wilcox
2005-10-21 20:05 ` Luben Tuikov
2005-10-21 19:46 ` Arjan van de Ven
2005-10-21 19:50 ` Luben Tuikov
2005-10-21 9:06 ` [PATCH 1/4] sas: add flag for locally attached PHYs Arjan van de Ven
2005-10-21 17:05 ` Andrew Patterson
2005-10-21 17:18 ` Arjan van de Ven
2005-10-21 18:57 ` Luben Tuikov
2005-10-21 17:32 ` Luben Tuikov
2005-10-21 1:50 ` Douglas Gilbert
2005-10-21 2:16 ` Jeff Garzik
2005-10-21 3:25 ` Douglas Gilbert
2005-10-21 18:04 ` Luben Tuikov
-- strict thread matches above, loose matches on Subject: below --
2005-10-21 20:31 ioctls, etc. (was Re: [PATCH 1/4] sas: add flag for locally attached PHYs) Salyzyn, Mark
2005-10-21 20:31 ` Salyzyn, Mark
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