From: Christoph Hellwig <hch@lst.de>
To: "Moore, Eric Dean" <Emoore@lsil.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Matthew Wilcox <matthew@wil.cx>, Christoph Hellwig <hch@lst.de>,
linux-scsi@vger.kernel.org
Subject: Re: [PATCH] fusion: streamline ->queuecommand
Date: Wed, 6 Oct 2004 17:41:36 +0200 [thread overview]
Message-ID: <20041006154136.GA28333@lst.de> (raw)
In-Reply-To: <0E3FA95632D6D047BA649F95DAB60E5705262196@exa-atlanta>
On Mon, Oct 04, 2004 at 05:33:41PM -0400, Moore, Eric Dean wrote:
> (3) How will a generic negotiation be done for raid volumes? The MPT driver
> supports RAID levels
> 0, 1, and 0+1. The driver does DV via RAID passthru to the individual
> devices.
I've taken a quick look at fusion in that respect. I think the cleanest
thing would be to add "virtual" scsi_device structures for raid physical
disks, and set the BLIST_NO_ULD_ATTACH flag so we don't get the disk
driver to attach to it. This would have the added benefit of beeing
able to use the SG_IO passthrough interface even for physical disk in
a raid volume. To make this work we'd obviously have to add some code
to ->queuecommand to handle this special case.
I think all the other questions have been answered already.
next prev parent reply other threads:[~2004-10-06 15:42 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-04 21:33 [PATCH] fusion: streamline ->queuecommand Moore, Eric Dean
2004-10-04 21:57 ` James Bottomley
2004-10-06 15:41 ` Christoph Hellwig [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-10-21 14:58 Moore, Eric Dean
2004-10-06 14:46 Gibbons, Terry
2004-10-06 14:58 ` Matthew Wilcox
2004-10-06 14:23 Gibbons, Terry
2004-10-06 14:30 ` Christoph Hellwig
2004-10-06 15:47 ` James Bottomley
2004-10-06 14:00 Gibbons, Terry
2004-10-06 14:13 ` Arjan van de Ven
2004-10-06 14:25 ` Matthew Wilcox
2004-10-05 22:38 Moore, Eric Dean
2004-10-05 23:11 ` James Bottomley
2004-10-05 23:37 ` Patrick Mansfield
2004-10-06 0:48 ` James Bottomley
2004-10-02 8:13 Christoph Hellwig
2004-10-02 13:39 ` Matthew Wilcox
2004-10-02 14:49 ` Christoph Hellwig
2004-10-21 9:21 ` Christoph Hellwig
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