From: Matthew Wilcox <willy@debian.org>
To: Jeff Garzik <jgarzik@pobox.com>
Cc: Adam Radford <aradford@amcc.com>,
akpm@osdl.org, james.bottomley@steeleye.com, hch@lst.de,
linux-scsi@vger.kernel.org
Subject: Re: [PATCH/RFC 1/2] 3ware 9000 SATA-RAID driver v2.26.00.009
Date: Fri, 28 May 2004 05:32:44 +0100 [thread overview]
Message-ID: <20040528043244.GK5850@parcelfarce.linux.theplanet.co.uk> (raw)
In-Reply-To: <40B6235B.1080507@pobox.com>
On Thu, May 27, 2004 at 01:20:27PM -0400, Jeff Garzik wrote:
> Adam Radford wrote:
> >- The card can take up to 256 io's at a time, but 2 are marked off
> > for internal use. There are no 'per device' limits. The firmware queue
> > depth is 256 total for all devices.
>
> I would therefore recommend not setting device queue depth in
> ->slave_configure(), but rather setting the Scsi_Host_Template's
> ->can_queue to 256.
>
> This more accurately reflects the hardware.
254, surely? The midlayer can't be expected to know about the 2 reserved
ones ;-)
--
"Next the statesmen will invent cheap lies, putting the blame upon
the nation that is attacked, and every man will be glad of those
conscience-soothing falsities, and will diligently study them, and refuse
to examine any refutations of them; and thus he will by and by convince
himself that the war is just, and will thank God for the better sleep
he enjoys after this process of grotesque self-deception." -- Mark Twain
next prev parent reply other threads:[~2004-05-28 4:32 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-26 21:59 [PATCH/RFC 1/2] 3ware 9000 SATA-RAID driver v2.26.00.009 Adam Radford
2004-05-27 17:20 ` Jeff Garzik
2004-05-28 4:32 ` Matthew Wilcox [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-05-26 20:46 Adam Radford
2004-05-26 21:42 ` Jeff Garzik
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