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From: Mark Lord <liml@rtr.ca>
To: Jens Axboe <axboe@suse.de>, Jeff Garzik <jgarzik@pobox.com>,
	IDE/ATA development list <linux-ide@vger.kernel.org>
Subject: libata+SGIO:  is .dma_boundary respected?
Date: Sun, 19 Mar 2006 15:48:23 -0500	[thread overview]
Message-ID: <441DC397.9040504@rtr.ca> (raw)

Jens / Jeff,

Each libata driver registers a .dma_boundary field with SCSI.
This field is used to prevent merging of bio segments across
a hardware limitation boundary, usually 0xffff.

This looks like it works for regular block I/O,
but I'm not so sure about SGIO originated requests.

Any thoughts, or code you can point me to?

Thanks

Mark

             reply	other threads:[~2006-03-19 20:48 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-03-19 20:48 Mark Lord [this message]
2006-03-19 21:14 ` libata+SGIO: is .dma_boundary respected? Jeff Garzik
2006-03-19 21:19   ` Mark Lord
2006-03-19 21:38     ` Jeff Garzik
2006-03-19 21:45       ` Mark Lord
2006-03-19 21:54         ` Mark Lord
2006-03-21  1:18           ` Jeff Garzik
2006-03-21  4:43             ` Mark Lord
2006-03-21  6:14               ` Jeff Garzik
2006-03-21 13:59                 ` Mark Lord
2006-03-21 18:42                   ` Jens Axboe
2006-03-21 19:18                     ` Mark Lord
2006-03-21 19:29                       ` Jeff Garzik
2006-03-21 19:31                         ` Mark Lord
2006-03-21 19:33                           ` Mark Lord
2006-03-21 19:35                             ` Jens Axboe
2006-03-21 19:38                               ` Jeff Garzik
2006-03-21 19:42                                 ` Jens Axboe
2006-03-21 19:43                                 ` James Bottomley
2006-03-21 19:46                                   ` Jens Axboe
2006-03-21 20:44                                     ` James Bottomley
2006-03-21 21:54                                       ` Benjamin Herrenschmidt
2006-03-21 19:31                       ` Jens Axboe
2006-03-21 19:36                         ` Mark Lord
2006-03-21 19:43                           ` Jeff Garzik
2006-03-21 20:51                             ` Mark Lord
2006-03-22 11:25                       ` Tejun Heo
2006-03-22 14:52                         ` Mark Lord
2006-03-21  1:15         ` Jeff Garzik

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