Messages in this thread | | | Date | Thu, 20 Dec 2007 16:30:58 -0800 (PST) | Subject | Re: [PATCH 0/5] sg_ring for scsi | From | David Miller <> |
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From: Rusty Russell <rusty@rustcorp.com.au> Date: Fri, 21 Dec 2007 10:13:38 +1100
> But, as demonstrated, there are real benefits of having an explicit header: > > 1) It removes the chain-end/explicit count ambiguity (see > http://lkml.org/lkml/2007/10/25/209 & thread) > 2) It allows others to manipulate sg chains, which couldn't be done before > (eg. the ATA code which wants to append a padding element). > 3) I can now hand you an sg ring for you to fill: sg chains can't do that. > > In short, sg_ring is generally useful primitive. sg chains are a clever hack > for scsi_lib to create, and everyone else to read.
I do not refute any of this :-)
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