Re: [RFC PATCH]: Rewritten ESP driver, porters needed!

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From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Fri, 27 Apr 2007 16:16:58 +0100

> aic7xxx might not be the best driver to look at either :)  In practice
> a softirq has short enough latency so this doesn't matter, but you
> should probably benchmark it on your hardware.  53x700.c which is
> the most modern scsi driver and is in about the same hardware class
> as the esp gets away without using internal queues, but it also
> has a nice internal buffer where commands can just be put into slots
> for later execution.

This driver runs on machines with 10MHz cpus (sun4c), the delay to the
softirq surely matters for those guys :-)

> Btw, using the block layer tcq code and the scsi wrappers for it
> would be nice aswell.

Hmm, I though I was doing so by using the interfaces found in
include/scsi/scsi_tcq.h which I am doing.

Oh, you're suggesting to use scsi_find_tag() for reconnect handling?

Do I have to do anything special for that to work or can I just
add calls to it right now?
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