linux-kernel - Re: Please revert 5adc55da4a7758021bcc374904b0f8b076508a11 (PCI_MULTITHREAD

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Message-ID: <20070511092220.7d449001@gondolin.boeblingen.de.ibm.com>
Date:	Fri, 11 May 2007 09:22:20 +0200
From:	Cornelia Huck <cornelia.huck@...ibm.com>
To:	Stefan Richter <stefanr@...6.in-berlin.de>
Cc:	Phillip Susi <psusi@....rr.com>, david@...g.hm,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Adrian Bunk <bunk@...sta.de>, Greg K-H <greg@...ah.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Please revert 5adc55da4a7758021bcc374904b0f8b076508a11
 (PCI_MULTITHREAD_PROBE)

On Thu, 10 May 2007 16:55:54 +0200,
Stefan Richter <stefanr@...6.in-berlin.de> wrote:

> Phillip Susi wrote:
> > Stefan Richter wrote:
> >> The SCSI stack already has infrastructure for multi-threaded discovery
> >> and probing.
> > 
> > So?  It would still benefit from using a generic framework that other 
> > buses can use as well.
> 
> Perhaps, perhaps not.  Many details of the If and How of asynchronous,
> parallelized probing rest with the low-level drivers.

A mix of bus/driver parallelism would probably be the most flexible
approach.

> [BTW, which ever team attempts to design this generic framework please
> brings in detailed knowledge of a variety of bus architectures.  I for
> one would like to contribute with what I know about IEEE 1394, but
> before that I still have to experiment on my own before I have a good
> understanding of how to parallelize IEEE 1394 scanning and probing, and
> the IEEE 1394 core is being radically reworked at the moment anyway.]

I guess I'm too tainted by s390 :/ (which in comparison provides a
quite unified way at probing), but I'd be happy to contibute my
experiences as well.
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