Re: IDE?
[Posted August 20, 2002 by corbet]
| From: |
| Alan Cox <alan@lxorguk.ukuu.org.uk> |
| To: |
| Larry McVoy <lm@bitmover.com> |
| Subject: |
| Re: IDE? |
| Date: |
| 17 Aug 2002 21:04:15 +0100 |
| Cc: |
| Linus Torvalds <torvalds@transmeta.com>,
Marc-Christian Petersen <m.c.p@wolk-project.de>,
linux-kernel@vger.kernel.org |
On Sat, 2002-08-17 at 01:09, Larry McVoy wrote:
> > I actually don't think it's the people as much as it is the ridiculous
> > linkages inside ide.c and the hugely complicated rules. The code is messy.
>
> So of all the people you know floating around in "active hacker" state, who
> seems like the sort of person who could handle this mess? If there is no
> person, is there a description which is more specific than "wanted: person
> who wants thankless abusive non-payed job to clean up what is inherently a
> mess"?
IMHO you need
- An understanding of ATA (which is the protocol
equivalent of object oriented cobol)
- The ability to work with vendors (it needs to be someone
at a company because many vendors won't NDA with
individuals even if they are happy with GPL code off
their data sheet)
- Someone who has taste in code and understands how to
beat code into shape without breaking it
- The ability to deduce the other errata the vendor forgot
to tell you about or doesn't want to admit exists for
fear of US lawsuits (I kid you not)
- A good understanding of the block layer and its locking
especially because IDE has a heirarchy of contention
problems:
two drives one bus
two channels one DMA engine
two controllers one I/O at a time
ISA IRQ sharing locks
-
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