Re: HEADSUP new usb code coming in.

* Kevin Oberman <oberman_at_es.net> [080819 13:20] wrote:
> > Date: Tue, 19 Aug 2008 12:44:13 -0700
> > From: Alfred Perlstein <alfred_at_freebsd.org>
> > Sender: owner-freebsd-current_at_freebsd.org
> > 
> > After a long period of review and testing I am on the verge of
> > committing Hans Peter's new usb stack to -current.
> > 
> > The patchset requires a SMALL _493_ line diff to the main code,
> > mostly bug fixes to arm.  And then a large number of new files
> > for the usb system.
> > 
> > The new usb system will be committed as separate files with
> > the intention of folding them over the old files before the
> > 9.0 release.
> > 
> > The diff to the main files is here:
> > http://mu.org/~bright/usb2/usb2_release_001.diff
> > 
> > The whole diff, including new files is here:
> > http://mu.org/~bright/usb2/usb4bsd.diff.gz
> > 
> > FAQ:
> > Q. Has this been reviewed?
> > A. Yes, pretty strongly by myself and we've consulted with
> > various others, Warner, Scott and Andrew for review/testing.
> > I wouldn't say that Warner or Scott have given full review
> > but just about all questions have been answered.
> > 
> > Q. Can we change the name from "usb2_" to my favorite name?
> > A. No.   This is for a short period, stop being so annoying.
> > 
> > Q. What about the old usb code?
> > A. What about it? :D
> > 
> > Q. What about ttys?
> > A. I don't know, we'll address the mpsafe aspects of ttys shortly,
> > Hans is very responsive to SMP issues.
> > 
> > Q. Shouldn't you wait?
> > A. Wait for what?  No.
> > 
> > Q. I have some whitespace nits, can you do those?
> > A. No.  It's a 100k line diff and a 3meg delta, we tried really hard
> > to get all whitespace right, but you're welcome to point things out after
> > the commit.
> 
> Cool! I've been waiting for this for a loooooong time. Thanks to you,
> Hans Peter and all of the folks who have helped!

thanks!

> 
> Not on the FAQ:
> 
> Q: Other then no longer requiring giant [MPSAFE], what does usb2 give
>    us?  Does it fix the battery-eating on laptops? Does it allow the
>    system to reach C3 and lower sleep states? (These are at least
>    closely linked issues.)
> 
> I have not been running current for a while and this might be enough
> incentive to get me to kick the tires.

I don't know, I'm not aware as that being a feature, but Hans
is pretty ambitious, he might jump on it.

-Alfred