Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3

Evgeniy Polyakov
2007-03-01T08:23:44Z

On Wed, Feb 28, 2007 at 04:14:14PM +0000, Pavel Machek (pavel@ucw.cz) wrote:
> Hi!
>
> > > I think what you are not hearing, and what everyone else is saying
> > > (INCLUDING Linus), is that for most programmers, state machines are
> > > much, much harder to program, understand, and debug compared to
> > > multi-threaded code. You may disagree (were you a MacOS 9 programmer
> > > in another life?), and it may not even be true for you if you happen
> > > to be one of those folks more at home with Scheme continuations, for
> > > example. But it is true that for most kernel programmers, threaded
> > > programming is much easier to understand, and we need to engineer the
> > > kernel for what will be maintainable for the majority of the kernel
> > > development community.
> >
> > I understand that - and I totally agree.
> > But when more complex, more bug-prone code results in higher performance
> > - that must be used. We have linked lists and binary trees - the latter
>
> No-o. Kernel is not designed like that.
>
> Often, more complex and slightly faster code exists, and we simply use
> slower variant, because it is fast enough.
>
> 10% gain in speed is NOT worth major complexity increase.

Should I create a patch to remove rb-tree implementation?
That practice is stupid IMO.

> Pavel
> --
> (english) http://www.livejournal.com/~pavelmachek
> (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

--
Evgeniy Polyakov