lkml.org 
[lkml]   [2007]   [Feb]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch 05/11] syslets: core code
On Wed, 14 Feb 2007, Linus Torvalds wrote:

>
>
> On Tue, 13 Feb 2007, Ingo Molnar wrote:
> >
> > the core syslet / async system calls infrastructure code.
>
> Ok, having now looked at it more, I can say:
>
> - I hate it.
>
> I dislike it intensely, because it's so _close_ to being usable. But the
> programming interface looks absolutely horrid for any "casual" use, and
> while the loops etc look like fun, I think they are likely to be less than
> useful in practice. Yeah, you can do the "setup and teardown" just once,
> but it ends up being "once per user", and it ends up being a lot of stuff
> to do for somebody who wants to just do some simple async stuff.
>
> And the whole "lock things down in memory" approach is bad. It's doing
> expensive things like mlock(), making the overhead for _single_ system
> calls much more expensive. Since I don't actually believe that the
> non-single case is even all that interesting, I really don't like it.
>
> I think it's clever and potentially useful to allow user mode to see the
> data structures (and even allow user mode to *modify* them) while the
> async thing is running, but it really seems to be a case of excessive
> cleverness.

Ok, that makes the wierdo-count up to two :) I agree with you that the
chained API can be improved at least.



- Davide


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-02-14 22:13    [W:0.179 / U:7.096 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site