lkml.org 
[lkml]   [2004]   [Oct]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch] Real-Time Preemption, -RT-2.6.9-rc4-mm1-U8
On Thu, Oct 21 2004, Ingo Molnar wrote:
>
> * Jens Axboe <axboe@suse.de> wrote:
>
> > I didn't look at the USB code, I'm just saying that it's perfectly
> > valid use of a semaphore the pattern you describe (process A holding
> > it, process B releasing it).
>
> yes, that is perfectly true, and sorry if we gave you the wrong
> impression.
>
> the goal of these patches is to do a semaphore->completion conversion in
> cases where the semaphore was used for completion purposes. It's a bit
> faster and more readable but not a 'bugfix' in any way. (another set of
> patches are converting sleep_on() uses to wait_event*() plus waitqueues
> - those can in fact be considered bugfixes in some cases.)
>
> typically the cases where semaphores are held by one task and released
> by another task happens coincide with this used-for-completion scenario.

Thanks for the explanation, I can agree with that.

--
Jens Axboe

-
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: 2005-03-22 14:07    [W:1.025 / U:3.732 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site