lkml.org 
[lkml]   [2006]   [Mar]   [31]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateFri, 31 Mar 2006 08:01:56 +0200
FromIngo Molnar <>
SubjectRe: [PATCH] 2.6.16 - futex: small optimization (?)
* Bill Davidsen <davidsen@tmr.com> wrote:

> >>>There are no such situations anymore in an optimal userlevel
> >>>implementation.  The last problem (in pthread_cond_signal) was fixed
> >>>by the addition of FUTEX_WAKE_OP.  The userlevel code you're looking
> >>>at is simply not optimized for the modern kernels.
> >>What are you suggesting here, that the kernel can be inefficient as 
> >>long as the user has a way to program around it?
> >
> >What are you suggesting here, that FUTEX_WAKE_UP is a "user way to 
> >program around" an inefficiency? If yes then please explain to me why 
> >and what you would do differently.
> 
> The point I'm making is that even if an application is "not optimized 
> for modern kernels" or whatever, there's no reason to ignore 
> inefficiencies. [...]

What are you suggesting here, that the implementation of FUTEX_WAKE_UP
is "ignoring inefficiencies"? Please explain why and what you would do
differently to solve that inefficiency.
	Ingo
-
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: 2006-03-31 08:06    [from the cache]
©2003-2008