* PI support for semaphores?
@ 2006-07-13 10:55 Mark Hounschell
2006-07-13 12:23 ` Esben Nielsen
0 siblings, 1 reply; 2+ messages in thread
From: Mark Hounschell @ 2006-07-13 10:55 UTC (permalink / raw)
To: linux-kernel; +Cc: Mark Hounschell
Does PI support for user land semaphores exist?
Thanks
Mark
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: PI support for semaphores?
2006-07-13 10:55 PI support for semaphores? Mark Hounschell
@ 2006-07-13 12:23 ` Esben Nielsen
0 siblings, 0 replies; 2+ messages in thread
From: Esben Nielsen @ 2006-07-13 12:23 UTC (permalink / raw)
To: Mark Hounschell; +Cc: linux-kernel, Mark Hounschell
On Thu, 13 Jul 2006, Mark Hounschell wrote:
> Does PI support for user land semaphores exist?
>
Yes.
But please stop call them "semaphores". PI only makes sense for the kind
of semaphores called "mutexes" (which can be just a basic semaphore).
2.6.18-rc1 and 2.6.17-rt7 (and earlier) have PI futexes.
You still need a patch to glibc. I downloaded it from
http://people.redhat.com/mingo/PI-futex-patches/
I have tested it and it works fine (except for a small problem with
pthread_mutex_timedlock(), which shouldn't be a problem for 95% of the
applications :-)
Esben
> Thanks
> Mark
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2006-07-13 10:55 PI support for semaphores? Mark Hounschell
2006-07-13 12:23 ` Esben Nielsen
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