From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <499AFFC6.1030207@domain.hid> Date: Tue, 17 Feb 2009 19:19:50 +0100 From: Jan Kiszka MIME-Version: 1.0 References: <20090217170418.1425.56126.stgit@domain.hid> <20090217170419.1425.15313.stgit@domain.hid> <499AF09F.8040402@domain.hid> <499AF3C9.2040502@domain.hid> <499AF5DC.6010602@domain.hid> <499AF82A.20406@domain.hid> <499AF8E7.5000304@domain.hid> <499AFA8D.3080302@domain.hid> <499AFF38.5030509@domain.hid> In-Reply-To: <499AFF38.5030509@domain.hid> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai-core] [PATCH v2 1/4] POSIX: Fix SCHED_RR thread creation List-Id: "Xenomai life and development \(bug reports, patches, discussions\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gilles Chanteperdrix Cc: xenomai@xenomai.org Gilles Chanteperdrix wrote: > Jan Kiszka wrote: >> Gilles Chanteperdrix wrote: >>> Jan Kiszka wrote: >>>> Gilles Chanteperdrix wrote: >>>>> Jan Kiszka wrote: >>>>>> Gilles Chanteperdrix wrote: >>>>>>> Jan Kiszka wrote: >>>>>>>> @@ -192,6 +192,9 @@ static void *__pthread_trampoline(void *arg) >>>>>>>> >>>>>>>> param.sched_priority = iargs->prio; >>>>>>>> policy = iargs->policy; >>>>>>>> + if (policy == SCHED_RR) >>>>>>>> + /* Restrict round-robin scheduling to the Xenomai domain. */ >>>>>>>> + policy = SCHED_FIFO; >>>>>>> Should not there be the same thing in __wrap_pthread_setschedparam ? >>>>>> Yes, and setschedparam_ex, here we go: >>>>> Actually, I am wondering if we can not get rid of these calls to >>>>> __real_pthread_setschedparam, now that propagating kernel-space priority >>>>> to user-space is done by a signal ? >>>> Not with the existing code, as that only forwards prio changes, but no >>>> policy changes. >>> If we map SCHED_RR to SCHED_FIFO, are there any policy changes? >> Yes, the initial one. Keep in mind that not all pthread implementations >> may respect the pthread_attr or have problems assigning SCHED_FIFO to >> threads of non-root users. > > Ok. What about calling xnshadow_renice in xnshadow_map ? Sorry, I can't follow. xnshadow_renice does not help user space to find the right policy, or what do you mean? Jan -- Siemens AG, Corporate Technology, CT SE 2 Corporate Competence Center Embedded Linux