[linux-audio-user] rlimit problem on opensuse 10.0: pam_limits: unknown limit item 'rtprio'

[espame]

On Friday 06 January 2006 13:31, Michael Bohle wrote:
> > AFAICT the question really is _why_ the rlimits is not working on
> > opensuse10 kernel-2.6.13-15.7 ? pam-0.80 looks to be rtprio ready ...
>
> Same but different problem here.
>
> As I do write in a posting before, our project jacklab working on a
> opensuse based audio distribution named jad. For this we have to create
> a standard opensuse 10.0 kernel with rt.
>
> As Takashi giving us the advice, to using rtlimits / PAM instead of
> rt-lsm.
> So I asked in this mailinglist
> http://lalists.stanford.edu/lau/2005/12/0258.html
> Who has experiences with PAM?
>
> The answer from Burghard Ritter:
> > If you are using a recent kernel (>=2.6.12) and a recent pam-package
> > (>=0.80) then, if I am right, everything sould already be working.
> > You
> > would adjust the limits.conf to contain something like
> >
> >
> > @audio - rtprio 100
> > @audio - nice -10
> > @audio - memlock 4000000
> >
> >
> > Thus the group audio could run programs with realtime privileges.
>
> Today we finshed a suse flavoured kernel with full realtime preemt.
> 2.6.15 with rt-patch ver rt1 and some other fixes (ipv6, some suse
> patches)
>
> I edited /etc/security/limits.conf as descripted by Burghard but I can't
> get jackd to start.
>
> > jack_create_thread: error -1 switching current thread to rt for
> > inheritance: Unknown error 4294967295
>
> Mooo...
> Now we plan to patch some rt-lsm in our kernel...
>
> Michael
>
> Am Freitag, den 06.01.2006, 10:54 +0000 schrieb Rui Nuno Capela:
> > Joern Nettingsmeier wrote:
> > > hi everyone!
> > >
> > >
> > > after some time of job-induced absence from audio work, i have tried to
> > > bring my audio workstation up to date again.
> > >
> > > the problem is that i can't get realtime privileges.
> > >
> > > arch is x86_64, distro is opensuse 10.0, i'm using the distro kernel,
> > > which is a 2.6.13 with additional patches.
> > >
> > > my /etc/security/limits.conf:
> > >
> > > @realtime       -       memlock         128000
> > > @realtime       -       nice            10
> > > @realtime       -       rtprio          70
> > >
> > > the account i use is member of @realtime.
> > >
> > > on login, i get
> > >
> > > Jan  6 00:01:38 kleineronkel pam_limits[13812]: unknown limit item
> > > 'nice' Jan  6 00:01:38 kleineronkel pam_limits[13812]: unknown limit
> > > item 'rtprio'
> > >
> > > and jack tells me it can't get rt scheduling. memlock works, though.
> > >
> > > i browsed the kernel source, and it looks like the rlimit patch is
> > > there.
> > >
> > > pam is recent:
> > >
> > > pam-0.80-6
> > > pam_ldap-178-3
> > > pam-modules-10.0-11.2
> > >
> > > the bash is not yet rlimits-aware (ulimit does not know about nice and
> > > rtprio), but that should not be a problem, right?
> > >
> > > is there a /proc or /sys file associated with the rlimits patch, so
> > > that i can make sure my running kernel has it? or any other
> > > command-line tools that might help to find the problem?
> > >
> > >
> > > any hints appreciated.
> >
> > Yes, highly appreciated indeed. I'm on opensuse 10.0 too, and after
> > realizing that rlimits are not working OTOB I always find myself patching
> > the original kernel-source with realtime-lsm, over and over again.
> >
> >
> > Anyone else?
> > --
> > rncbc aka Rui Nuno Capela
> > rncbc at rncbc.org

I am having a similar problem using rlimits on an ARCH LINUX system. Some 
people have succsess out of the box on a fresh install, but I cannot get it 
to work.