[pulseaudio-discuss] Rtkit and PulseAudio rlimit_rttime mismatch

Felipe Sateler fsateler at debian.org
Tue Jul 1 06:35:18 PDT 2014


On Mon, Jun 30, 2014 at 1:29 PM, Lennart Poettering
<lennart at poettering.net> wrote:
> On Mon, 30.06.14 11:16, Felipe Sateler (fsateler at debian.org) wrote:
>> On Fri, Jun 27, 2014 at 4:37 AM, David Henningsson
>> <david.henningsson at canonical.com> wrote:
>> > Hi,
>> >
>> > Ricardo just noticed that a bug fixed in rtkit 0.11 causes a mismatch
>> > between PulseAudio and RtKit.
>> >
>> > In short, PulseAudio sets its default RLIMIT_RTTIME to one second, and rtkit
>> > by default refuses to give realtime priority to anything above 200 ms.
>> >
>> > So, should we change rtkit to allow an RLIMIT_RTTIME of one second, or
>> > modify PulseAudio to have itself killed after 200 ms of rtprio? Opinions?
>> Also, how does rtkit interoperate with the newer systemd without
>> ControlGroup stanzas?
> Heya, sorry for not responding to this thread earlier, somehow missed it
> entirely.
> The thing with rtkit is a bit messy right now. The rt cgroup hookup in
> the kernel is a fucked up so far, and it is not clear how or when it
> will be fixed. Because of this uncertain situation we are not exposing
> any rt cgroup props in systemd but until that happens rtkit is a bit in
> an unhappy spot, since without rt privs it cannot do its job.

To be clear, does that mean that since systemd 205 rtkit is expected
to not work, and no workaround is available?


Felipe Sateler

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