Re: [LAU] memlock limits not set correctly?

Am 13.01.19 um 17:01 schrieb Bill Gribble:
> This has just popped up on my audio machine and I am not sure
> what is going on.  It's probably a change somewhere in PAM or
> GDM config.  If anyone knows what's up I would appreciate a clue.
>
> Thanks!
> Bill Gribble
>
> # Some audio clients work fine, but Aeolus doesn't
> grib@ghost:~$ aeolus
> Cannot mmap shm segment /jack-1000-0 (Resource temporarily unavailable)
> Map shared memory segments exception
> JackShmReadWritePtr1::~JackShmReadWritePtr1 - Init not done for -1,
> skipping unlock
> JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 0,
> skipping unlock
> Error: can't connect to JACK
>
> # Ok, what's that shared memory segment?
> grib@ghost:~$ ls -l /dev/shm/
> total 80440
> -rw-r--r-- 1 grib grib 82280346 Jan 13 10:49 jack-1000-0
> -rw-r--r-- 1 grib grib     1187 Jan 13 10:49 jack-1000-1
> -rw-rw-rw- 1 grib grib    70744 Jan 13 10:33 jack-shm-registry
> srwxr-xr-x 1 grib grib        0 Jan 13 10:49 jack_default_1000_0
> -rwxr-xr-x 1 grib grib       12 Jan 13 10:49
> jack_sem.1000_default_freewheel
> -rwxr-xr-x 1 grib grib       12 Jan 13 10:49
> jack_sem.1000_default_qjackctl
> -rwxr-xr-x 1 grib grib       12 Jan 13 10:49 jack_sem.1000_default_system
>
> # I would get -EAGAIN if the segment was too big... what's the limit?
> grib@ghost:~$ ulimit -l
> 65536
>
> # What?  Just 64MB? That explains the error,
> # but I thought audio group had unlimited memlock
> grib@ghost:~$ groups
> grib cdrom floppy audio dip video plugdev staff netdev bluetooth
>
> grib@ghost:~$ grep memlock /etc/security/limits.d/audio.conf
> @audio   -  memlock    unlimited
>
> # And in a crazy debugging fit I even set everybody's memlock
> # really high ... so why is this process limited to 64MB?
>
> grib@ghost:~$ grep memlock /etc/security/limits.conf
> #        - memlock - max locked-in-memory address space (KB)
> * - memlock 512000
>

when I do a grep memlock /etc/security/limits.conf I get

#        - memlock - max locked-in-memory address space (KB)

at least, there is not a single active entry in my limits.conf at all.
Maybe just remove it, no Idea were it could come from.
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Received on Mon Jan 14 08:15:02 2019