JuceVSTWrapper calling malloc

Hi everyone,
I’m trying to do a very simple thing: expose a floating point parameter in a vst plugin.
It seems to me that the first time the parameter is set from outside the plugin, the VST Wrapper allocates memory (Juce 5.4.5, will update probably after Christmas).
Is it ok? Is there a way to “prime” the system so that it preallocates that memory and leaves it there without affecting the real time execution?

I found out about this because I compile my vst for Elk and it allows me to debug mode switches of the rt kernel.
Here is the gdb backtrace:

Thread 10 "sushi_b64" hit Catchpoint 1 (signal SIGXCPU), __GI___mmap64 (
    offset=<optimized out>, fd=-1, flags=16418, prot=0, len=134217728, 
    addr=<optimized out>) at ../sysdeps/unix/sysv/linux/mmap64.c:52
52	../sysdeps/unix/sysv/linux/mmap64.c: No such file or directory.
(gdb) bt
#0  __GI___mmap64 (offset=<optimized out>, fd=-1, flags=16418, prot=0, 
    len=134217728, addr=<optimized out>)
    at ../sysdeps/unix/sysv/linux/mmap64.c:52
#1  __GI___mmap64 (addr=addr@entry=0x0, len=len@entry=134217728, 
    prot=prot@entry=0, flags=flags@entry=16418, fd=fd@entry=-1, 
    offset=offset@entry=0) at ../sysdeps/unix/sysv/linux/mmap64.c:40
#2  0x0000007ff77169c4 in new_heap (size=135168, size@entry=2824, 
    top_pad=<optimized out>) at arena.c:487
#3  0x0000007ff7717548 in _int_new_arena (size=576) at arena.c:911
#4  arena_get2 (avoid_arena=0x0, size=576) at arena.c:911
#5  arena_get2 (size=576, avoid_arena=0x0) at arena.c:872
#6  0x0000007ff7719e2c in tcache_init () at malloc.c:2994
#7  0x0000007ff771abc8 in tcache_init () at malloc.c:3050
#8  __GI___libc_malloc (bytes=24) at malloc.c:3050
#9  0x0000007ff796f46c in operator new(unsigned long) ()
   from /usr/lib/libstdc++.so.6
#10 0x0000007feeb57540 in juce::ThreadLocalValue<bool>::get (this=0x5555808f88)
    at /opt/elk/1.0/sysroots/aarch64-elk-linux/usr/include/c++/8.3.0/bits/atomic_base.h:707
#11 juce::ThreadLocalValue<bool>::operator= (newValue=<optimized out>, 
    at /home/domenico/elkJUCE/modules/juce_core/threads/juce_ThreadLocalValue.h:88
--Type <RET> for more, q to quit, c to continue without paging--c
#12 JuceVSTWrapper::setParameter (value=0, index=<optimized out>, this=0x5555808b00) at /home/domenico/elkJUCE/modules/juce_audio_plugin_client/VST/juce_VST_Wrapper.cpp:795
#13 JuceVSTWrapper::setParameterCB (vstInterface=<optimized out>, index=<optimized out>, value=0) at /home/domenico/elkJUCE/modules/juce_audio_plugin_client/VST/juce_VST_Wrapper.cpp:802
#14 0x00000055555b74b4 in ?? ()
#15 0x00000055555b78ec in ?? ()
#16 0x00000055555ab90c in ?? ()
#17 0x0000005555646dc4 in ?? ()
#18 0x0000005555635eec in ?? ()
#19 0x0000007ff7e9c0c8 in ?? () from /usr/xenomai/lib/libcobalt.so.2
#20 0x0000007ff7da5824 in start_thread (arg=0x7ffffff406) at pthread_create.c:486
#21 0x0000007ff77717bc in thread_start () at ../sysdeps/unix/sysv/linux/aarch64/clone.S:78