Why does realloc() return NULL?

[sgt_learn]

I am trying to use the kernel routine realloc(). It consistently returns NULL; supposedly because it cannot complete the request. And yet the kernel memory usage statistics ( vmstat -m) tick upward each time it is used.

 

[fluca1978]

Just a guess, maybe the M_NOWAIT flag has been specified?

or
NULL if the request could not be satisfied (implying that M_NOWAIT was
set).

 

[sgt_learn]

Sysctl_*

realloc() works fine. The problem I was having was related to how I used SYSCTL_*.

Thanks for the advice.