This tunable namespace supports operations that affect the way the GNU C Library and the process manage memory.
If the kernel supports naming anonymous virtual memory areas (since
Linux version 5.17, although not always enabled by some kernel
configurations), this tunable can be used to control whether
the GNU C Library decorates the underlying memory obtained from operating
system with a string describing its usage (for instance, on the thread
stack created by pthread_create or memory allocated by
malloc).
The process mappings can be obtained by reading the /proc/<pid>/maps
(with pid being either the process ID or self for the
process own mapping).
This tunable takes a value of 0 and 1, where 1 enables the feature. The default value is ‘0’, which disables the decoration.