дать совет по использованию памяти (give advice about use of memory)
Синопсис (Synopsis)
#include <sys/mman.h>
int madvise(void *addr, size_t length, int advice);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
madvise():
Since glibc 2.19:
_DEFAULT_SOURCE
Up to and including glibc 2.19:
_BSD_SOURCE
