core: introduce NUMAPolicy and NUMAMask options

Make possible to set NUMA allocation policy for manager. Manager's
policy is by default inherited to all forked off processes. However, it
is possible to override the policy on per-service basis. Currently we
support, these policies: default, prefer, bind, interleave, local.
See man 2 set_mempolicy for details on each policy.

Overall NUMA policy actually consists of two parts. Policy itself and
bitmask representing NUMA nodes where is policy effective. Node mask can
be specified using related option, NUMAMask. Default mask can be
overwritten on per-service level.

src/basic/missing_syscall.h

@@ -444,3 +444,46 @@ static inline ssize_t missing_statx(int dfd, const char *filename, unsigned flag
 
 #  define statx missing_statx
 #endif
+
+#if !HAVE_SET_MEMPOLICY
+
+enum {
+        MPOL_DEFAULT,
+        MPOL_PREFERRED,
+        MPOL_BIND,
+        MPOL_INTERLEAVE,
+        MPOL_LOCAL,
+};
+
+static inline long missing_set_mempolicy(int mode, const unsigned long *nodemask,
+                           unsigned long maxnode) {
+        long i;
+#  ifdef __NR_set_mempolicy
+        i = syscall(__NR_set_mempolicy, mode, nodemask, maxnode);
+#  else
+        errno = ENOSYS;
+        i = -1;
+#  endif
+        return i;
+}
+
+#  define set_mempolicy missing_set_mempolicy
+#endif
+
+
+#if !HAVE_GET_MEMPOLICY
+static inline long missing_get_mempolicy(int *mode, unsigned long *nodemask,
+                           unsigned long maxnode, void *addr,
+                           unsigned long flags) {
+        long i;
+#  ifdef __NR_get_mempolicy
+        i = syscall(__NR_get_mempolicy, mode, nodemask, maxnode, addr, flags);
+#  else
+        errno = ENOSYS;
+        i = -1;
+#  endif
+        return i;
+}
+
+#define get_mempolicy missing_get_mempolicy
+#endif