+.SH 注意
+.\" commit 3ee6dafc677a68e461a7ddafc94a580ebab80735
+Since Linux 2.6.23, \fBremap_file_pages\fP() creates non\-linear mappings only
+on in\-memory file systems such as tmpfs, hugetlbfs or ramfs. On filesystems
+with a backing store, \fBremap_file_pages\fP() is not much more efficient than
+using \fBmmap\fP(2) to adjust which parts of the file are mapped to which
+addresses.