X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fpagealign_alloc.c;h=01bb9e092f84e44a8ae9e3d18a5c15c81c2233ef;hb=dd5c6076e60de0237ab75d5a3a77070231d6c0fd;hp=8aefea3f97fe3dd5d3b21693dbff158c12449b07;hpb=441aa3044f43e5572f58c354f01e6bc070acd5c7;p=gnulib.git

diff --git a/lib/pagealign_alloc.c b/lib/pagealign_alloc.c
index 8aefea3f9..01bb9e092 100644
--- a/lib/pagealign_alloc.c
+++ b/lib/pagealign_alloc.c
@@ -1,6 +1,6 @@
 /* Memory allocation aligned to system page boundaries.
 
-   Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2005-2007, 2009-2012 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -123,6 +123,9 @@ void *
 pagealign_alloc (size_t size)
 {
   void *ret;
+  /* We prefer the mmap() approach over the posix_memalign() or malloc()
+     based approaches, since the latter often waste an entire memory page
+     per call.  */
 #if HAVE_MMAP
 # ifdef HAVE_MAP_ANONYMOUS
   const int fd = -1;