X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fpagealign_alloc.c;h=94a85fcf9ba256b70c4e73d7b8d92136f5abe759;hb=1276a2c5f24c0c932426aca9c899fa524d2443f2;hp=337091dcaea8d5c30c71fb7c3be2c83bce2f1c47;hpb=3030c5b5e0a5199e16b05927da72c43c42f211c3;p=gnulib.git

diff --git a/lib/pagealign_alloc.c b/lib/pagealign_alloc.c
index 337091dca..94a85fcf9 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, 2009 Free Software Foundation, Inc.
+   Copyright (C) 2005-2007, 2009-2014 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;