X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=lib%2Fpagealign_alloc.c;h=01bb9e092f84e44a8ae9e3d18a5c15c81c2233ef;hb=25b6b5120113989e0b91de9d0b75d3d625bbc753;hp=f02f84eb7622e1439c8126125feb2f8619e1e250;hpb=b2e2010c7c902235b5efb5bd3c6529f61b093aa4;p=gnulib.git

diff --git a/lib/pagealign_alloc.c b/lib/pagealign_alloc.c
index f02f84eb7..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, 2009, 2010 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;