[PATCH] Version 1.10

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 6a7f58ed92d8fcc9e7a041e22b8a393c5786c425..19182019f7020389e6e5e48391e8f2b6f58b5871 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -359,8 +359,10 @@ mem=str            Fio can use various types of memory as the io unit buffer.
 
                        shmhuge Same as shm, but use huge pages as backing.
 
-                       mmap    Use anonymous memory maps as the buffers.
-                               Allocated through mmap(2).
+                       mmap    Use mmap to allocate buffers. May either be
+                               anonymous memory, or can be file backed if
+                               a filename is given after the option. The
+                               format is mem=mmap:/path/to/file.
 
                        mmaphuge Use a memory mapped huge file as the buffer
                                backing. Append filename after mmaphuge, ala