Update documentation for mmapshared (MMAP_SHARED)

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 40233bd90e5c1cf43a47541b8367506a46327dc5..81217b77906a6956d1e6bd8ebd70c2986dbb6348 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -1177,6 +1177,9 @@ mem=str           Fio can use various types of memory as the io unit buffer.
                                backing. Append filename after mmaphuge, ala
                                mem=mmaphuge:/hugetlbfs/file
 
+                       mmapshared      Same as mmap, but use a MMAP_SHARED
+                               mapping.
+
                The area allocated is a function of the maximum allowed
                bs size for the job, multiplied by the io depth given. Note
                that for shmhuge and mmaphuge to work, the system must have