[PATCH] Support for mmap of hugetlb files as memory backing

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 6ac744cd3d436124f8474ff135c7a842fb92136b..f5e2449c22d64956015d983c04c1f93aa8dc9840 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -362,6 +362,10 @@ mem=str            Fio can use various types of memory as the io unit buffer.
                        mmap    Use anonymous memory maps as the buffers.
                                Allocated through mmap(2).
 
                        mmap    Use anonymous memory maps as the buffers.
                                Allocated through mmap(2).
 

+                       mmaphuge Use a memory mapped huge file as the buffer
+                               backing. Append filename after mmaphuge, ala
+                               mem=mmaphuge:/hugetlbfs/file
+

                The area allocated is a function of the maximum allowed
                bs size for the job, multiplied by the io depth given.
 
                The area allocated is a function of the maximum allowed
                bs size for the job, multiplied by the io depth given.