[PATCH] Warning on hugepage-size setting in HOWTO

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/HOWTO b/HOWTO
index 3b270b1d723460110607b1c2b455d61f35164d06..6a7f58ed92d8fcc9e7a041e22b8a393c5786c425 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -387,6 +387,9 @@ mem=str             Fio can use various types of memory as the io unit buffer.
 hugepage-size=siint
                Defines the size of a huge page. Must at least be equal
                to the system setting, see /proc/meminfo. Defaults to 4MiB.
+               Should probably always be a multiple of megabytes, so using
+               hugepage-size=Xm is the preferred way to set this to avoid
+               setting a non-pow-2 bad value.
 
 exitall                When one job finishes, terminate the rest. The default is
                to wait for each job to finish, sometimes that is not the