X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=HOWTO;h=d9e881abdcc3aa2495cc18957d3b4c681d943f8d;hp=cae95b7720f210893bb7b89a5b445ba61a980bf5;hb=7922a7b75ea9f5cdc7505bb98bbed100d3e3d124;hpb=54227e6bb2e5027620b25fa216d0e4c118e9a9fb

diff --git a/HOWTO b/HOWTO
index cae95b77..d9e881ab 100644
--- a/HOWTO
+++ b/HOWTO
@@ -543,6 +543,8 @@ Parameter types
 
 	If the option accepts an upper and lower range, use a colon ':' or
 	minus '-' to separate such values. See :ref:`irange <irange>`.
+	If the lower value specified happens to be larger than the upper value,
+	two values are swapped.
 
 .. _bool:
 
@@ -1466,6 +1468,9 @@ Buffers and memory
 		**mmapshared**
 			Same as mmap, but use a MMAP_SHARED mapping.
 
+		**cudamalloc**
+			Use GPU memory as the buffers for GPUDirect RDMA benchmark.
+
 	The area allocated is a function of the maximum allowed bs size for the job,
 	multiplied by the I/O depth given. Note that for **shmhuge** and
 	**mmaphuge** to work, the system must have free huge pages allocated. This
@@ -1673,6 +1678,11 @@ I/O engine
 			DDIR_TRIM
 				does fallocate(,mode = FALLOC_FL_KEEP_SIZE|FALLOC_FL_PUNCH_HOLE).
 
+		**ftruncate**
+			I/O engine that sends :manpage:`ftruncate(2)` operations in response
+			to write (DDIR_WRITE) events. Each ftruncate issued sets the file's
+			size to the current block offset. Block size is ignored.
+
 		**e4defrag**
 			I/O engine that does regular EXT4_IOC_MOVE_EXT ioctls to simulate
 			defragment activity in request to DDIR_WRITE event.