pmemblk, dev-dax: Update descriptions

Make the descriptions of the pmemblk and dev-dax ioengines
more symmetric.

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

diff --git a/HOWTO b/HOWTO
index 33f8718a94d0352f995827f63ed3384f83d9cd63..9c8a8375ae513a7775c08d0378a224930cafc681 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -904,11 +904,13 @@ ioengine=str      Defines how the job issues io to the file. The following
                                overwriting. The writetrim mode works well
                                for this constraint.
 
-                       pmemblk Read and write through the NVML libpmemblk
-                               interface.
+                       pmemblk Read and write using filesystem DAX to a file
+                               on a filesystem mounted with DAX on a persistent
+                               memory device through the NVML libpmemblk library.
 
-                       dev-dax Read and write through a DAX device exposed
-                               from persistent memory.
+                       dev-dax Read and write using device DAX to a persistent
+                               memory device (e.g., /dev/dax0.0) through the
+                               NVML libpmem library.
 
                        external Prefix to specify loading an external
                                IO engine object file. Append the engine

diff --git a/fio.1 b/fio.1
index f486276358b4230fdea4693b7662b0d3b3d9a6eb..56f2d11078b583aa4c6844d7fd39c4bedc35dc33 100644 (file)
--- a/fio.1
+++ b/fio.1
@@ -811,10 +811,12 @@ and discarding before overwriting. The trimwrite mode works well for this
 constraint.
 .TP
 .B pmemblk
-Read and write through the NVML libpmemblk interface.
+Read and write using filesystem DAX to a file on a filesystem mounted with
+DAX on a persistent memory device through the NVML libpmemblk library.
 .TP
 .B dev-dax
-Read and write through a DAX device exposed from persistent memory.
+Read and write using device DAX to a persistent memory device
+(e.g., /dev/dax0.0) through the NVML libpmem library.
 .RE
 .P
 .RE