usemem: Update the usage of touch-alloc

The touch-alloc was updated to write memory in commit
3f9c6c227120db43873d1af20cea3f374eb99592.

This commit updates the usage of touch-alloc.

Signed-off-by: Hui Zhu <teawater@antfin.com>
Signed-off-by: Wu Fengguang <wfg@mail.ustc.edu.cn>

1 files changed, 1 insertions, 1 deletions

diff --git a/usemem.c b/usemem.c
index 0c76d17..3b4d207 100644
--- a/usemem.c
+++ b/usemem.c
@@ -158,7 +158,7 @@ void usage(int ok)
 	"    -Z|--read-again     read memory again after access the memory\n"
 	"    --punch-holes       free every other page after allocation\n"
 	"    --init-time         account/show initialization time separately from run time\n"
-	"    --touch-alloc       read memory after allocate it\n"
+	"    --touch-alloc       write memory to allocate the pages from Linux kernel after allocate it\n"
 	"    -h|--help           show this message\n"
 	,		ourname);