f2fs_io: add more description in read test
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c
index 1b290bc..c977f4d 100644
--- a/tools/f2fs_io/f2fs_io.c
+++ b/tools/f2fs_io/f2fs_io.c
@@ -937,10 +937,10 @@
" buffered : buffered IO\n" \
" dontcache: buffered IO + dontcache\n" \
" dio : direct IO\n" \
-" mmap : mmap IO\n" \
-" mlock : mmap + mlock\n" \
-" madvise : mmap + mlock2 + madvise\n" \
-" fadvise : mmap + fadvise + mlock\n" \
+" mmap : mmap(MAP_POPULATE) + mlock()\n" \
+" mlock : mmap() + mlock()\n" \
+" madvise : mmap() + mlock2(MLOCK_ONFAULT) + madvise(MADV_POPULATE_READ)\n" \
+" fadvise : mmap() + fadvise(POSIX_FADV_WILLNEED) + mlock()\n" \
"advice can be\n" \
" 1 : set sequential|willneed\n" \
" 0 : none\n" \
