f2fs: fix description about discard_granularity node

Let's fix the inconsistency in the text description.
Default discard granularity is 16. For small devices,
default value is 1.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
index 24e7cb7..3240478 100644 (file)
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -138,7 +138,8 @@ Contact:    "Chao Yu" <yuchao0@huawei.com>
 Description:   Controls discard granularity of inner discard thread. Inner thread
                will not issue discards with size that is smaller than granularity.
                The unit size is one block(4KB), now only support configuring
-               in range of [1, 512]. Default value is 4(=16KB).
+               in range of [1, 512]. Default value is 16.
+               For small devices, default value is 1.
 
 What:          /sys/fs/f2fs/<disk>/umount_discard_timeout
 Date:          January 2019