Docs/ABI/zram: document zram recompress sysfs knobs

Document zram re-compression sysfs knobs.

Link: https://lkml.kernel.org/r/20221115020314.386235-1-senozhatsky@chromium.org
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/Documentation/ABI/testing/sysfs-block-zram b/Documentation/ABI/testing/sysfs-block-zram
index 14b2bf2e5105ced6872477b0b85e6f24a76f1d08..628a00fb20a95185870e6acdef03d78cd194d817 100644 (file)
--- a/Documentation/ABI/testing/sysfs-block-zram
+++ b/Documentation/ABI/testing/sysfs-block-zram
@@ -137,3 +137,17 @@ Description:
                The writeback_limit file is read-write and specifies the maximum
                amount of writeback ZRAM can do. The limit could be changed
                in run time.
+
+What:          /sys/block/zram<id>/recomp_algorithm
+Date:          November 2022
+Contact:       Sergey Senozhatsky <senozhatsky@chromium.org>
+Description:
+               The recomp_algorithm file is read-write and allows to set
+               or show secondary compression algorithms.
+
+What:          /sys/block/zram<id>/recompress
+Date:          November 2022
+Contact:       Sergey Senozhatsky <senozhatsky@chromium.org>
+Description:
+               The recompress file is write-only and triggers re-compression
+               with secondary compression algorithms.