dm kcopyd: introduce configurable throttling

[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / md / dm-thin.c

diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 303e11d..35d9d03 100644 (file)
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -26,6 +26,9 @@
 #define PRISON_CELLS 1024
 #define COMMIT_PERIOD HZ
 
+DECLARE_DM_KCOPYD_THROTTLE_WITH_MODULE_PARM(snapshot_copy_throttle,
+               "A percentage of time allocated for copy on write");
+
 /*
  * The block size of the device holding pool data must be
  * between 64KB and 1GB.
@@ -1642,7 +1645,7 @@ static struct pool *pool_create(struct mapped_device *pool_md,
                goto bad_prison;
        }
 
-       pool->copier = dm_kcopyd_client_create();
+       pool->copier = dm_kcopyd_client_create(&dm_kcopyd_throttle);
        if (IS_ERR(pool->copier)) {
                r = PTR_ERR(pool->copier);
                *error = "Error creating pool's kcopyd client";