[PATCH 3/3] cgroup: Try to use blkio.bfq.weight if blkio.weight is not available

[Andreas Herrmann <aherrmann@suse.com>]

Newer kernels just provide blkio.bfq.weight for blkio contoller. Try
to use this attribute when legacy file is not available.

Signed-off-by: Andreas Herrmann <aherrmann@suse.com>
---
 cgroup.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/cgroup.c b/cgroup.c
index 43513733..6edb5b14 100644
--- a/cgroup.c
+++ b/cgroup.c
@@ -218,8 +218,14 @@ int cgroup_setup(struct thread_data *td, struct flist_head *clist, struct cgroup
 		}
 		if (write_int_to_file(td, root, "blkio.weight",
 					td->o.cgroup_weight,
-					"cgroup open weight"))
-			goto err;
+					"cgroup open blkio.weight")) {
+			td_clear_error(td);
+			log_err("Trying to use blkio.bfq.weight\n");
+			if (write_int_to_file(td, root, "blkio.bfq.weight",
+						td->o.cgroup_weight,
+						"cgroup open blkio.bfq.weight"))
+				goto err;
+		}
 	}
 
 	if (!cgroup_write_pid(td, root, (*mnt)->cgroup2)) {
-- 
2.28.0