[10/12] block, throttle: allow sharing cgroup statistic files

Commit Message

Paolo Valente Nov. 12, 2018, 9:56 a.m. UTC

From: Angelo Ruocco <[e-mail]>

Some of the cgroup files defined in the throttle policy have the same
meaning as those defined in the proportional share policy.

This commit uses the new file sharing interface in cgroup to share
these files.

Signed-off-by: Angelo Ruocco <[e-mail]>
Signed-off-by: Paolo Valente <[e-mail]>
---
 block/blk-throttle.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

Patch

diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 5c43821dc528..239957c12d34 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -1491,22 +1491,30 @@  static struct cftype throtl_legacy_files[] = {
 		.write = tg_set_conf_uint,
 	},
 	{
-		.name = "throttle.io_service_bytes",
+		.name = "io_service_bytes",
+		.owner_name = "throttle",
+		.flags = CFTYPE_SHARES_FILE,
 		.private = (unsigned long)&blkcg_policy_throtl,
 		.seq_show_cft = blkg_print_stat_bytes,
 	},
 	{
-		.name = "throttle.io_service_bytes_recursive",
+		.name = "io_service_bytes_recursive",
+		.owner_name = "throttle",
+		.flags = CFTYPE_SHARES_FILE,
 		.private = (unsigned long)&blkcg_policy_throtl,
 		.seq_show_cft = blkg_print_stat_bytes_recursive,
 	},
 	{
-		.name = "throttle.io_serviced",
+		.name = "io_serviced",
+		.owner_name = "throttle",
+		.flags = CFTYPE_SHARES_FILE,
 		.private = (unsigned long)&blkcg_policy_throtl,
 		.seq_show_cft = blkg_print_stat_ios,
 	},
 	{
-		.name = "throttle.io_serviced_recursive",
+		.name = "io_serviced_recursive",
+		.owner_name = "throttle",
+		.flags = CFTYPE_SHARES_FILE,
 		.private = (unsigned long)&blkcg_policy_throtl,
 		.seq_show_cft = blkg_print_stat_ios_recursive,
 	},