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-rw-r--r--Documentation/cgroups/blkio-controller.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/cgroups/blkio-controller.txt b/Documentation/cgroups/blkio-controller.txt
index ed04fe9cce1..810e30171a5 100644
--- a/Documentation/cgroups/blkio-controller.txt
+++ b/Documentation/cgroups/blkio-controller.txt
@@ -134,6 +134,11 @@ Details of cgroup files
minor number of the device, third field specifies the operation type
and the fourth field specifies the io_wait_time in ns.
+- blkio.io_merged
+ - Total number of bios/requests merged into requests belonging to this
+ cgroup. This is further divided by the type of operation - read or
+ write, sync or async.
+
- blkio.dequeue
- Debugging aid only enabled if CONFIG_DEBUG_CFQ_IOSCHED=y. This
gives the statistics about how many a times a group was dequeued