Migrate the blkio controller to the v2 cgroup hierarchy
There are multiple use cases in Android for which background writes need
to be controlled via the cgroup mechanism. The cgroup mechanism can only
control background writes if both the blkio and memcg controllers are
mounted in the v2 cgroup hierarchy. Hence this patch that migrates the
blkio controller from the v1 to the v2 cgroup hierarchy.
The changes compared to the previous version of this CL are as follows:
- The JoinCgroup actions for the "io" controller have been left out
since these caused processes to be migrated to the v2 root cgroup.
- The BfqWeight / CfqGroupIdle / CfqWeight settings have been included
in this CL instead of applying these settings as a separate CL.
Change-Id: I67e06ce3462bb1c1345dba78f8d3d655b6519c74
Signed-off-by: Bart Van Assche <bvanassche@google.com>
diff --git a/libprocessgroup/profiles/cgroups.json b/libprocessgroup/profiles/cgroups.json
index 3e4393d..d013ec8 100644
--- a/libprocessgroup/profiles/cgroups.json
+++ b/libprocessgroup/profiles/cgroups.json
@@ -1,13 +1,6 @@
{
"Cgroups": [
{
- "Controller": "blkio",
- "Path": "/dev/blkio",
- "Mode": "0775",
- "UID": "system",
- "GID": "system"
- },
- {
"Controller": "cpu",
"Path": "/dev/cpuctl",
"Mode": "0755",
@@ -39,6 +32,12 @@
{
"Controller": "freezer",
"Path": "."
+ },
+ {
+ "Controller": "io",
+ "Path": ".",
+ "NeedsActivation": true,
+ "Optional": true
}
]
}
diff --git a/libprocessgroup/profiles/task_profiles.json b/libprocessgroup/profiles/task_profiles.json
index 1fc66ba..2c08b0b 100644
--- a/libprocessgroup/profiles/task_profiles.json
+++ b/libprocessgroup/profiles/task_profiles.json
@@ -76,6 +76,21 @@
"Name": "FreezerState",
"Controller": "freezer",
"File": "cgroup.freeze"
+ },
+ {
+ "Name": "BfqWeight",
+ "Controller": "io",
+ "File": "io.bfq.weight"
+ },
+ {
+ "Name": "CfqGroupIdle",
+ "Controller": "io",
+ "File": "io.group_idle"
+ },
+ {
+ "Name": "CfqWeight",
+ "Controller": "io",
+ "File": "io.weight"
}
],
@@ -439,11 +454,30 @@
"Name": "LowIoPriority",
"Actions": [
{
- "Name": "JoinCgroup",
+ "Name": "SetAttribute",
"Params":
{
- "Controller": "blkio",
- "Path": "background"
+ "Name": "BfqWeight",
+ "Value": "10",
+ "Optional": "true"
+ }
+ },
+ {
+ "Name": "SetAttribute",
+ "Params":
+ {
+ "Name": "CfqGroupIdle",
+ "Value": "0",
+ "Optional": "true"
+ }
+ },
+ {
+ "Name": "SetAttribute",
+ "Params":
+ {
+ "Name": "CfqWeight",
+ "Value": "200",
+ "Optional": "true"
}
}
]
@@ -452,11 +486,30 @@
"Name": "NormalIoPriority",
"Actions": [
{
- "Name": "JoinCgroup",
+ "Name": "SetAttribute",
"Params":
{
- "Controller": "blkio",
- "Path": ""
+ "Name": "BfqWeight",
+ "Value": "100",
+ "Optional": "true"
+ }
+ },
+ {
+ "Name": "SetAttribute",
+ "Params":
+ {
+ "Name": "CfqGroupIdle",
+ "Value": "0",
+ "Optional": "true"
+ }
+ },
+ {
+ "Name": "SetAttribute",
+ "Params":
+ {
+ "Name": "CfqWeight",
+ "Value": "1000",
+ "Optional": "true"
}
}
]
@@ -465,11 +518,30 @@
"Name": "HighIoPriority",
"Actions": [
{
- "Name": "JoinCgroup",
+ "Name": "SetAttribute",
"Params":
{
- "Controller": "blkio",
- "Path": ""
+ "Name": "BfqWeight",
+ "Value": "100",
+ "Optional": "true"
+ }
+ },
+ {
+ "Name": "SetAttribute",
+ "Params":
+ {
+ "Name": "CfqGroupIdle",
+ "Value": "0",
+ "Optional": "true"
+ }
+ },
+ {
+ "Name": "SetAttribute",
+ "Params":
+ {
+ "Name": "CfqWeight",
+ "Value": "1000",
+ "Optional": "true"
}
}
]
@@ -478,11 +550,30 @@
"Name": "MaxIoPriority",
"Actions": [
{
- "Name": "JoinCgroup",
+ "Name": "SetAttribute",
"Params":
{
- "Controller": "blkio",
- "Path": ""
+ "Name": "BfqWeight",
+ "Value": "100",
+ "Optional": "true"
+ }
+ },
+ {
+ "Name": "SetAttribute",
+ "Params":
+ {
+ "Name": "CfqGroupIdle",
+ "Value": "0",
+ "Optional": "true"
+ }
+ },
+ {
+ "Name": "SetAttribute",
+ "Params":
+ {
+ "Name": "CfqWeight",
+ "Value": "1000",
+ "Optional": "true"
}
}
]
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 317f809..fb64736 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -219,26 +219,6 @@
write /dev/stune/nnapi-hal/schedtune.boost 1
write /dev/stune/nnapi-hal/schedtune.prefer_idle 1
- # Create blkio group and apply initial settings.
- # This feature needs kernel to support it, and the
- # device's init.rc must actually set the correct values.
- mkdir /dev/blkio/background
- chown system system /dev/blkio
- chown system system /dev/blkio/background
- chown system system /dev/blkio/tasks
- chown system system /dev/blkio/background/tasks
- chown system system /dev/blkio/cgroup.procs
- chown system system /dev/blkio/background/cgroup.procs
- chmod 0664 /dev/blkio/tasks
- chmod 0664 /dev/blkio/background/tasks
- chmod 0664 /dev/blkio/cgroup.procs
- chmod 0664 /dev/blkio/background/cgroup.procs
- write /dev/blkio/blkio.weight 1000
- write /dev/blkio/background/blkio.weight 200
- write /dev/blkio/background/blkio.bfq.weight 10
- write /dev/blkio/blkio.group_idle 0
- write /dev/blkio/background/blkio.group_idle 0
-
restorecon_recursive /mnt
mount configfs none /config nodev noexec nosuid