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Commit 9bba8724 authored Sep 28, 2023 by Bart Van Assche

task_profiles.json: Set io.prio.class



Provide an additional way to request the block layer to prioritize
foreground I/O over background I/O. This patch prepares for tests with
the mq-deadline I/O scheduler. While CFQ and BFQ support a "weight"
cgroup attribute, the mq-deadline scheduler does not. The mq-deadline
I/O scheduler only supports the I/O priority class for differentiating
I/O priorities.

The io.prio.class attribute is declared optional since this attribute
only exists if CONFIG_BLK_CGROUP_IOPRIO != n in the kernel
configuration.

Bug: 186902601
Change-Id: Iee1004cd0996e32245aff2b51772ef40178e024f
Signed-off-by: Bart Van Assche <bvanassche@google.com>

parent fb3e64ab

libprocessgroup/profiles/task_profiles.json

+41 −0

Original line number	Diff line number	Diff line
		@@ -91,6 +91,11 @@
		"Name": "CfqWeight",
		"Controller": "io",
		"File": "io.weight"
		},
		{
		"Name": "IoPrioClass",
		"Controller": "io",
		"File": "io.prio.class"
		}
		],

		@@ -479,6 +484,15 @@
		"Value": "200",
		"Optional": "true"
		}
		},
		{
		"Name": "SetAttribute",
		"Params":
		{
		"Name": "IoPrioClass",
		"Value": "restrict-to-be",
		"Optional": "true"
		}
		}
		]
		},
		@@ -511,6 +525,15 @@
		"Value": "1000",
		"Optional": "true"
		}
		},
		{
		"Name": "SetAttribute",
		"Params":
		{
		"Name": "IoPrioClass",
		"Value": "restrict-to-be",
		"Optional": "true"
		}
		}
		]
		},
		@@ -543,6 +566,15 @@
		"Value": "1000",
		"Optional": "true"
		}
		},
		{
		"Name": "SetAttribute",
		"Params":
		{
		"Name": "IoPrioClass",
		"Value": "promote-to-rt",
		"Optional": "true"
		}
		}
		]
		},
		@@ -575,6 +607,15 @@
		"Value": "1000",
		"Optional": "true"
		}
		},
		{
		"Name": "SetAttribute",
		"Params":
		{
		"Name": "IoPrioClass",
		"Value": "promote-to-rt",
		"Optional": "true"
		}
		}
		]
		},