Commit d5dfd6c9 authored by Li Nan's avatar Li Nan
Browse files

cgroup: Support iocost for cgroup v1 

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8ND38



---------------------------

Since iocost can only be used in cgroup v2, add it to v1 now.
Provide config BLK_CGROUP_LEGACY_IOCOST to control this feature.

Signed-off-by: default avatarLi Nan <linan122@huawei.com>
parent a98f9d74

block/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -188,6 +188,16 @@ config BLK_CGROUP_IOCOST 
	distributes IO capacity between different groups based on

	their share of the overall weight distribution.



config BLK_CGROUP_LEGACY_IOCOST

	bool "Enable iocost in cgroup v1"

	default n

	depends on BLK_CGROUP_IOCOST=y

	help

	Enabling this option enables the .cost.weight interface for cost

	model based proportional IO control when cgroup is version 1.



	If unsure, say N.



config BLK_CGROUP_IOPRIO

	bool "Cgroup I/O controller for assigning an I/O priority class"

	depends on BLK_CGROUP

block/blk-iocost.c

+27 −0
Original line number Diff line number Diff line
@@ -3490,6 +3490,30 @@ static ssize_t ioc_cost_model_write(struct kernfs_open_file *of, char *input, 
	return ret;

}



#ifdef CONFIG_BLK_CGROUP_LEGACY_IOCOST

static struct cftype ioc_legacy_files[] = {

	{

		.name = "cost.weight",

		.flags = CFTYPE_NOT_ON_ROOT,

		.seq_show = ioc_weight_show,

		.write = ioc_weight_write,

	},

	{

		.name = "cost.qos",

		.flags = CFTYPE_ONLY_ON_ROOT,

		.seq_show = ioc_qos_show,

		.write = ioc_qos_write,

	},

	{

		.name = "cost.model",

		.flags = CFTYPE_ONLY_ON_ROOT,

		.seq_show = ioc_cost_model_show,

		.write = ioc_cost_model_write,

	},

	{}

};

#endif



static struct cftype ioc_files[] = {

	{

		.name = "weight",
@@ -3514,6 +3538,9 @@ static struct cftype ioc_files[] = { 


static struct blkcg_policy blkcg_policy_iocost = {

	.dfl_cftypes	= ioc_files,

#ifdef CONFIG_BLK_CGROUP_LEGACY_IOCOST

	.legacy_cftypes = ioc_legacy_files,

#endif

	.cpd_alloc_fn	= ioc_cpd_alloc,

	.cpd_free_fn	= ioc_cpd_free,

	.pd_alloc_fn	= ioc_pd_alloc,