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Diffstat (limited to 'kernel/cgroup/cgroup.c')
-rw-r--r--kernel/cgroup/cgroup.c75
1 files changed, 47 insertions, 28 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 1fb7f562289d..4b9ff41ca603 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -207,6 +207,8 @@ static u16 have_exit_callback __read_mostly;
static u16 have_release_callback __read_mostly;
static u16 have_canfork_callback __read_mostly;
+static bool have_favordynmods __ro_after_init = IS_ENABLED(CONFIG_CGROUP_FAVOR_DYNMODS);
+
/* cgroup namespace for init task */
struct cgroup_namespace init_cgroup_ns = {
.ns.count = REFCOUNT_INIT(2),
@@ -1350,7 +1352,9 @@ static void cgroup_destroy_root(struct cgroup_root *root)
cgroup_root_count--;
}
- cgroup_favor_dynmods(root, false);
+ if (!have_favordynmods)
+ cgroup_favor_dynmods(root, false);
+
cgroup_exit_root_id(root);
cgroup_unlock();
@@ -1719,20 +1723,22 @@ static int css_populate_dir(struct cgroup_subsys_state *css)
if (!css->ss) {
if (cgroup_on_dfl(cgrp)) {
- ret = cgroup_addrm_files(&cgrp->self, cgrp,
+ ret = cgroup_addrm_files(css, cgrp,
cgroup_base_files, true);
if (ret < 0)
return ret;
if (cgroup_psi_enabled()) {
- ret = cgroup_addrm_files(&cgrp->self, cgrp,
+ ret = cgroup_addrm_files(css, cgrp,
cgroup_psi_files, true);
if (ret < 0)
return ret;
}
} else {
- cgroup_addrm_files(css, cgrp,
- cgroup1_base_files, true);
+ ret = cgroup_addrm_files(css, cgrp,
+ cgroup1_base_files, true);
+ if (ret < 0)
+ return ret;
}
} else {
list_for_each_entry(cfts, &css->ss->cfts, node) {
@@ -1902,6 +1908,7 @@ enum cgroup2_param {
Opt_favordynmods,
Opt_memory_localevents,
Opt_memory_recursiveprot,
+ Opt_memory_hugetlb_accounting,
nr__cgroup2_params
};
@@ -1910,6 +1917,7 @@ static const struct fs_parameter_spec cgroup2_fs_parameters[] = {
fsparam_flag("favordynmods", Opt_favordynmods),
fsparam_flag("memory_localevents", Opt_memory_localevents),
fsparam_flag("memory_recursiveprot", Opt_memory_recursiveprot),
+ fsparam_flag("memory_hugetlb_accounting", Opt_memory_hugetlb_accounting),
{}
};
@@ -1936,6 +1944,9 @@ static int cgroup2_parse_param(struct fs_context *fc, struct fs_parameter *param
case Opt_memory_recursiveprot:
ctx->flags |= CGRP_ROOT_MEMORY_RECURSIVE_PROT;
return 0;
+ case Opt_memory_hugetlb_accounting:
+ ctx->flags |= CGRP_ROOT_MEMORY_HUGETLB_ACCOUNTING;
+ return 0;
}
return -EINVAL;
}
@@ -1960,6 +1971,11 @@ static void apply_cgroup_root_flags(unsigned int root_flags)
cgrp_dfl_root.flags |= CGRP_ROOT_MEMORY_RECURSIVE_PROT;
else
cgrp_dfl_root.flags &= ~CGRP_ROOT_MEMORY_RECURSIVE_PROT;
+
+ if (root_flags & CGRP_ROOT_MEMORY_HUGETLB_ACCOUNTING)
+ cgrp_dfl_root.flags |= CGRP_ROOT_MEMORY_HUGETLB_ACCOUNTING;
+ else
+ cgrp_dfl_root.flags &= ~CGRP_ROOT_MEMORY_HUGETLB_ACCOUNTING;
}
}
@@ -1973,6 +1989,8 @@ static int cgroup_show_options(struct seq_file *seq, struct kernfs_root *kf_root
seq_puts(seq, ",memory_localevents");
if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_RECURSIVE_PROT)
seq_puts(seq, ",memory_recursiveprot");
+ if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_HUGETLB_ACCOUNTING)
+ seq_puts(seq, ",memory_hugetlb_accounting");
return 0;
}
@@ -2243,9 +2261,9 @@ static int cgroup_init_fs_context(struct fs_context *fc)
fc->user_ns = get_user_ns(ctx->ns->user_ns);
fc->global = true;
-#ifdef CONFIG_CGROUP_FAVOR_DYNMODS
- ctx->flags |= CGRP_ROOT_FAVOR_DYNMODS;
-#endif
+ if (have_favordynmods)
+ ctx->flags |= CGRP_ROOT_FAVOR_DYNMODS;
+
return 0;
}
@@ -3867,14 +3885,6 @@ static __poll_t cgroup_pressure_poll(struct kernfs_open_file *of,
return psi_trigger_poll(&ctx->psi.trigger, of->file, pt);
}
-static int cgroup_pressure_open(struct kernfs_open_file *of)
-{
- if (of->file->f_mode & FMODE_WRITE && !capable(CAP_SYS_RESOURCE))
- return -EPERM;
-
- return 0;
-}
-
static void cgroup_pressure_release(struct kernfs_open_file *of)
{
struct cgroup_file_ctx *ctx = of->priv;
@@ -4917,9 +4927,11 @@ repeat:
void css_task_iter_start(struct cgroup_subsys_state *css, unsigned int flags,
struct css_task_iter *it)
{
+ unsigned long irqflags;
+
memset(it, 0, sizeof(*it));
- spin_lock_irq(&css_set_lock);
+ spin_lock_irqsave(&css_set_lock, irqflags);
it->ss = css->ss;
it->flags = flags;
@@ -4933,7 +4945,7 @@ void css_task_iter_start(struct cgroup_subsys_state *css, unsigned int flags,
css_task_iter_advance(it);
- spin_unlock_irq(&css_set_lock);
+ spin_unlock_irqrestore(&css_set_lock, irqflags);
}
/**
@@ -4946,12 +4958,14 @@ void css_task_iter_start(struct cgroup_subsys_state *css, unsigned int flags,
*/
struct task_struct *css_task_iter_next(struct css_task_iter *it)
{
+ unsigned long irqflags;
+
if (it->cur_task) {
put_task_struct(it->cur_task);
it->cur_task = NULL;
}
- spin_lock_irq(&css_set_lock);
+ spin_lock_irqsave(&css_set_lock, irqflags);
/* @it may be half-advanced by skips, finish advancing */
if (it->flags & CSS_TASK_ITER_SKIPPED)
@@ -4964,7 +4978,7 @@ struct task_struct *css_task_iter_next(struct css_task_iter *it)
css_task_iter_advance(it);
}
- spin_unlock_irq(&css_set_lock);
+ spin_unlock_irqrestore(&css_set_lock, irqflags);
return it->cur_task;
}
@@ -4977,11 +4991,13 @@ struct task_struct *css_task_iter_next(struct css_task_iter *it)
*/
void css_task_iter_end(struct css_task_iter *it)
{
+ unsigned long irqflags;
+
if (it->cur_cset) {
- spin_lock_irq(&css_set_lock);
+ spin_lock_irqsave(&css_set_lock, irqflags);
list_del(&it->iters_node);
put_css_set_locked(it->cur_cset);
- spin_unlock_irq(&css_set_lock);
+ spin_unlock_irqrestore(&css_set_lock, irqflags);
}
if (it->cur_dcset)
@@ -5275,7 +5291,6 @@ static struct cftype cgroup_psi_files[] = {
{
.name = "io.pressure",
.file_offset = offsetof(struct cgroup, psi_files[PSI_IO]),
- .open = cgroup_pressure_open,
.seq_show = cgroup_io_pressure_show,
.write = cgroup_io_pressure_write,
.poll = cgroup_pressure_poll,
@@ -5284,7 +5299,6 @@ static struct cftype cgroup_psi_files[] = {
{
.name = "memory.pressure",
.file_offset = offsetof(struct cgroup, psi_files[PSI_MEM]),
- .open = cgroup_pressure_open,
.seq_show = cgroup_memory_pressure_show,
.write = cgroup_memory_pressure_write,
.poll = cgroup_pressure_poll,
@@ -5293,7 +5307,6 @@ static struct cftype cgroup_psi_files[] = {
{
.name = "cpu.pressure",
.file_offset = offsetof(struct cgroup, psi_files[PSI_CPU]),
- .open = cgroup_pressure_open,
.seq_show = cgroup_cpu_pressure_show,
.write = cgroup_cpu_pressure_write,
.poll = cgroup_pressure_poll,
@@ -5303,7 +5316,6 @@ static struct cftype cgroup_psi_files[] = {
{
.name = "irq.pressure",
.file_offset = offsetof(struct cgroup, psi_files[PSI_IRQ]),
- .open = cgroup_pressure_open,
.seq_show = cgroup_irq_pressure_show,
.write = cgroup_irq_pressure_write,
.poll = cgroup_pressure_poll,
@@ -6121,7 +6133,7 @@ int __init cgroup_init(void)
if (cgroup1_ssid_disabled(ssid))
pr_info("Disabling %s control group subsystem in v1 mounts\n",
- ss->name);
+ ss->legacy_name);
cgrp_dfl_root.subsys_mask |= 1 << ss->id;
@@ -6764,6 +6776,12 @@ static int __init enable_cgroup_debug(char *str)
}
__setup("cgroup_debug", enable_cgroup_debug);
+static int __init cgroup_favordynmods_setup(char *str)
+{
+ return (kstrtobool(str, &have_favordynmods) == 0);
+}
+__setup("cgroup_favordynmods=", cgroup_favordynmods_setup);
+
/**
* css_tryget_online_from_dir - get corresponding css from a cgroup dentry
* @dentry: directory dentry of interest
@@ -7050,7 +7068,8 @@ static ssize_t features_show(struct kobject *kobj, struct kobj_attribute *attr,
"nsdelegate\n"
"favordynmods\n"
"memory_localevents\n"
- "memory_recursiveprot\n");
+ "memory_recursiveprot\n"
+ "memory_hugetlb_accounting\n");
}
static struct kobj_attribute cgroup_features_attr = __ATTR_RO(features);
generated by cgit (git 2.34.1) at 2024-06-20 12:32:45 +0000