}
}
+static void hugetlb_cgroup_free(struct hugetlb_cgroup *h_cgroup)
+{
+ int node;
+
+ for_each_node(node)
+ kfree(h_cgroup->nodeinfo[node]);
+ kfree(h_cgroup);
+}
+
static struct cgroup_subsys_state *
hugetlb_cgroup_css_alloc(struct cgroup_subsys_state *parent_css)
{
struct hugetlb_cgroup *parent_h_cgroup = hugetlb_cgroup_from_css(parent_css);
struct hugetlb_cgroup *h_cgroup;
+ int node;
+
+ h_cgroup = kzalloc(struct_size(h_cgroup, nodeinfo, nr_node_ids),
+ GFP_KERNEL);
- h_cgroup = kzalloc(sizeof(*h_cgroup), GFP_KERNEL);
if (!h_cgroup)
return ERR_PTR(-ENOMEM);
if (!parent_h_cgroup)
root_h_cgroup = h_cgroup;
+ /*
+ * TODO: this routine can waste much memory for nodes which will
+ * never be onlined. It's better to use memory hotplug callback
+ * function.
+ */
+ for_each_node(node) {
+ /* Set node_to_alloc to -1 for offline nodes. */
+ int node_to_alloc =
+ node_state(node, N_NORMAL_MEMORY) ? node : -1;
+ h_cgroup->nodeinfo[node] =
+ kzalloc_node(sizeof(struct hugetlb_cgroup_per_node),
+ GFP_KERNEL, node_to_alloc);
+ if (!h_cgroup->nodeinfo[node])
+ goto fail_alloc_nodeinfo;
+ }
+
hugetlb_cgroup_init(h_cgroup, parent_h_cgroup);
return &h_cgroup->css;
+
+fail_alloc_nodeinfo:
+ hugetlb_cgroup_free(h_cgroup);
+ return ERR_PTR(-ENOMEM);
}
static void hugetlb_cgroup_css_free(struct cgroup_subsys_state *css)
{
- struct hugetlb_cgroup *h_cgroup;
-
- h_cgroup = hugetlb_cgroup_from_css(css);
- kfree(h_cgroup);
+ hugetlb_cgroup_free(hugetlb_cgroup_from_css(css));
}
/*
return;
__set_hugetlb_cgroup(page, h_cg, rsvd);
- return;
+ if (!rsvd) {
+ unsigned long usage =
+ h_cg->nodeinfo[page_to_nid(page)]->usage[idx];
+ /*
+ * This write is not atomic due to fetching usage and writing
+ * to it, but that's fine because we call this with
+ * hugetlb_lock held anyway.
+ */
+ WRITE_ONCE(h_cg->nodeinfo[page_to_nid(page)]->usage[idx],
+ usage + nr_pages);
+ }
}
void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages,
if (rsvd)
css_put(&h_cg->css);
-
- return;
+ else {
+ unsigned long usage =
+ h_cg->nodeinfo[page_to_nid(page)]->usage[idx];
+ /*
+ * This write is not atomic due to fetching usage and writing
+ * to it, but that's fine because we call this with
+ * hugetlb_lock held anyway.
+ */
+ WRITE_ONCE(h_cg->nodeinfo[page_to_nid(page)]->usage[idx],
+ usage - nr_pages);
+ }
}
void hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages,
RES_RSVD_FAILCNT,
};
+static int hugetlb_cgroup_read_numa_stat(struct seq_file *seq, void *dummy)
+{
+ int nid;
+ struct cftype *cft = seq_cft(seq);
+ int idx = MEMFILE_IDX(cft->private);
+ bool legacy = MEMFILE_ATTR(cft->private);
+ struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(seq_css(seq));
+ struct cgroup_subsys_state *css;
+ unsigned long usage;
+
+ if (legacy) {
+ /* Add up usage across all nodes for the non-hierarchical total. */
+ usage = 0;
+ for_each_node_state(nid, N_MEMORY)
+ usage += READ_ONCE(h_cg->nodeinfo[nid]->usage[idx]);
+ seq_printf(seq, "total=%lu", usage * PAGE_SIZE);
+
+ /* Simply print the per-node usage for the non-hierarchical total. */
+ for_each_node_state(nid, N_MEMORY)
+ seq_printf(seq, " N%d=%lu", nid,
+ READ_ONCE(h_cg->nodeinfo[nid]->usage[idx]) *
+ PAGE_SIZE);
+ seq_putc(seq, '\n');
+ }
+
+ /*
+ * The hierarchical total is pretty much the value recorded by the
+ * counter, so use that.
+ */
+ seq_printf(seq, "%stotal=%lu", legacy ? "hierarchical_" : "",
+ page_counter_read(&h_cg->hugepage[idx]) * PAGE_SIZE);
+
+ /*
+ * For each node, transverse the css tree to obtain the hierarchical
+ * node usage.
+ */
+ for_each_node_state(nid, N_MEMORY) {
+ usage = 0;
+ rcu_read_lock();
+ css_for_each_descendant_pre(css, &h_cg->css) {
+ usage += READ_ONCE(hugetlb_cgroup_from_css(css)
+ ->nodeinfo[nid]
+ ->usage[idx]);
+ }
+ rcu_read_unlock();
+ seq_printf(seq, " N%d=%lu", nid, usage * PAGE_SIZE);
+ }
+
+ seq_putc(seq, '\n');
+
+ return 0;
+}
+
static u64 hugetlb_cgroup_read_u64(struct cgroup_subsys_state *css,
struct cftype *cft)
{
events_local_file[idx]);
cft->flags = CFTYPE_NOT_ON_ROOT;
- /* NULL terminate the last cft */
+ /* Add the numa stat file */
cft = &h->cgroup_files_dfl[6];
+ snprintf(cft->name, MAX_CFTYPE_NAME, "%s.numa_stat", buf);
+ cft->seq_show = hugetlb_cgroup_read_numa_stat;
+ cft->flags = CFTYPE_NOT_ON_ROOT;
+
+ /* NULL terminate the last cft */
+ cft = &h->cgroup_files_dfl[7];
memset(cft, 0, sizeof(*cft));
WARN_ON(cgroup_add_dfl_cftypes(&hugetlb_cgrp_subsys,
cft->write = hugetlb_cgroup_reset;
cft->read_u64 = hugetlb_cgroup_read_u64;
- /* NULL terminate the last cft */
+ /* Add the numa stat file */
cft = &h->cgroup_files_legacy[8];
+ snprintf(cft->name, MAX_CFTYPE_NAME, "%s.numa_stat", buf);
+ cft->private = MEMFILE_PRIVATE(idx, 1);
+ cft->seq_show = hugetlb_cgroup_read_numa_stat;
+
+ /* NULL terminate the last cft */
+ cft = &h->cgroup_files_legacy[9];
memset(cft, 0, sizeof(*cft));
WARN_ON(cgroup_add_legacy_cftypes(&hugetlb_cgrp_subsys,
projects / kernel.git / commitdiff