Re: [PATCH v10 23/24] x86/resctrl: Introduce interface to list assignment states of all the groups

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Hi Tony,

On 12/12/2024 4:57 PM, Luck, Tony wrote:
On Thu, Dec 12, 2024 at 02:15:26PM -0600, Babu Moger wrote:
+static int rdtgroup_mbm_assign_control_show(struct kernfs_open_file *of,
+					    struct seq_file *s, void *v)
+{
+	struct rdt_resource *r = of->kn->parent->priv;
+	struct rdt_mon_domain *dom;
+	struct rdtgroup *rdtg;
+	char str[10];
+
+	cpus_read_lock();
+	mutex_lock(&rdtgroup_mutex);
+	rdt_last_cmd_clear();
+
+	if (!resctrl_arch_mbm_cntr_assign_enabled(r)) {
+		rdt_last_cmd_puts("mbm_cntr_assign mode is not enabled\n");
+		mutex_unlock(&rdtgroup_mutex);
+		cpus_read_unlock();
+		return -EINVAL;
+	}
+
+	list_for_each_entry(rdtg, &rdt_all_groups, rdtgroup_list) {
+		struct rdtgroup *crg;
+
+		seq_printf(s, "%s//", rdtg->kn->name);
+
+		list_for_each_entry(dom, &r->mon_domains, hdr.list)
+			seq_printf(s, "%d=%s;", dom->hdr.id,
+				   rdtgroup_mon_state_to_str(r, dom, rdtg, str));
+		seq_putc(s, '\n');

Other resctrl files with domain lists use ';' as a separator, not a
terminator. This code results in:

//0=tl;1=tl;

rather than

//0=tl;1=tl

Agree. Will correct it.

+
+		list_for_each_entry(crg, &rdtg->mon.crdtgrp_list,
+				    mon.crdtgrp_list) {
+			seq_printf(s, "%s/%s/", rdtg->kn->name, crg->kn->name);
+
+			list_for_each_entry(dom, &r->mon_domains, hdr.list)
+				seq_printf(s, "%d=%s;", dom->hdr.id,
+					   rdtgroup_mon_state_to_str(r, dom, crg, str));
+			seq_putc(s, '\n');

Ditto.

Sure.


+		}
+	}
+
+	mutex_unlock(&rdtgroup_mutex);
+	cpus_read_unlock();
+	return 0;
+}


thanks
Babu




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