Add hot pull method for irqbalance

classify.c

@@ -852,3 +852,40 @@ void sort_irq_list(GList **list)
 {
 	*list = g_list_sort(*list, sort_irqs);
 }
+
+static void remove_no_existing_irq(struct irq_info *info, void *data __attribute__((unused)))
+{
+	GList *entry = NULL;
+
+	if (info->existing) {
+		/* clear existing flag for next detection */
+		info->existing = 0;
+		return;
+	}
+
+	entry = g_list_find_custom(interrupts_db, info, compare_ints);
+	if (entry)
+		interrupts_db = g_list_delete_link(interrupts_db, entry);
+
+	entry = g_list_find_custom(rebalance_irq_list, info, compare_ints);
+	if (entry)
+		rebalance_irq_list = g_list_delete_link(rebalance_irq_list, entry);
+
+	if(info->assigned_obj) {
+		entry = g_list_find_custom(info->assigned_obj->interrupts, info, compare_ints);
+	    if (entry) {
+			info->assigned_obj->interrupts = g_list_delete_link(info->assigned_obj->interrupts, entry);
+		}
+	}
+	log(TO_CONSOLE, LOG_INFO, "IRQ %d is removed from interrupts_db.\n", info->irq);
+	free_irq(info, NULL);
+}
+
+void clear_no_existing_irqs(void)
+{
+	for_each_irq(NULL, remove_no_existing_irq, NULL);
+	if (banned_irqs) {
+		for_each_irq(banned_irqs, remove_no_existing_irq, NULL);
+	}
+}
+

irqbalance.h

@@ -42,6 +42,7 @@ extern void set_interrupt_count(int number, uint64_t count);
 extern void set_msi_interrupt_numa(int number);
 extern void init_irq_class_and_type(char *savedline, struct irq_info *info, int irq);
 extern int proc_irq_hotplug(char *line, int irq, struct irq_info **pinfo);
+extern void clear_no_existing_irqs(void);
 
 extern GList *rebalance_irq_list;
 extern void force_rebalance_irq(struct irq_info *info, void *data __attribute__((unused)));

procinterrupts.c

@@ -248,7 +248,6 @@ GList* collect_full_irq_list()
 	return tmp_list;
 }
 
-
 void parse_proc_interrupts(void)
 {
 	FILE *file;
@@ -310,6 +309,7 @@ void parse_proc_interrupts(void)
 				break;
 			}
 		}
+		info->existing = 1;
 		free(savedline);
 
 		count = 0;
@@ -354,6 +354,8 @@ void parse_proc_interrupts(void)
  		 */
 		msi_found_in_sysfs = 1;
 	}
+	if (!need_rescan)
+		clear_no_existing_irqs();
 	fclose(file);
 	free(line);
 }

types.h

@@ -70,6 +70,7 @@ struct irq_info {
 	uint64_t last_irq_count;
 	uint64_t load;
 	int moved;
+	int existing;
 	struct topo_obj *assigned_obj;
 	char *name;
 };