On 22/06/2024 8:14, Christoph Hellwig wrote:
diff --git a/block/blk-mq-cpumap.c b/block/blk-mq-cpumap.c
index 9638b25fd521..43c039900ef6 100644
--- a/block/blk-mq-cpumap.c
+++ b/block/blk-mq-cpumap.c
@@ -11,10 +11,23 @@
#include <linux/smp.h>
#include <linux/cpu.h>
#include <linux/group_cpus.h>
+#include <linux/sched/isolation.h>
#include "blk.h"
#include "blk-mq.h"
+unsigned int blk_mq_num_possible_queues(void)
+{
+ const struct cpumask *io_queue_mask;
+
+ io_queue_mask = housekeeping_cpumask(HK_TYPE_IO_QUEUE);
+ if (!cpumask_empty(io_queue_mask))
+ return cpumask_weight(io_queue_mask);
+
+ return num_possible_cpus();
+}
+EXPORT_SYMBOL_GPL(blk_mq_num_possible_queues);
This should be split into a separate patch. And it could really use
a kerneldoc comment.
Agree.
Other than that, looks good.
