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-rw-r--r--block/blk-mq-sysfs.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c
index b91ce75bd35d..b0ba264b0522 100644
--- a/block/blk-mq-sysfs.c
+++ b/block/blk-mq-sysfs.c
@@ -244,6 +244,32 @@ static ssize_t blk_mq_hw_sysfs_tags_show(struct blk_mq_hw_ctx *hctx, char *page)
return blk_mq_tag_sysfs_show(hctx->tags, page);
}
+static ssize_t blk_mq_hw_sysfs_cpus_show(struct blk_mq_hw_ctx *hctx, char *page)
+{
+ unsigned int i, queue_num, first = 1;
+ ssize_t ret = 0;
+
+ blk_mq_disable_hotplug();
+
+ for_each_online_cpu(i) {
+ queue_num = hctx->queue->mq_map[i];
+ if (queue_num != hctx->queue_num)
+ continue;
+
+ if (first)
+ ret += sprintf(ret + page, "%u", i);
+ else
+ ret += sprintf(ret + page, ", %u", i);
+
+ first = 0;
+ }
+
+ blk_mq_enable_hotplug();
+
+ ret += sprintf(ret + page, "\n");
+ return ret;
+}
+
static struct blk_mq_ctx_sysfs_entry blk_mq_sysfs_dispatched = {
.attr = {.name = "dispatched", .mode = S_IRUGO },
.show = blk_mq_sysfs_dispatched_show,
@@ -294,6 +320,10 @@ static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_tags = {
.attr = {.name = "tags", .mode = S_IRUGO },
.show = blk_mq_hw_sysfs_tags_show,
};
+static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_cpus = {
+ .attr = {.name = "cpu_list", .mode = S_IRUGO },
+ .show = blk_mq_hw_sysfs_cpus_show,
+};
static struct attribute *default_hw_ctx_attrs[] = {
&blk_mq_hw_sysfs_queued.attr,
@@ -302,6 +332,7 @@ static struct attribute *default_hw_ctx_attrs[] = {
&blk_mq_hw_sysfs_pending.attr,
&blk_mq_hw_sysfs_ipi.attr,
&blk_mq_hw_sysfs_tags.attr,
+ &blk_mq_hw_sysfs_cpus.attr,
NULL,
};