A mapping show as following:
hctx cpus
hctx0 0 1
hctx1 2
hctx2 3
hctx3 4 5
Signed-off-by: weiping zhang <zhangweiping@xxxxxxxxxxxxxxx>
---
block/blk-mq-debugfs.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index 9ebc294..a311d5a 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -175,6 +175,23 @@ static int queue_poll_stat_show(void *data, struct seq_file *m)
return 0;
}
+static int queue_mapping_show(void *data, struct seq_file *m)
+{
+ struct request_queue *q = data;
+ struct blk_mq_hw_ctx *hctx;
+ struct blk_mq_ctx *ctx;
+ int i, j;
+
+ seq_puts(m, "hctx\t\tcpus\n");
+ queue_for_each_hw_ctx(q, hctx, i) {
+ seq_printf(m, "hctx%u\t\t", hctx->queue_num);
+ hctx_for_each_ctx(hctx, ctx, j)
+ seq_printf(m, "%3u ", ctx->cpu);
+ seq_puts(m, "\n");
+ }
+ return 0;
+}
+
#define HCTX_STATE_NAME(name) [BLK_MQ_S_##name] = #name
static const char *const hctx_state_name[] = {
HCTX_STATE_NAME(STOPPED),
@@ -754,6 +771,7 @@ static const struct blk_mq_debugfs_attr blk_mq_debugfs_queue_attrs[] = {
{"requeue_list", 0400, .seq_ops = &queue_requeue_list_seq_ops},
{"state", 0600, queue_state_show, queue_state_write},
{"write_hints", 0600, queue_write_hint_show, queue_write_hint_store},
+ {"mapping", 0400, queue_mapping_show},
{},
};
--
2.9.4
