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Commit 2796b569 authored by Hannes Reinecke's avatar Hannes Reinecke Committed by Christoph Hellwig
Browse files

nvme: add bio remapping tracepoint 



Adding a tracepoint to trace bio remapping for native nvme multipath.

Signed-off-by: default avatarHannes Reinecke <hare@suse.com>
Reviewed-by: default avatarSagi Grimberg <sagi@grimberg.me>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 16001c10

drivers/nvme/host/multipath.c

+4 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
 */



#include <linux/moduleparam.h>

#include <trace/events/block.h>

#include "nvme.h"



static bool multipath = true;
@@ -111,6 +112,9 @@ static blk_qc_t nvme_ns_head_make_request(struct request_queue *q, 
	if (likely(ns)) {

		bio->bi_disk = ns->disk;

		bio->bi_opf |= REQ_NVME_MPATH;

		trace_block_bio_remap(bio->bi_disk->queue, bio,

				      disk_devt(ns->head->disk),

				      bio->bi_iter.bi_sector);

		ret = direct_make_request(bio);

	} else if (!list_empty_careful(&head->list)) {

		dev_warn_ratelimited(dev, "no path available - requeuing I/O\n");