nvme: add bio remapping tracepoint
Adding a tracepoint to trace bio remapping for native nvme multipath. Signed-off-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
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@ -12,6 +12,7 @@
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*/
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#include <linux/moduleparam.h>
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#include <trace/events/block.h>
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#include "nvme.h"
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static bool multipath = true;
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@ -111,6 +112,9 @@ static blk_qc_t nvme_ns_head_make_request(struct request_queue *q,
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if (likely(ns)) {
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bio->bi_disk = ns->disk;
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bio->bi_opf |= REQ_NVME_MPATH;
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trace_block_bio_remap(bio->bi_disk->queue, bio,
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disk_devt(ns->head->disk),
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bio->bi_iter.bi_sector);
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ret = direct_make_request(bio);
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} else if (!list_empty_careful(&head->list)) {
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dev_warn_ratelimited(dev, "no path available - requeuing I/O\n");
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