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| author | Hannes Reinecke <hare@suse.de> | 2018-06-07 10:38:47 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-06-11 16:17:46 +0200 |
| commit | 2796b569591c6f0681303f148a55e50c2cc8304a (patch) | |
| tree | d8e60ff29027a3b5825d46aefaaccb20f353ebda /drivers/nvme/host/multipath.c | |
| parent | nvme: fix NULL pointer dereference in nvme_init_subsystem (diff) | |
| download | linux-2796b569591c6f0681303f148a55e50c2cc8304a.tar.xz linux-2796b569591c6f0681303f148a55e50c2cc8304a.zip | |
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>
Diffstat (limited to '')
| -rw-r--r-- | drivers/nvme/host/multipath.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index d7b664ae5923..1ffd3e8b13a1 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -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"); |