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| author | Hannes Reinecke <hare@suse.de> | 2021-12-20 13:51:45 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2021-12-23 11:22:46 +0100 |
| commit | e3d347943919f35ccdeed8d2cc62e8c6c12b36cd (patch) | |
| tree | 361f6bebf41cb28c5f4a846d2cc294683db5f91a /drivers/nvme/host/nvme.h | |
| parent | 3a605e32a7f8f78d844b4272c257029c337a4352 (diff) | |
| download | linux-e3d347943919f35ccdeed8d2cc62e8c6c12b36cd.tar.bz2 | |
nvme: add 'iopolicy' module parameter
While the 'iopolicy' sysfs attribute can be set at runtime, most
storage arrays prefer to use the 'round-robin' iopolicy per default.
We can use udev rules to set this, but is getting rather unwieldy
for rebranded arrays as we would have to update the udev rules
anytime a new array shows up, leading to the same mess we currently
have in multipathd for configuring the RDAC arrays.
Hence this patch adds a module parameter 'iopolicy' to allow the
admin to switch the default, and to do away with the need for a
udev rule here.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme/host/nvme.h')
| -rw-r--r-- | drivers/nvme/host/nvme.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index a54096ba0552..fe224016418e 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -767,6 +767,7 @@ static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl) void nvme_mpath_unfreeze(struct nvme_subsystem *subsys); void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys); void nvme_mpath_start_freeze(struct nvme_subsystem *subsys); +void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys); bool nvme_mpath_set_disk_name(struct nvme_ns *ns, char *disk_name, int *flags); void nvme_failover_req(struct request *req); void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl); @@ -864,6 +865,9 @@ static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys) static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys) { } +static inline void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys) +{ +} #endif /* CONFIG_NVME_MULTIPATH */ int nvme_revalidate_zones(struct nvme_ns *ns); |