diff options
Diffstat (limited to 'include/sys/vdev_impl.h')
| -rw-r--r-- | include/sys/vdev_impl.h | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/include/sys/vdev_impl.h b/include/sys/vdev_impl.h index b9298c62d..90d607746 100644 --- a/include/sys/vdev_impl.h +++ b/include/sys/vdev_impl.h @@ -69,7 +69,7 @@ extern uint32_t zfs_vdev_async_write_max_active; * Virtual device operations */ typedef int vdev_open_func_t(vdev_t *vd, uint64_t *size, uint64_t *max_size, - uint64_t *ashift); + uint64_t *ashift, uint64_t *pshift); typedef void vdev_close_func_t(vdev_t *vd); typedef uint64_t vdev_asize_func_t(vdev_t *vd, uint64_t psize); typedef void vdev_io_start_func_t(zio_t *zio); @@ -216,6 +216,25 @@ struct vdev { uint64_t vdev_min_asize; /* min acceptable asize */ uint64_t vdev_max_asize; /* max acceptable asize */ uint64_t vdev_ashift; /* block alignment shift */ + + /* + * Logical block alignment shift + * + * The smallest sized/aligned I/O supported by the device. + */ + uint64_t vdev_logical_ashift; + /* + * Physical block alignment shift + * + * The device supports logical I/Os with vdev_logical_ashift + * size/alignment, but optimum performance will be achieved by + * aligning/sizing requests to vdev_physical_ashift. Smaller + * requests may be inflated or incur device level read-modify-write + * operations. + * + * May be 0 to indicate no preference (i.e. use vdev_logical_ashift). + */ + uint64_t vdev_physical_ashift; uint64_t vdev_state; /* see VDEV_STATE_* #defines */ uint64_t vdev_prevstate; /* used when reopening a vdev */ vdev_ops_t *vdev_ops; /* vdev operations */ @@ -586,6 +605,14 @@ extern int vdev_obsolete_counts_are_precise(vdev_t *vd, boolean_t *are_precise); */ int vdev_checkpoint_sm_object(vdev_t *vd, uint64_t *sm_obj); +/* + * Vdev ashift optimization tunables + */ +extern uint64_t zfs_vdev_min_auto_ashift; +extern uint64_t zfs_vdev_max_auto_ashift; +int param_set_min_auto_ashift(ZFS_MODULE_PARAM_ARGS); +int param_set_max_auto_ashift(ZFS_MODULE_PARAM_ARGS); + #ifdef __cplusplus } #endif |