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| author | Lars Ellenberg | 2016-06-14 00:26:31 +0200 |
|---|---|---|
| committer | Jens Axboe | 2016-06-14 05:43:07 +0200 |
| commit | 9104d31a759fbade8505f38f92f4dde719957826 (patch) | |
| tree | ad71e3ed1cbb0a096fae43d8a48db469b8ff4761 /drivers/block/drbd/drbd_int.h | |
| parent | drbd: report sizes if rejecting too small peer disk (diff) | |
| download | kernel-qcow2-linux-9104d31a759fbade8505f38f92f4dde719957826.tar.gz kernel-qcow2-linux-9104d31a759fbade8505f38f92f4dde719957826.tar.xz kernel-qcow2-linux-9104d31a759fbade8505f38f92f4dde719957826.zip | |
drbd: introduce WRITE_SAME support
We will support WRITE_SAME, if
* all peers support WRITE_SAME (both in kernel and DRBD version),
* all peer devices support WRITE_SAME
* logical_block_size is identical on all peers.
We may at some point introduce a fallback on the receiving side
for devices/kernels that do not support WRITE_SAME,
by open-coding a submit loop. But not yet.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block/drbd/drbd_int.h')
| -rw-r--r-- | drivers/block/drbd/drbd_int.h | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index 5ee8da325825..995aa8d25660 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -468,6 +468,9 @@ enum { /* this is/was a write request */ __EE_WRITE, + /* this is/was a write same request */ + __EE_WRITE_SAME, + /* this originates from application on peer * (not some resync or verify or other DRBD internal request) */ __EE_APPLICATION, @@ -487,6 +490,7 @@ enum { #define EE_IN_INTERVAL_TREE (1<<__EE_IN_INTERVAL_TREE) #define EE_SUBMITTED (1<<__EE_SUBMITTED) #define EE_WRITE (1<<__EE_WRITE) +#define EE_WRITE_SAME (1<<__EE_WRITE_SAME) #define EE_APPLICATION (1<<__EE_APPLICATION) #define EE_RS_THIN_REQ (1<<__EE_RS_THIN_REQ) @@ -1350,8 +1354,8 @@ struct bm_extent { /* For now, don't allow more than half of what we can "activate" in one * activity log transaction to be discarded in one go. We may need to rework * drbd_al_begin_io() to allow for even larger discard ranges */ -#define DRBD_MAX_DISCARD_SIZE (AL_UPDATES_PER_TRANSACTION/2*AL_EXTENT_SIZE) -#define DRBD_MAX_DISCARD_SECTORS (DRBD_MAX_DISCARD_SIZE >> 9) +#define DRBD_MAX_BATCH_BIO_SIZE (AL_UPDATES_PER_TRANSACTION/2*AL_EXTENT_SIZE) +#define DRBD_MAX_BBIO_SECTORS (DRBD_MAX_BATCH_BIO_SIZE >> 9) extern int drbd_bm_init(struct drbd_device *device); extern int drbd_bm_resize(struct drbd_device *device, sector_t sectors, int set_new_bits); @@ -1488,7 +1492,8 @@ enum determine_dev_size { extern enum determine_dev_size drbd_determine_dev_size(struct drbd_device *, enum dds_flags, struct resize_parms *) __must_hold(local); extern void resync_after_online_grow(struct drbd_device *); -extern void drbd_reconsider_queue_parameters(struct drbd_device *device, struct drbd_backing_dev *bdev); +extern void drbd_reconsider_queue_parameters(struct drbd_device *device, + struct drbd_backing_dev *bdev, struct o_qlim *o); extern enum drbd_state_rv drbd_set_role(struct drbd_device *device, enum drbd_role new_role, int force); @@ -1569,7 +1574,7 @@ extern int drbd_submit_peer_request(struct drbd_device *, extern int drbd_free_peer_reqs(struct drbd_device *, struct list_head *); extern struct drbd_peer_request *drbd_alloc_peer_req(struct drbd_peer_device *, u64, sector_t, unsigned int, - bool, + unsigned int, gfp_t) __must_hold(local); extern void __drbd_free_peer_req(struct drbd_device *, struct drbd_peer_request *, int); |