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drbd: Actually allow BIOs up to 128k (was 32k).

Browse source 
Now we have multiple BIOs per ee, packets with a 32 bit length field,
it gets time to use these goodies.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Philipp Reisner 2010-08-23 15:18:33 +02:00
parent 02918be227
commit d53733893d
4 changed files with 14 additions and 5 deletions
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6
drivers/block/drbd/drbd_int.h
View file

@ -1389,11 +1389,13 @@ struct bm_extent {
#endif
/* Sector shift value for the "hash" functions of tl_hash and ee_hash tables.
* With a value of 6 all IO in one 32K block make it to the same slot of the
* With a value of 8 all IO in one 128K block make it to the same slot of the
* hash table. */
#define HT_SHIFT 6
#define HT_SHIFT 8
#define DRBD_MAX_SEGMENT_SIZE (1U<<(9+HT_SHIFT))
#define DRBD_MAX_SIZE_H80_PACKET (1 << 15) /* The old header only allows packets up to 32Kib data */
/* Number of elements in the app_reads_hash */
#define APP_R_HSIZE 15

4
drivers/block/drbd/drbd_main.c
View file

@ -2447,7 +2447,7 @@ int drbd_send_dblock(struct drbd_conf *mdev, struct drbd_request *req)
dgs = (mdev->agreed_pro_version >= 87 && mdev->integrity_w_tfm) ?
crypto_hash_digestsize(mdev->integrity_w_tfm) : 0;
if (req->size <= (1 << 15)) {
if (req->size <= DRBD_MAX_SIZE_H80_PACKET) {
p.head.h80.magic = BE_DRBD_MAGIC;
p.head.h80.command = cpu_to_be16(P_DATA);
p.head.h80.length =
@ -2518,7 +2518,7 @@ int drbd_send_block(struct drbd_conf *mdev, enum drbd_packets cmd,
dgs = (mdev->agreed_pro_version >= 87 && mdev->integrity_w_tfm) ?
crypto_hash_digestsize(mdev->integrity_w_tfm) : 0;
if (e->size <= (1 << 15)) {
if (e->size <= DRBD_MAX_SIZE_H80_PACKET) {
p.head.h80.magic = BE_DRBD_MAGIC;
p.head.h80.command = cpu_to_be16(cmd);
p.head.h80.length =

4
drivers/block/drbd/drbd_nl.c
View file

@ -1063,7 +1063,9 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp
mdev->read_cnt = 0;
mdev->writ_cnt = 0;
drbd_setup_queue_param(mdev, DRBD_MAX_SEGMENT_SIZE);
drbd_setup_queue_param(mdev, mdev->state.conn == C_CONNECTED &&
mdev->agreed_pro_version < 95 ?
DRBD_MAX_SIZE_H80_PACKET : DRBD_MAX_SEGMENT_SIZE);
/* If I am currently not R_PRIMARY,
* but meta data primary indicator is set,

5
drivers/block/drbd/drbd_receiver.c
View file

@ -925,6 +925,11 @@ static int drbd_connect(struct drbd_conf *mdev)
drbd_thread_start(&mdev->asender);
if (mdev->agreed_pro_version < 95 && get_ldev(mdev)) {
drbd_setup_queue_param(mdev, DRBD_MAX_SIZE_H80_PACKET);
put_ldev(mdev);
}
if (!drbd_send_protocol(mdev))
return -1;
drbd_send_sync_param(mdev, &mdev->sync_conf);