drbd: Four new configuration settings for resync speed control

To reasonably control resync speed over drbd-proxy connections,
drbd has to measure the current delay of packets transmitted over
the (possibly congested) data socket vs the meta-data socket.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 6cb7036..93d1506 100644 (file)
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1555,6 +1555,10 @@ static int drbd_nl_syncer_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *n
                sc.rate       = DRBD_RATE_DEF;
                sc.after      = DRBD_AFTER_DEF;
                sc.al_extents = DRBD_AL_EXTENTS_DEF;
+               sc.dp_volume  = DRBD_DP_VOLUME_DEF;
+               sc.dp_interval = DRBD_DP_INTERVAL_DEF;
+               sc.throttle_th = DRBD_RS_THROTTLE_TH_DEF;
+               sc.hold_off_th = DRBD_RS_HOLD_OFF_TH_DEF;
        } else
                memcpy(&sc, &mdev->sync_conf, sizeof(struct syncer_conf));
 

diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h
index 51f47a5..440b42e 100644 (file)
--- a/include/linux/drbd_limits.h
+++ b/include/linux/drbd_limits.h
@@ -133,5 +133,21 @@
 #define DRBD_MAX_BIO_BVECS_MAX 128
 #define DRBD_MAX_BIO_BVECS_DEF 0
 
+#define DRBD_DP_VOLUME_MIN 4
+#define DRBD_DP_VOLUME_MAX 1048576
+#define DRBD_DP_VOLUME_DEF 16384
+
+#define DRBD_DP_INTERVAL_MIN 1
+#define DRBD_DP_INTERVAL_MAX 600
+#define DRBD_DP_INTERVAL_DEF 5
+
+#define DRBD_RS_THROTTLE_TH_MIN 1
+#define DRBD_RS_THROTTLE_TH_MAX 600
+#define DRBD_RS_THROTTLE_TH_DEF 20
+
+#define DRBD_RS_HOLD_OFF_TH_MIN 1
+#define DRBD_RS_HOLD_OFF_TH_MAX 6000
+#define DRBD_RS_HOLD_OFF_TH_DEF 100
+
 #undef RANGE
 #endif

diff --git a/include/linux/drbd_nl.h b/include/linux/drbd_nl.h
index de055c0..ce77a74 100644 (file)
--- a/include/linux/drbd_nl.h
+++ b/include/linux/drbd_nl.h
@@ -78,6 +78,10 @@ NL_PACKET(syncer_conf, 8,
        NL_INTEGER(     30,     T_MAY_IGNORE,   rate)
        NL_INTEGER(     31,     T_MAY_IGNORE,   after)
        NL_INTEGER(     32,     T_MAY_IGNORE,   al_extents)
+       NL_INTEGER(     71,     T_MAY_IGNORE,   dp_volume)
+       NL_INTEGER(     72,     T_MAY_IGNORE,   dp_interval)
+       NL_INTEGER(     73,     T_MAY_IGNORE,   throttle_th)
+       NL_INTEGER(     74,     T_MAY_IGNORE,   hold_off_th)
        NL_STRING(      52,     T_MAY_IGNORE,   verify_alg,     SHARED_SECRET_MAX)
        NL_STRING(      51,     T_MAY_IGNORE,   cpu_mask,       32)
        NL_STRING(      64,     T_MAY_IGNORE,   csums_alg,      SHARED_SECRET_MAX)