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authorFaisal Latif <faisal.latif@intel.com>2009-04-28 00:39:36 +0400
committerRoland Dreier <rolandd@cisco.com>2009-04-28 00:39:36 +0400
commit4e9c390036196f89208cf9574dfd19daae146776 (patch)
treec6f80bd2fdebbbfe87ba6f1addf84ed0e6d1af58
parentc11470f9f4d4490cd7e9563f604c4c7868caf6de (diff)
downloadlinux-4e9c390036196f89208cf9574dfd19daae146776.tar.xz
RDMA/nes: Increase rexmit timeout interval
Under heavy load with large cluster testing, it may take longer to receive a response to MPA requests. Change the driver to wait longer after each rexmit to max time value. Signed-off-by: Faisal Latif <faisal.latif@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
-rw-r--r--drivers/infiniband/hw/nes/nes_cm.c6
-rw-r--r--drivers/infiniband/hw/nes/nes_cm.h1
2 files changed, 6 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/nes/nes_cm.c b/drivers/infiniband/hw/nes/nes_cm.c
index 1f7a659e6e9a..4969c386785e 100644
--- a/drivers/infiniband/hw/nes/nes_cm.c
+++ b/drivers/infiniband/hw/nes/nes_cm.c
@@ -541,6 +541,7 @@ static void nes_cm_timer_tick(unsigned long pass)
struct list_head *list_node;
struct nes_cm_core *cm_core = g_cm_core;
u32 settimer = 0;
+ unsigned long timetosend;
int ret = NETDEV_TX_OK;
struct list_head timer_list;
@@ -645,8 +646,11 @@ static void nes_cm_timer_tick(unsigned long pass)
send_entry->retrycount);
if (send_entry->send_retrans) {
send_entry->retranscount--;
+ timetosend = (NES_RETRY_TIMEOUT <<
+ (NES_DEFAULT_RETRANS - send_entry->retranscount));
+
send_entry->timetosend = jiffies +
- NES_RETRY_TIMEOUT;
+ min(timetosend, NES_MAX_TIMEOUT);
if (nexttimeout > send_entry->timetosend ||
!settimer) {
nexttimeout = send_entry->timetosend;
diff --git a/drivers/infiniband/hw/nes/nes_cm.h b/drivers/infiniband/hw/nes/nes_cm.h
index 80bba1892571..8b7e7c0e496e 100644
--- a/drivers/infiniband/hw/nes/nes_cm.h
+++ b/drivers/infiniband/hw/nes/nes_cm.h
@@ -149,6 +149,7 @@ struct nes_timer_entry {
#endif
#define NES_SHORT_TIME (10)
#define NES_LONG_TIME (2000*HZ/1000)
+#define NES_MAX_TIMEOUT ((unsigned long) (12*HZ))
#define NES_CM_HASHTABLE_SIZE 1024
#define NES_CM_TCP_TIMER_INTERVAL 3000