Merge tag 'rxrpc-rewrite-20160930' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

David Howells says:

====================
rxrpc: More fixes and adjustments

This set of patches contains some more fixes and adjustments:

 (1) Actually display the retransmission indication previously added to the
     tx_data trace.

 (2) Switch to Congestion Avoidance mode properly at cwnd==ssthresh rather
     than relying on detection during an overshoot and correction.

 (3) Reduce ssthresh to the peer's declared receive window.

 (4) The offset field in rxrpc_skb_priv can be dispensed with and the error
     field is no longer used.  Get rid of them.

 (5) Keep the call timeouts as ktimes rather than jiffies to make it easier
     to deal with RTT-based timeout values in future.  Rounding to jiffies
     is still necessary when the system timer is set.

 (6) Fix the call timer handling to avoid retriggering of expired timeout
     actions.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 13 deletions

diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h
index 8ba8d76e856a..0383e5e9a0f3 100644
--- a/include/trace/events/rxrpc.h
+++ b/include/trace/events/rxrpc.h
@@ -280,11 +280,12 @@ TRACE_EVENT(rxrpc_tx_data,
 		    __entry->lose = lose;
 			   ),
 
-	    TP_printk("c=%p DATA %08x q=%08x fl=%02x%s",
+	    TP_printk("c=%p DATA %08x q=%08x fl=%02x%s%s",
 		      __entry->call,
 		      __entry->serial,
 		      __entry->seq,
 		      __entry->flags,
+		      __entry->retrans ? " *RETRANS*" : "",
 		      __entry->lose ? " *LOSE*" : "")
 	    );
 
@@ -452,17 +453,18 @@ TRACE_EVENT(rxrpc_rtt_rx,
 
 TRACE_EVENT(rxrpc_timer,
 	    TP_PROTO(struct rxrpc_call *call, enum rxrpc_timer_trace why,
-		     unsigned long now),
+		     ktime_t now, unsigned long now_j),
 
-	    TP_ARGS(call, why, now),
+	    TP_ARGS(call, why, now, now_j),
 
 	    TP_STRUCT__entry(
 		    __field(struct rxrpc_call *,		call		)
 		    __field(enum rxrpc_timer_trace,		why		)
-		    __field(unsigned long,			now		)
-		    __field(unsigned long,			expire_at	)
-		    __field(unsigned long,			ack_at		)
-		    __field(unsigned long,			resend_at	)
+		    __field_struct(ktime_t,			now		)
+		    __field_struct(ktime_t,			expire_at	)
+		    __field_struct(ktime_t,			ack_at		)
+		    __field_struct(ktime_t,			resend_at	)
+		    __field(unsigned long,			now_j		)
 		    __field(unsigned long,			timer		)
 			     ),
 
@@ -473,17 +475,17 @@ TRACE_EVENT(rxrpc_timer,
 		    __entry->expire_at	= call->expire_at;
 		    __entry->ack_at	= call->ack_at;
 		    __entry->resend_at	= call->resend_at;
+		    __entry->now_j	= now_j;
 		    __entry->timer	= call->timer.expires;
 			   ),
 
-	    TP_printk("c=%p %s now=%lx x=%ld a=%ld r=%ld t=%ld",
+	    TP_printk("c=%p %s x=%lld a=%lld r=%lld t=%ld",
 		      __entry->call,
 		      rxrpc_timer_traces[__entry->why],
-		      __entry->now,
-		      __entry->expire_at - __entry->now,
-		      __entry->ack_at - __entry->now,
-		      __entry->resend_at - __entry->now,
-		      __entry->timer - __entry->now)
+		      ktime_to_ns(ktime_sub(__entry->expire_at, __entry->now)),
+		      ktime_to_ns(ktime_sub(__entry->ack_at, __entry->now)),
+		      ktime_to_ns(ktime_sub(__entry->resend_at, __entry->now)),
+		      __entry->timer - __entry->now_j)
 	    );
 
 TRACE_EVENT(rxrpc_rx_lose,