svn commit: r317390 - head/sys/netinet

[Navdeep Parhar]

Author: np
Date: Mon Apr 24 22:35:00 2017
New Revision: 317390
URL: https://svnweb.freebsd.org/changeset/base/317390

Log:
  Flush the LRO ctrl as soon as lro_mbufs fills up.  There is no need to
  wait for the next enqueue from the driver.
  
  Reviewed by:	gnn@, hselasky@, gallatin@
  MFC after:	1 week
  Sponsored by:	Chelsio Communications
  Differential Revision:	https://reviews.freebsd.org/D10432

Modified:
  head/sys/netinet/tcp_lro.c

Modified: head/sys/netinet/tcp_lro.c
==============================================================================
--- head/sys/netinet/tcp_lro.c	Mon Apr 24 22:31:56 2017	(r317389)
+++ head/sys/netinet/tcp_lro.c	Mon Apr 24 22:35:00 2017	(r317390)
@@ -959,10 +959,6 @@ tcp_lro_queue_mbuf(struct lro_ctrl *lc, 
 		return;
 	}
 
-	/* check if array is full */
-	if (__predict_false(lc->lro_mbuf_count == lc->lro_mbuf_max))
-		tcp_lro_flush_all(lc);
-
 	/* create sequence number */
 	lc->lro_mbuf_data[lc->lro_mbuf_count].seq =
 	    (((uint64_t)M_HASHTYPE_GET(mb)) << 56) |
@@ -970,7 +966,11 @@ tcp_lro_queue_mbuf(struct lro_ctrl *lc, 
 	    ((uint64_t)lc->lro_mbuf_count);
 
 	/* enter mbuf */
-	lc->lro_mbuf_data[lc->lro_mbuf_count++].mb = mb;
+	lc->lro_mbuf_data[lc->lro_mbuf_count].mb = mb;
+
+	/* flush if array is full */
+	if (__predict_false(++lc->lro_mbuf_count == lc->lro_mbuf_max))
+		tcp_lro_flush_all(lc);
 }
 
 /* end */