svn commit: r292060 - head/sys/netinet

[Michael Tuexen]

Author: tuexen
Date: Thu Dec 10 11:49:32 2015
New Revision: 292060
URL: https://svnweb.freebsd.org/changeset/base/292060

Log:
  Retire sctp_validate_no_locks().
  
  This routine checks that there are no locks held for an inp,
  without having any lock on the inp. This breaks if the inp
  goes away when it is called. This happens on stress tests
  on a RPi B+.
  
  MFC after:	3 days

Modified:
  head/sys/netinet/sctp_input.c
  head/sys/netinet/sctp_output.c
  head/sys/netinet/sctp_pcb.h

Modified: head/sys/netinet/sctp_input.c
==============================================================================
--- head/sys/netinet/sctp_input.c	Thu Dec 10 11:11:44 2015	(r292059)
+++ head/sys/netinet/sctp_input.c	Thu Dec 10 11:49:32 2015	(r292060)
@@ -5641,30 +5641,6 @@ next_chunk:
 }
 
 
-#ifdef INVARIANTS
-#ifdef __GNUC__
-__attribute__((noinline))
-#endif
-	void
-	     sctp_validate_no_locks(struct sctp_inpcb *inp)
-{
-	struct sctp_tcb *lstcb;
-
-	LIST_FOREACH(lstcb, &inp->sctp_asoc_list, sctp_tcblist) {
-		if (mtx_owned(&lstcb->tcb_mtx)) {
-			panic("Own lock on stcb at return from input");
-		}
-	}
-	if (mtx_owned(&inp->inp_create_mtx)) {
-		panic("Own create lock on inp");
-	}
-	if (mtx_owned(&inp->inp_mtx)) {
-		panic("Own inp lock on inp");
-	}
-}
-
-#endif
-
 /*
  * common input chunk processing (v4 and v6)
  */
@@ -6048,11 +6024,6 @@ out:
 		SCTP_INP_DECR_REF(inp_decr);
 		SCTP_INP_WUNLOCK(inp_decr);
 	}
-#ifdef INVARIANTS
-	if (inp != NULL) {
-		sctp_validate_no_locks(inp);
-	}
-#endif
 	return;
 }
 

Modified: head/sys/netinet/sctp_output.c
==============================================================================
--- head/sys/netinet/sctp_output.c	Thu Dec 10 11:11:44 2015	(r292059)
+++ head/sys/netinet/sctp_output.c	Thu Dec 10 11:49:32 2015	(r292060)
@@ -13538,13 +13538,6 @@ out_unlocked:
 		}
 	}
 #endif
-#ifdef INVARIANTS
-	if (inp) {
-		sctp_validate_no_locks(inp);
-	} else {
-		SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n");
-	}
-#endif
 	if (top) {
 		sctp_m_freem(top);
 	}

Modified: head/sys/netinet/sctp_pcb.h
==============================================================================
--- head/sys/netinet/sctp_pcb.h	Thu Dec 10 11:11:44 2015	(r292059)
+++ head/sys/netinet/sctp_pcb.h	Thu Dec 10 11:49:32 2015	(r292060)
@@ -654,11 +654,5 @@ void
 
 #endif
 
-#ifdef INVARIANTS
-void
-     sctp_validate_no_locks(struct sctp_inpcb *inp);
-
-#endif
-
 #endif				/* _KERNEL */
 #endif				/* !__sctp_pcb_h__ */