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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Tue, 28 Apr 2015 08:20:24 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r282128 - head/sys/vm
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Author: kib
Date: Tue Apr 28 08:20:23 2015
New Revision: 282128
URL: https://svnweb.freebsd.org/changeset/base/282128

Log:
  Do not sleep waiting for the MAP_ENTRY_IN_TRANSITION state ending with
  the vnode locked.
  
  Review:	https://reviews.freebsd.org/D2381
  Submitted by:	Conrad Meyer, Attilio Rao
  MFC after:	1 week

Modified:
  head/sys/vm/vm_fault.c

Modified: head/sys/vm/vm_fault.c
==============================================================================
--- head/sys/vm/vm_fault.c	Tue Apr 28 08:04:16 2015	(r282127)
+++ head/sys/vm/vm_fault.c	Tue Apr 28 08:20:23 2015	(r282128)
@@ -348,6 +348,10 @@ RetryFault:;
 		vm_map_lock(fs.map);
 		if (vm_map_lookup_entry(fs.map, vaddr, &fs.entry) &&
 		    (fs.entry->eflags & MAP_ENTRY_IN_TRANSITION)) {
+			if (fs.vp != NULL) {
+				vput(fs.vp);
+				fs.vp = NULL;
+			}
 			fs.entry->eflags |= MAP_ENTRY_NEEDS_WAKEUP;
 			vm_map_unlock_and_wait(fs.map, 0);
 		} else