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Date:      Tue, 13 Nov 2018 17:43:16 +0000 (UTC)
From:      Mark Johnston <markj@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org
Subject:   svn commit: r340398 - stable/12/sys/vm
Message-ID:  <201811131743.wADHhGDR002426@repo.freebsd.org>

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Author: markj
Date: Tue Nov 13 17:43:16 2018
New Revision: 340398
URL: https://svnweb.freebsd.org/changeset/base/340398

Log:
  MFC r340331:
  Re-apply r336984, reverting r339934.
  
  Approved by:	re (gjb)

Modified:
  stable/12/sys/vm/vm_object.c
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/sys/vm/vm_object.c
==============================================================================
--- stable/12/sys/vm/vm_object.c	Tue Nov 13 17:25:34 2018	(r340397)
+++ stable/12/sys/vm/vm_object.c	Tue Nov 13 17:43:16 2018	(r340398)
@@ -2143,8 +2143,9 @@ vm_object_coalesce(vm_object_t prev_object, vm_ooffset
 	next_size >>= PAGE_SHIFT;
 	next_pindex = OFF_TO_IDX(prev_offset) + prev_size;
 
-	if ((prev_object->ref_count > 1) &&
-	    (prev_object->size != next_pindex)) {
+	if (prev_object->ref_count > 1 &&
+	    prev_object->size != next_pindex &&
+	    (prev_object->flags & OBJ_ONEMAPPING) == 0) {
 		VM_OBJECT_WUNLOCK(prev_object);
 		return (FALSE);
 	}



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