D8641.id.diff
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	Index: head/lib/libc/sys/mmap.2
	===================================================================
	--- head/lib/libc/sys/mmap.2
	+++ head/lib/libc/sys/mmap.2
	@@ -28,7 +28,7 @@
	.\" @(#)mmap.2 8.4 (Berkeley) 5/11/95
	.\" $FreeBSD$
	.\"
	-.Dd February 18, 2015
	+.Dd November 25, 2016
	.Dt MMAP 2
	.Os
	.Sh NAME
	@@ -189,6 +189,8 @@
	(every 30-60 seconds usually) which can create performance problems if you
	do not need that to occur (such as when you are using shared file-backed
	mmap regions for IPC purposes).
	+Dirty data will be flushed automatically when all mappings of an object are
	+removed and all descriptors referencing the object are closed.
	Note that VM/file system coherency is
	maintained whether you use
	.Dv MAP_NOSYNC
	Index: head/sys/kern/vfs_subr.c
	===================================================================
	--- head/sys/kern/vfs_subr.c
	+++ head/sys/kern/vfs_subr.c
	@@ -3002,7 +3002,7 @@
	obj = vp->v_object;
	if (obj != NULL && (obj->flags & OBJ_MIGHTBEDIRTY) != 0) {
	VM_OBJECT_WLOCK(obj);
	- vm_object_page_clean(obj, 0, 0, OBJPC_NOSYNC);
	+ vm_object_page_clean(obj, 0, 0, 0);
	VM_OBJECT_WUNLOCK(obj);
	}
	VOP_INACTIVE(vp, td);