D25564.diff
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	Index: head/sys/dev/vt/vt_core.c
	===================================================================
	--- head/sys/dev/vt/vt_core.c
	+++ head/sys/dev/vt/vt_core.c
	@@ -454,7 +454,7 @@
	return (0);
	}

	-/* vt_late_window_switch will done VT switching for regular case. */
	+/* vt_late_window_switch will do VT switching for regular case. */
	static int
	vt_late_window_switch(struct vt_window *vw)
	{
	@@ -2326,12 +2326,11 @@
	case CONS_HISTORY:
	if ((int )data < 0)
	return EINVAL;
	- if ((int )data != vd->vd_curwindow->vw_buf.vb_history_size)
	- vtbuf_sethistory_size(&vd->vd_curwindow->vw_buf,
	- (int )data);
	+ if ((int )data != vw->vw_buf.vb_history_size)
	+ vtbuf_sethistory_size(&vw->vw_buf, (int )data);
	return (0);
	case CONS_CLRHIST:
	- vtbuf_clearhistory(&vd->vd_curwindow->vw_buf);
	+ vtbuf_clearhistory(&vw->vw_buf);
	/*
	* Invalidate the entire visible window; it is not guaranteed
	* that this operation will be immediately followed by a scroll
	@@ -2339,9 +2338,11 @@
	* to remain visible.
	*/
	VT_LOCK(vd);
	- vd->vd_flags \|= VDF_INVALID;
	+ if (vw == vd->vd_curwindow) {
	+ vd->vd_flags \|= VDF_INVALID;
	+ vt_resume_flush_timer(vw, 0);
	+ }
	VT_UNLOCK(vd);
	- vt_resume_flush_timer(vd->vd_curwindow, 0);
	return (0);
	case CONS_GET:
	/* XXX */