--- /n/sources/plan9/sys/src/9k/port/fault.c	Mon Jun 22 18:18:15 2026
+++ /sys/src/9k/port/fault.c	Thu Jun 25 00:00:00 2026
@@ -153,6 +153,8 @@ fixfault(Segment *s, uintptr addr, int read, int dommuput)
 			*pg = new;
 			copypage(lkp, *pg);
 			putpage(lkp);
+			if(s->ref > 1)
+				procflushseg(s);
 		}
 		mmuphys = PPN((*pg)->pa) | PTEWRITE | PTEVALID;
 		(*pg)->modref = PG_MOD|PG_REF;