.

wcfs/wcfs.go

@@ -1583,6 +1583,10 @@ func main() {
 		// TODO -> teach go-fuse to handle Init.MaxPages (Linux 4.20+).
 		MaxWrite:      2*1024*1024,
 
+		// OS cache that we populate with bigfile data is precious;
+		// we precisely propagate ZODB invalidations into file invalidations.
+		PreciseDataCacheControl: true,
+
 		DisableXAttrs: true,        // we don't use
 		Debug:         *debug,
 	}