Make graid3 fallback to malloc() when component request size is bigger

then maximal prepared UMA zone size. This fixes crash with MAXPHYS > 128K.

2 files changed, 15 insertions, 9 deletions

diff --git a/sys/geom/raid3/g_raid3.c b/sys/geom/raid3/g_raid3.c
index 1cbce257b59f..0feca0c84823 100644
--- a/sys/geom/raid3/g_raid3.c
+++ b/sys/geom/raid3/g_raid3.c
@@ -183,15 +183,17 @@ static void *
 g_raid3_alloc(struct g_raid3_softc *sc, size_t size, int flags)
 {
 	void *ptr;
+	enum g_raid3_zones zone;
 
-	if (g_raid3_use_malloc)
+	if (g_raid3_use_malloc ||
+	    (zone = g_raid3_zone(size)) == G_RAID3_NUM_ZONES)
 		ptr = malloc(size, M_RAID3, flags);
 	else {
-		ptr = uma_zalloc_arg(sc->sc_zones[g_raid3_zone(size)].sz_zone,
-		   &sc->sc_zones[g_raid3_zone(size)], flags);
-		sc->sc_zones[g_raid3_zone(size)].sz_requested++;
+		ptr = uma_zalloc_arg(sc->sc_zones[zone].sz_zone,
+		   &sc->sc_zones[zone], flags);
+		sc->sc_zones[zone].sz_requested++;
 		if (ptr == NULL)
-			sc->sc_zones[g_raid3_zone(size)].sz_failed++;
+			sc->sc_zones[zone].sz_failed++;
 	}
 	return (ptr);
 }
@@ -199,12 +201,14 @@ g_raid3_alloc(struct g_raid3_softc *sc, size_t size, int flags)
 static void
 g_raid3_free(struct g_raid3_softc *sc, void *ptr, size_t size)
 {
+	enum g_raid3_zones zone;
 
-	if (g_raid3_use_malloc)
+	if (g_raid3_use_malloc ||
+	    (zone = g_raid3_zone(size)) == G_RAID3_NUM_ZONES)
 		free(ptr, M_RAID3);
 	else {
-		uma_zfree_arg(sc->sc_zones[g_raid3_zone(size)].sz_zone,
-		    ptr, &sc->sc_zones[g_raid3_zone(size)]);
+		uma_zfree_arg(sc->sc_zones[zone].sz_zone,
+		    ptr, &sc->sc_zones[zone]);
 	}
 }
 
diff --git a/sys/geom/raid3/g_raid3.h b/sys/geom/raid3/g_raid3.h
index a37599999359..5daf16d2077b 100644
--- a/sys/geom/raid3/g_raid3.h
+++ b/sys/geom/raid3/g_raid3.h
@@ -183,7 +183,9 @@ enum g_raid3_zones {
 
 static __inline enum g_raid3_zones
 g_raid3_zone(size_t nbytes) {
-	if (nbytes > 16384)
+	if (nbytes > 65536)
+		return (G_RAID3_NUM_ZONES);
+	else if (nbytes > 16384)
 		return (G_RAID3_ZONE_64K);
 	else if (nbytes > 4096)
 		return (G_RAID3_ZONE_16K);