Update ARC memory limits to account for SLUB internal fragmentation

[zfs.git] / module / zfs / arc.c

diff --git a/module/zfs/arc.c b/module/zfs/arc.c
index d6eaa6c..7aa23ca 100644 (file)
--- a/module/zfs/arc.c
+++ b/module/zfs/arc.c
@@ -3723,11 +3723,7 @@ arc_init(void)
 
        /* set min cache to 1/32 of all memory, or 64MB, whichever is more */
        arc_c_min = MAX(arc_c / 4, 64<<20);
-       /* set max to 1/2 of all memory, or all but 4GB, whichever is more */
-       if (arc_c * 8 >= ((uint64_t)4<<30))
-               arc_c_max = (arc_c * 8) - ((uint64_t)4<<30);
-       else
-               arc_c_max = arc_c_min;
+       /* set max to 1/2 of all memory */
        arc_c_max = MAX(arc_c * 4, arc_c_max);
 
        /*