Evict meta data from ghost lists + l2arc headers

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

diff --git a/module/zfs/arc.c b/module/zfs/arc.c
index ce4a023..32ad80b 100644 (file)
--- a/module/zfs/arc.c
+++ b/module/zfs/arc.c
@@ -2104,8 +2104,9 @@ arc_do_user_evicts(void)
 void
 arc_adjust_meta(int64_t adjustment, boolean_t may_prune)
 {
-       int64_t delta;
+       int64_t delta, tmp = adjustment;
 
+       /* Evict MRU+MFU meta data to ghost lists */
        if (adjustment > 0 && arc_mru->arcs_lsize[ARC_BUFC_METADATA] > 0) {
                delta = MIN(arc_mru->arcs_lsize[ARC_BUFC_METADATA], adjustment);
                arc_evict(arc_mru, 0, delta, FALSE, ARC_BUFC_METADATA);
@@ -2115,9 +2116,24 @@ arc_adjust_meta(int64_t adjustment, boolean_t may_prune)
        if (adjustment > 0 && arc_mfu->arcs_lsize[ARC_BUFC_METADATA] > 0) {
                delta = MIN(arc_mfu->arcs_lsize[ARC_BUFC_METADATA], adjustment);
                arc_evict(arc_mfu, 0, delta, FALSE, ARC_BUFC_METADATA);
+       }
+
+       /* Evict ghost MRU+MFU meta data */
+       adjustment = tmp;
+
+       if (adjustment > 0 && arc_mru_ghost->arcs_size > 0) {
+               delta = MIN(arc_mru_ghost->arcs_size, adjustment);
+               arc_evict_ghost(arc_mru_ghost, 0, delta, ARC_BUFC_METADATA);
+               adjustment -= delta;
+       }
+
+       if (adjustment > 0 && arc_mfu_ghost->arcs_size > 0) {
+               delta = MIN(arc_mfu_ghost->arcs_size, adjustment);
+               arc_evict_ghost(arc_mfu_ghost, 0, delta, ARC_BUFC_METADATA);
                adjustment -= delta;
        }
 
+       /* Request the VFS release some meta data */
        if (may_prune && (adjustment > 0) && (arc_meta_used > arc_meta_limit))
                arc_do_user_prune(zfs_arc_meta_prune);
 }