diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c
index b2a126a947e31e827d50da2ad53241f78bd6ea85..c0f1e7e7a88364954d49588096162a2ab0a6fe13 100644
--- a/fs/kernfs/mount.c
+++ b/fs/kernfs/mount.c
@@ -240,6 +240,9 @@ static int kernfs_fill_super(struct super_block *sb, unsigned long magic)
 		sb->s_export_op = &kernfs_export_ops;
 	sb->s_time_gran = 1;
 
+	/* sysfs dentries and inodes don't require IO to create */
+	sb->s_shrink.seeks = 0;
+
 	/* get root inode, initialize and unlock it */
 	mutex_lock(&kernfs_mutex);
 	inode = kernfs_get_inode(sb, info->root->kn);
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 31bf3bb8ddae055741761fc32786d9563e0250dd..93f83b2e85c7fa6e1b23e4963a60785078581e1d 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -516,6 +516,9 @@ int proc_fill_super(struct super_block *s, void *data, int silent)
 	 */
 	s->s_stack_depth = FILESYSTEM_MAX_STACK_DEPTH;
 	
+	/* procfs dentries and inodes don't require IO to create */
+	s->s_shrink.seeks = 0;
+
 	pde_get(&proc_root);
 	root_inode = proc_get_inode(s, &proc_root);
 	if (!root_inode) {
diff --git a/mm/vmscan.c b/mm/vmscan.c
index d30f18b2f0a871110b09adafe70d6e332d18fb6e..ffed599c57534618e124d474c1077645fcb6aa82 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -605,9 +605,18 @@ static unsigned long do_shrink_slab(struct shrink_control *shrinkctl,
 	nr = atomic_long_xchg(&shrinker->nr_deferred[nid], 0);
 
 	total_scan = nr;
-	delta = freeable >> priority;
-	delta *= 4;
-	do_div(delta, shrinker->seeks);
+	if (shrinker->seeks) {
+		delta = freeable >> priority;
+		delta *= 4;
+		do_div(delta, shrinker->seeks);
+	} else {
+		/*
+		 * These objects don't require any IO to create. Trim
+		 * them aggressively under memory pressure to keep
+		 * them from causing refetches in the IO caches.
+		 */
+		delta = freeable / 2;
+	}
 
 	total_scan += delta;
 	if (total_scan < 0) {
diff --git a/mm/workingset.c b/mm/workingset.c
index a2384a5851e808f062f7811ffa412558b94cf9e0..b51bf88f2482c22b148412e111560111bbefcc9a 100644
--- a/mm/workingset.c
+++ b/mm/workingset.c
@@ -590,7 +590,7 @@ static unsigned long scan_shadow_nodes(struct shrinker *shrinker,
 static struct shrinker workingset_shadow_shrinker = {
 	.count_objects = count_shadow_nodes,
 	.scan_objects = scan_shadow_nodes,
-	.seeks = DEFAULT_SEEKS,
+	.seeks = 0, /* ->count reports only fully expendable nodes */
 	.flags = SHRINKER_NUMA_AWARE | SHRINKER_MEMCG_AWARE,
 };