Update bcachefs sources to cbccc6d869 bcachefs: Ratelimit ec error message

30 files changed, 254 insertions, 265 deletions

diff --git a/.bcachefs_revision b/.bcachefs_revision
index d5115b93..83d5a7db 100644
--- a/.bcachefs_revision
+++ b/.bcachefs_revision
@@ -1 +1 @@
-24c6361e202cc09de0159505eb3ab3ca265520d8
+cbccc6d8692fdd3af7d5db97a065af5a47bc733c
diff --git a/Makefile.compiler b/Makefile.compiler
index 86ecd2ac..94d0d40c 100644
--- a/Makefile.compiler
+++ b/Makefile.compiler
@@ -21,8 +21,8 @@ TMPOUT = $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_$$$$
 # automatically cleaned up.
 try-run = $(shell set -e;		\
 	TMP=$(TMPOUT)/tmp;		\
-	mkdir -p $(TMPOUT);		\
 	trap "rm -rf $(TMPOUT)" EXIT;	\
+	mkdir -p $(TMPOUT);		\
 	if ($(1)) >/dev/null 2>&1;	\
 	then echo "$(2)";		\
 	else echo "$(3)";		\
diff --git a/include/linux/kmemleak.h b/include/linux/kmemleak.h
index 34684b20..6a3cd1bf 100644
--- a/include/linux/kmemleak.h
+++ b/include/linux/kmemleak.h
@@ -29,10 +29,9 @@ extern void kmemleak_not_leak(const void *ptr) __ref;
 extern void kmemleak_ignore(const void *ptr) __ref;
 extern void kmemleak_scan_area(const void *ptr, size_t size, gfp_t gfp) __ref;
 extern void kmemleak_no_scan(const void *ptr) __ref;
-extern void kmemleak_alloc_phys(phys_addr_t phys, size_t size, int min_count,
+extern void kmemleak_alloc_phys(phys_addr_t phys, size_t size,
 				gfp_t gfp) __ref;
 extern void kmemleak_free_part_phys(phys_addr_t phys, size_t size) __ref;
-extern void kmemleak_not_leak_phys(phys_addr_t phys) __ref;
 extern void kmemleak_ignore_phys(phys_addr_t phys) __ref;
 
 static inline void kmemleak_alloc_recursive(const void *ptr, size_t size,
@@ -107,15 +106,12 @@ static inline void kmemleak_no_scan(const void *ptr)
 {
 }
 static inline void kmemleak_alloc_phys(phys_addr_t phys, size_t size,
-				       int min_count, gfp_t gfp)
+				       gfp_t gfp)
 {
 }
 static inline void kmemleak_free_part_phys(phys_addr_t phys, size_t size)
 {
 }
-static inline void kmemleak_not_leak_phys(phys_addr_t phys)
-{
-}
 static inline void kmemleak_ignore_phys(phys_addr_t phys)
 {
 }
diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h
index c7d32d80..ebbab7a6 100644
--- a/include/linux/shrinker.h
+++ b/include/linux/shrinker.h
@@ -24,7 +24,7 @@ struct shrinker {
 	struct list_head list;
 };
 
-int register_shrinker(struct shrinker *);
+int register_shrinker(struct shrinker *, const char *, ...);
 void unregister_shrinker(struct shrinker *);
 
 void run_shrinkers(gfp_t gfp_mask, bool);
diff --git a/libbcachefs/alloc_foreground.c b/libbcachefs/alloc_foreground.c
index ce365fec..e89999cf 100644
--- a/libbcachefs/alloc_foreground.c
+++ b/libbcachefs/alloc_foreground.c
@@ -688,7 +688,7 @@ static int bch2_bucket_alloc_set_trans(struct btree_trans *trans,
 		bch2_dev_alloc_list(c, stripe, devs_may_alloc);
 	unsigned dev;
 	struct bch_dev *ca;
-	int ret = 0;
+	int ret = -BCH_ERR_insufficient_devices;
 	unsigned i;
 
 	BUG_ON(*nr_effective >= nr_replicas);
@@ -718,8 +718,8 @@ static int bch2_bucket_alloc_set_trans(struct btree_trans *trans,
 			bch2_dev_stripe_increment(ca, stripe);
 		percpu_ref_put(&ca->ref);
 
-		ret = PTR_ERR_OR_ZERO(ob);
-		if (ret) {
+		if (IS_ERR(ob)) {
+			ret = PTR_ERR(ob);
 			if (bch2_err_matches(ret, BCH_ERR_transaction_restart) || cl)
 				break;
 			continue;
@@ -728,15 +728,12 @@ static int bch2_bucket_alloc_set_trans(struct btree_trans *trans,
 		add_new_bucket(c, ptrs, devs_may_alloc,
 			       nr_effective, have_cache, flags, ob);
 
-		if (*nr_effective >= nr_replicas)
+		if (*nr_effective >= nr_replicas) {
+			ret = 0;
 			break;
+		}
 	}
 
-	if (*nr_effective >= nr_replicas)
-		ret = 0;
-	else if (!ret)
-		ret = -BCH_ERR_insufficient_devices;
-
 	return ret;
 }
 
diff --git a/libbcachefs/backpointers.c b/libbcachefs/backpointers.c
index 955f3ee9..7e8b1301 100644
--- a/libbcachefs/backpointers.c
+++ b/libbcachefs/backpointers.c
@@ -29,10 +29,15 @@ static inline struct bpos bucket_pos_to_bp(const struct bch_fs *c,
 					   u64 bucket_offset)
 {
 	struct bch_dev *ca = bch_dev_bkey_exists(c, bucket.inode);
+	struct bpos ret;
 
-	return POS(bucket.inode,
-		   (bucket_to_sector(ca, bucket.offset) <<
-		    MAX_EXTENT_COMPRESS_RATIO_SHIFT) + bucket_offset);
+	ret = POS(bucket.inode,
+		  (bucket_to_sector(ca, bucket.offset) <<
+		   MAX_EXTENT_COMPRESS_RATIO_SHIFT) + bucket_offset);
+
+	BUG_ON(bpos_cmp(bucket, bp_pos_to_bucket(c, ret)));
+
+	return ret;
 }
 
 void bch2_extent_ptr_to_bp(struct bch_fs *c,
@@ -409,17 +414,20 @@ int bch2_get_next_backpointer(struct btree_trans *trans,
 			      struct bch_backpointer *dst)
 {
 	struct bch_fs *c = trans->c;
-	struct bpos bp_pos =
-		bucket_pos_to_bp(c, bucket,
-				max(*bp_offset, BACKPOINTER_OFFSET_MAX) - BACKPOINTER_OFFSET_MAX);
-	struct bpos bp_end_pos =
-		bucket_pos_to_bp(c, bpos_nosnap_successor(bucket), 0);
+	struct bpos bp_pos, bp_end_pos;
 	struct btree_iter alloc_iter, bp_iter = { NULL };
 	struct bkey_s_c k;
 	struct bkey_s_c_alloc_v4 a;
 	size_t i;
 	int ret;
 
+	if (*bp_offset == U64_MAX)
+		return 0;
+
+	bp_pos = bucket_pos_to_bp(c, bucket,
+				  max(*bp_offset, BACKPOINTER_OFFSET_MAX) - BACKPOINTER_OFFSET_MAX);
+	bp_end_pos = bucket_pos_to_bp(c, bpos_nosnap_successor(bucket), 0);
+
 	bch2_trans_iter_init(trans, &alloc_iter, BTREE_ID_alloc,
 			     bucket, BTREE_ITER_CACHED);
 	k = bch2_btree_iter_peek_slot(&alloc_iter);
@@ -803,8 +811,10 @@ int bch2_check_extents_to_backpointers(struct bch_fs *c)
 
 	bch2_trans_init(&trans, c, 0, 0);
 	for (btree_id = 0; btree_id < BTREE_ID_NR; btree_id++) {
+		unsigned depth = btree_type_has_ptrs(btree_id) ? 0 : 1;
+
 		bch2_trans_node_iter_init(&trans, &iter, btree_id, POS_MIN, 0,
-					  0,
+					  depth,
 					  BTREE_ITER_ALL_LEVELS|
 					  BTREE_ITER_PREFETCH);
 
diff --git a/libbcachefs/bcachefs_format.h b/libbcachefs/bcachefs_format.h
index 7b5fd726..9e10fc83 100644
--- a/libbcachefs/bcachefs_format.h
+++ b/libbcachefs/bcachefs_format.h
@@ -1412,7 +1412,7 @@ struct bch_sb_field_disk_groups {
 	x(trans_traverse_all,				71)	\
 	x(transaction_commit,				72)	\
 	x(write_super,					73)	\
-	x(trans_restart_would_deadlock_recursion_limit,	74)	\
+	x(trans_restart_would_deadlock_recursion_limit,	74)
 
 enum bch_persistent_counters {
 #define x(t, n, ...) BCH_COUNTER_##t,
diff --git a/libbcachefs/btree_cache.c b/libbcachefs/btree_cache.c
index 4d1fc39c..f84b5086 100644
--- a/libbcachefs/btree_cache.c
+++ b/libbcachefs/btree_cache.c
@@ -341,7 +341,7 @@ restart:
 			six_unlock_intent(&b->c.lock);
 
 			if (freed == nr)
-				goto out;
+				goto out_rotate;
 		} else if (trigger_writes &&
 			   btree_node_dirty(b) &&
 			   !btree_node_will_make_reachable(b) &&
@@ -360,6 +360,9 @@ restart:
 		if (touched >= nr)
 			break;
 	}
+out_rotate:
+	if (&t->list != &bc->live)
+		list_move_tail(&bc->live, &t->list);
 out:
 	mutex_unlock(&bc->lock);
 out_nounlock:
@@ -475,7 +478,7 @@ int bch2_fs_btree_cache_init(struct bch_fs *c)
 	bc->shrink.scan_objects		= bch2_btree_cache_scan;
 	bc->shrink.to_text		= bch2_btree_cache_shrinker_to_text;
 	bc->shrink.seeks		= 4;
-	ret = register_shrinker(&bc->shrink);
+	ret = register_shrinker(&bc->shrink, "%s/btree_cache", c->name);
 out:
 	pr_verbose_init(c->opts, "ret %i", ret);
 	return ret;
diff --git a/libbcachefs/btree_gc.c b/libbcachefs/btree_gc.c
index 5b7f7cd3..fd89165e 100644
--- a/libbcachefs/btree_gc.c
+++ b/libbcachefs/btree_gc.c
@@ -1966,7 +1966,7 @@ int bch2_gc_gens(struct bch_fs *c)
 	}
 
 	for (i = 0; i < BTREE_ID_NR; i++)
-		if ((1 << i) & BTREE_ID_HAS_PTRS) {
+		if (btree_type_has_ptrs(i)) {
 			struct btree_iter iter;
 			struct bkey_s_c k;
 
diff --git a/libbcachefs/btree_iter.c b/libbcachefs/btree_iter.c
index a7ff5df4..925ffb31 100644
--- a/libbcachefs/btree_iter.c
+++ b/libbcachefs/btree_iter.c
@@ -2834,16 +2834,18 @@ void __bch2_trans_init(struct btree_trans *trans, struct bch_fs *c, const char *
 
 	s = btree_trans_stats(trans);
 	if (s) {
-		unsigned expected_mem_bytes = s->max_mem;
+		unsigned expected_mem_bytes = roundup_pow_of_two(s->max_mem);
 
-		trans->mem_bytes = roundup_pow_of_two(expected_mem_bytes);
-		trans->mem = kmalloc(trans->mem_bytes, GFP_KERNEL|__GFP_NOFAIL);
-		trans->nr_max_paths = s->nr_max_paths;
+		trans->mem = kmalloc(expected_mem_bytes, GFP_KERNEL);
 
 		if (!unlikely(trans->mem)) {
 			trans->mem = mempool_alloc(&c->btree_trans_mem_pool, GFP_KERNEL);
 			trans->mem_bytes = BTREE_TRANS_MEM_MAX;
+		} else {
+			trans->mem_bytes = expected_mem_bytes;
 		}
+
+		trans->nr_max_paths = s->nr_max_paths;
 	}
 
 	trans->srcu_idx = srcu_read_lock(&c->btree_trans_barrier);
diff --git a/libbcachefs/btree_iter.h b/libbcachefs/btree_iter.h
index 4ec873aa..910f6d7b 100644
--- a/libbcachefs/btree_iter.h
+++ b/libbcachefs/btree_iter.h
@@ -171,6 +171,7 @@ void bch2_path_put(struct btree_trans *, struct btree_path *, bool);
 
 int bch2_trans_relock(struct btree_trans *);
 void bch2_trans_unlock(struct btree_trans *);
+bool bch2_trans_locked(struct btree_trans *);
 
 static inline bool trans_was_restarted(struct btree_trans *trans, u32 restart_count)
 {
diff --git a/libbcachefs/btree_key_cache.c b/libbcachefs/btree_key_cache.c
index 918dde31..35e94194 100644
--- a/libbcachefs/btree_key_cache.c
+++ b/libbcachefs/btree_key_cache.c
@@ -938,25 +938,26 @@ static void bch2_btree_key_cache_shrinker_to_text(struct printbuf *out, struct s
 	bch2_btree_key_cache_to_text(out, bc);
 }
 
-int bch2_fs_btree_key_cache_init(struct btree_key_cache *c)
+int bch2_fs_btree_key_cache_init(struct btree_key_cache *bc)
 {
+	struct bch_fs *c = container_of(bc, struct bch_fs, btree_key_cache);
 	int ret;
 
-	c->pcpu_freed = alloc_percpu(struct btree_key_cache_freelist);
-	if (!c->pcpu_freed)
+	bc->pcpu_freed = alloc_percpu(struct btree_key_cache_freelist);
+	if (!bc->pcpu_freed)
 		return -ENOMEM;
 
-	ret = rhashtable_init(&c->table, &bch2_btree_key_cache_params);
+	ret = rhashtable_init(&bc->table, &bch2_btree_key_cache_params);
 	if (ret)
 		return ret;
 
-	c->table_init_done = true;
+	bc->table_init_done = true;
 
-	c->shrink.seeks			= 1;
-	c->shrink.count_objects		= bch2_btree_key_cache_count;
-	c->shrink.scan_objects		= bch2_btree_key_cache_scan;
-	c->shrink.to_text		= bch2_btree_key_cache_shrinker_to_text;
-	return register_shrinker(&c->shrink);
+	bc->shrink.seeks		= 1;
+	bc->shrink.count_objects	= bch2_btree_key_cache_count;
+	bc->shrink.scan_objects		= bch2_btree_key_cache_scan;
+	bc->shrink.to_text		= bch2_btree_key_cache_shrinker_to_text;
+	return register_shrinker(&bc->shrink, "%s/btree_key_cache", c->name);
 }
 
 void bch2_btree_key_cache_to_text(struct printbuf *out, struct btree_key_cache *c)
diff --git a/libbcachefs/btree_locking.c b/libbcachefs/btree_locking.c
index 339d44ce..f4340086 100644
--- a/libbcachefs/btree_locking.c
+++ b/libbcachefs/btree_locking.c
@@ -71,11 +71,6 @@ struct lock_graph {
 	unsigned			nr;
 };
 
-static void lock_graph_pop(struct lock_graph *g)
-{
-	closure_put(&g->g[--g->nr].trans->ref);
-}
-
 static noinline void print_cycle(struct printbuf *out, struct lock_graph *g)
 {
 	struct trans_waiting_for_lock *i;
@@ -87,6 +82,18 @@ static noinline void print_cycle(struct printbuf *out, struct lock_graph *g)
 		bch2_btree_trans_to_text(out, i->trans);
 }
 
+static noinline void print_chain(struct printbuf *out, struct lock_graph *g)
+{
+	struct trans_waiting_for_lock *i;
+
+	for (i = g->g; i != g->g + g->nr; i++) {
+		if (i != g->g)
+			prt_str(out, "<- ");
+		prt_printf(out, "%u ", i->trans->locking_wait.task->pid);
+	}
+	prt_newline(out);
+}
+
 static int abort_lock(struct lock_graph *g, struct trans_waiting_for_lock *i)
 {
 	int ret;
@@ -134,6 +141,21 @@ static noinline int break_cycle(struct lock_graph *g)
 	BUG();
 }
 
+static void lock_graph_pop(struct lock_graph *g)
+{
+	closure_put(&g->g[--g->nr].trans->ref);
+}
+
+static void lock_graph_pop_above(struct lock_graph *g, struct trans_waiting_for_lock *above,
+				 struct printbuf *cycle)
+{
+	if (g->nr > 1 && cycle)
+		print_chain(cycle, g);
+
+	while (g->g + g->nr > above)
+		lock_graph_pop(g);
+}
+
 static int lock_graph_descend(struct lock_graph *g, struct btree_trans *trans,
 			      struct printbuf *cycle)
 {
@@ -142,11 +164,10 @@ static int lock_graph_descend(struct lock_graph *g, struct btree_trans *trans,
 	int ret = 0;
 
 	for (i = g->g; i < g->g + g->nr; i++) {
-		if (i->trans->locking != i->node_want)
-			while (g->g + g->nr >= i) {
-				lock_graph_pop(g);
-				return 0;
-			}
+		if (i->trans->locking != i->node_want) {
+			lock_graph_pop_above(g, i - 1, cycle);
+			return 0;
+		}
 
 		if (i->trans == trans) {
 			if (cycle) {
@@ -185,20 +206,19 @@ static int lock_graph_descend(struct lock_graph *g, struct btree_trans *trans,
 
 	return 0;
 deadlock:
-	while (g->nr)
-		lock_graph_pop(g);
+	lock_graph_pop_above(g, g->g, cycle);
 	return ret;
 }
 
-static noinline void lock_graph_remove_non_waiters(struct lock_graph *g)
+static noinline void lock_graph_remove_non_waiters(struct lock_graph *g,
+						   struct printbuf *cycle)
 {
 	struct trans_waiting_for_lock *i;
 
 	for (i = g->g + 1; i < g->g + g->nr; i++)
 		if (i->trans->locking != i->node_want ||
 		    i->trans->locking_wait.start_time != i[-1].lock_start_time) {
-			while (g->g + g->nr >= i)
-				lock_graph_pop(g);
+			lock_graph_pop_above(g, i - 1, cycle);
 			return;
 		}
 	BUG();
@@ -252,7 +272,7 @@ next:
 			b = &READ_ONCE(path->l[top->level].b)->c;
 
 			if (unlikely(IS_ERR_OR_NULL(b))) {
-				lock_graph_remove_non_waiters(&g);
+				lock_graph_remove_non_waiters(&g, cycle);
 				goto next;
 			}
 
@@ -286,6 +306,8 @@ next:
 		}
 	}
 
+	if (g.nr > 1 && cycle)
+		print_chain(cycle, &g);
 	lock_graph_pop(&g);
 	goto next;
 }
@@ -602,8 +624,18 @@ void bch2_trans_unlock(struct btree_trans *trans)
 	 * bch2_gc_btree_init_recurse() doesn't use btree iterators for walking
 	 * btree nodes, it implements its own walking:
 	 */
-	BUG_ON(!trans->is_initial_gc &&
-	       lock_class_is_held(&bch2_btree_node_lock_key));
+	EBUG_ON(!trans->is_initial_gc &&
+		lock_class_is_held(&bch2_btree_node_lock_key));
+}
+
+bool bch2_trans_locked(struct btree_trans *trans)
+{
+	struct btree_path *path;
+
+	trans_for_each_path(trans, path)
+		if (path->nodes_locked)
+			return true;
+	return false;
 }
 
 /* Debug */
diff --git a/libbcachefs/btree_locking.h b/libbcachefs/btree_locking.h
index 61d5038a..d91b42bf 100644
--- a/libbcachefs/btree_locking.h
+++ b/libbcachefs/btree_locking.h
@@ -194,6 +194,7 @@ static inline int __btree_node_lock_nopath(struct btree_trans *trans,
 					 bool lock_may_not_fail)
 {
 	int ret;
+
 	trans->lock_may_not_fail = lock_may_not_fail;
 	trans->lock_must_abort	= false;
 	trans->locking		= b;
diff --git a/libbcachefs/btree_update_interior.c b/libbcachefs/btree_update_interior.c
index cf9b9ec4..578ba747 100644
--- a/libbcachefs/btree_update_interior.c
+++ b/libbcachefs/btree_update_interior.c
@@ -36,6 +36,7 @@ static struct btree_path *get_unlocked_mut_path(struct btree_trans *trans,
 	struct btree_path *path;
 
 	path = bch2_path_get(trans, btree_id, pos, level + 1, level,
+			     BTREE_ITER_NOPRESERVE|
 			     BTREE_ITER_INTENT, _THIS_IP_);
 	path = bch2_btree_path_make_mut(trans, path, true, _THIS_IP_);
 	bch2_btree_path_downgrade(trans, path);
@@ -649,6 +650,17 @@ err:
 		 * we're in journal error state:
 		 */
 
+		/*
+		 * Ensure transaction is unlocked before using
+		 * btree_node_lock_nopath() (the use of which is always suspect,
+		 * we need to work on removing this in the future)
+		 *
+		 * It should be, but get_unlocked_mut_path() -> bch2_path_get()
+		 * calls bch2_path_upgrade(), before we call path_make_mut(), so
+		 * we may rarely end up with a locked path besides the one we
+		 * have here:
+		 */
+		bch2_trans_unlock(&trans);
 		btree_node_lock_nopath_nofail(&trans, &b->c, SIX_LOCK_intent);
 		mark_btree_node_locked(&trans, path, b->c.level, SIX_LOCK_intent);
 		bch2_btree_path_level_init(&trans, path, b);
diff --git a/libbcachefs/buckets.c b/libbcachefs/buckets.c
index 8af0dd02..de57e625 100644
--- a/libbcachefs/buckets.c
+++ b/libbcachefs/buckets.c
@@ -674,6 +674,10 @@ static int check_bucket_ref(struct bch_fs *c,
 	if (bucket_data_type == BCH_DATA_cached)
 		bucket_data_type = BCH_DATA_user;
 
+	if ((bucket_data_type == BCH_DATA_stripe && ptr_data_type == BCH_DATA_user) ||
+	    (bucket_data_type == BCH_DATA_user   && ptr_data_type == BCH_DATA_stripe))
+		bucket_data_type = ptr_data_type = BCH_DATA_stripe;
+
 	if (gen_after(ptr->gen, b_gen)) {
 		bch2_fsck_err(c, FSCK_CAN_IGNORE|FSCK_NEED_FSCK,
 			"bucket %u:%zu gen %u data type %s: ptr gen %u newer than bucket gen\n"
diff --git a/libbcachefs/data_update.c b/libbcachefs/data_update.c
index cb25efb6..3102166d 100644
--- a/libbcachefs/data_update.c
+++ b/libbcachefs/data_update.c
@@ -104,7 +104,6 @@ static int bch2_data_update_index_update(struct bch_write_op *op)
 	struct btree_iter iter;
 	struct data_update *m =
 		container_of(op, struct data_update, op);
-	struct open_bucket *ec_ob = ec_open_bucket(c, &op->open_buckets);
 	struct keylist *keys = &op->insert_keys;
 	struct bkey_buf _new, _insert;
 	int ret = 0;
@@ -232,9 +231,6 @@ static int bch2_data_update_index_update(struct bch_write_op *op)
 		if (!ret) {
 			bch2_btree_iter_set_pos(&iter, next_pos);
 
-			if (ec_ob)
-				bch2_ob_add_backpointer(c, ec_ob, &insert->k);
-
 			this_cpu_add(c->counters[BCH_COUNTER_move_extent_finish], new->k.size);
 			trace_move_extent_finish(&new->k);
 		}
diff --git a/libbcachefs/debug.c b/libbcachefs/debug.c
index bff5e9b6..1d2a1615 100644
--- a/libbcachefs/debug.c
+++ b/libbcachefs/debug.c
@@ -724,11 +724,18 @@ static ssize_t bch2_btree_deadlock_read(struct file *file, char __user *buf,
 		goto out;
 
 	mutex_lock(&c->btree_trans_lock);
-	list_for_each_entry(trans, &c->btree_trans_list, list)
-		if (bch2_check_for_deadlock(trans, &i->buf)) {
-			i->iter = 1;
-			break;
-		}
+	list_for_each_entry(trans, &c->btree_trans_list, list) {
+		if (trans->locking_wait.task->pid <= i->iter)
+			continue;
+
+		ret = flush_buf(i);
+		if (ret)
+			return ret;
+
+		bch2_check_for_deadlock(trans, &i->buf);
+
+		i->iter = trans->locking_wait.task->pid;
+	}
 	mutex_unlock(&c->btree_trans_lock);
 out:
 	if (i->buf.allocation_failure)
diff --git a/libbcachefs/disk_groups.c b/libbcachefs/disk_groups.c
index 19b44408..6b81f358 100644
--- a/libbcachefs/disk_groups.c
+++ b/libbcachefs/disk_groups.c
@@ -468,10 +468,7 @@ void bch2_opt_target_to_text(struct printbuf *out,
 				: NULL;
 
 			if (ca && percpu_ref_tryget(&ca->io_ref)) {
-				char b[BDEVNAME_SIZE];
-
-				prt_printf(out, "/dev/%s",
-				       bdevname(ca->disk_sb.bdev, b));
+				prt_printf(out, "/dev/%pg", ca->disk_sb.bdev);
 				percpu_ref_put(&ca->io_ref);
 			} else if (ca) {
 				prt_printf(out, "offline device %u", t.dev);
diff --git a/libbcachefs/ec.c b/libbcachefs/ec.c
index aa830114..f902da01 100644
--- a/libbcachefs/ec.c
+++ b/libbcachefs/ec.c
@@ -4,6 +4,7 @@
 
 #include "bcachefs.h"
 #include "alloc_foreground.h"
+#include "backpointers.h"
 #include "bkey_buf.h"
 #include "bset.h"
 #include "btree_gc.h"
@@ -820,17 +821,13 @@ static void extent_stripe_ptr_add(struct bkey_s_extent e,
 static int ec_stripe_update_extent(struct btree_trans *trans,
 				   struct btree_iter *iter,
 				   struct bkey_s_c k,
-				   struct ec_stripe_buf *s,
-				   struct bpos end)
+				   struct ec_stripe_buf *s)
 {
 	const struct bch_extent_ptr *ptr_c;
 	struct bch_extent_ptr *ptr, *ec_ptr = NULL;
 	struct bkey_i *n;
 	int ret, dev, block;
 
-	if (bkey_cmp(bkey_start_pos(k.k), end) >= 0)
-		return 1;
-
 	if (extent_has_stripe_ptr(k, s->key.k.p.offset))
 		return 0;
 
@@ -860,19 +857,72 @@ static int ec_stripe_update_extent(struct btree_trans *trans,
 	return bch2_trans_update(trans, iter, n, 0);
 }
 
-static int ec_stripe_update_extents(struct bch_fs *c,
-				 struct ec_stripe_buf *s,
-				 struct bkey *pos)
+static int ec_stripe_update_bucket(struct btree_trans *trans, struct ec_stripe_buf *s,
+				   unsigned block)
 {
+	struct bch_fs *c = trans->c;
+	struct bch_extent_ptr bucket = s->key.v.ptrs[block];
+	struct bpos bucket_pos = PTR_BUCKET_POS(c, &bucket);
+	struct bch_backpointer bp;
 	struct btree_iter iter;
 	struct bkey_s_c k;
+	u64 bp_offset = 0;
+	int ret = 0;
+retry:
+	while (1) {
+		bch2_trans_begin(trans);
+
+		ret = bch2_get_next_backpointer(trans, bucket_pos, bucket.gen, &bp_offset, &bp);
+		if (ret)
+			break;
+		if (bp_offset == U64_MAX)
+			break;
+
+		if (bch2_fs_inconsistent_on(bp.level, c, "found btree node in erasure coded bucket!?")) {
+			ret = -EIO;
+			break;
+		}
+
+		k = bch2_backpointer_get_key(trans, &iter, bucket_pos, bp_offset, bp);
+		ret = bkey_err(k);
+		if (ret)
+			break;
+		if (!k.k)
+			continue;
+
+		ret = ec_stripe_update_extent(trans, &iter, k, s);
+		bch2_trans_iter_exit(trans, &iter);
+		if (ret)
+			break;
+
+		bp_offset++;
+	}
+
+	if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
+		goto retry;
+
+	return ret;
+}
+
+static int ec_stripe_update_extents(struct bch_fs *c, struct ec_stripe_buf *s)
+{
+	struct btree_trans trans;
+	struct bch_stripe *v = &s->key.v;
+	unsigned i, nr_data = v->nr_blocks - v->nr_redundant;
+	int ret = 0;
+
+	bch2_trans_init(&trans, c, 0, 0);
+
+	for (i = 0; i < nr_data; i++) {
+		ret = ec_stripe_update_bucket(&trans, s, i);
+		if (ret)
+			break;
+	}
 
-	return bch2_trans_run(c,
-		for_each_btree_key_commit(&trans, iter,
-			BTREE_ID_extents, bkey_start_pos(pos),
-			BTREE_ITER_NOT_EXTENTS|BTREE_ITER_INTENT, k,
-			NULL, NULL, BTREE_INSERT_NOFAIL,
-		ec_stripe_update_extent(&trans, &iter, k, s, pos->p)));
+
+	bch2_trans_exit(&trans);
+
+	return ret;
 }
 
 /*
@@ -882,7 +932,6 @@ static void ec_stripe_create(struct ec_stripe_new *s)
 {
 	struct bch_fs *c = s->c;
 	struct open_bucket *ob;
-	struct bkey_i *k;
 	struct stripe *m;
 	struct bch_stripe *v = &s->new_stripe.key.v;
 	unsigned i, nr_data = v->nr_blocks - v->nr_redundant;
@@ -942,14 +991,10 @@ static void ec_stripe_create(struct ec_stripe_new *s)
 		goto err_put_writes;
 	}
 
-	for_each_keylist_key(&s->keys, k) {
-		ret = ec_stripe_update_extents(c, &s->new_stripe, &k->k);
-		if (ret) {
-			bch_err(c, "error creating stripe: error updating pointers: %s",
-				bch2_err_str(ret));
-			break;
-		}
-	}
+	ret = ec_stripe_update_extents(c, &s->new_stripe);
+	if (ret)
+		bch_err(c, "error creating stripe: error updating pointers: %s",
+			bch2_err_str(ret));
 
 	spin_lock(&c->ec_stripes_heap_lock);
 	m = genradix_ptr(&c->stripes, s->new_stripe.key.k.p.offset);
@@ -974,8 +1019,6 @@ err:
 			}
 		}
 
-	bch2_keylist_free(&s->keys, s->inline_keys);
-
 	ec_stripe_buf_exit(&s->existing_stripe);
 	ec_stripe_buf_exit(&s->new_stripe);
 	closure_debug_destroy(&s->iodone);
@@ -1058,30 +1101,6 @@ void *bch2_writepoint_ec_buf(struct bch_fs *c, struct write_point *wp)
 	return ob->ec->new_stripe.data[ob->ec_idx] + (offset << 9);
 }
 
-void bch2_ob_add_backpointer(struct bch_fs *c, struct open_bucket *ob,
-			     struct bkey *k)
-{
-	struct ec_stripe_new *ec = ob->ec;
-
-	if (!ec)
-		return;
-
-	mutex_lock(&ec->lock);
-
-	if (bch2_keylist_realloc(&ec->keys, ec->inline_keys,
-				 ARRAY_SIZE(ec->inline_keys),
-				 BKEY_U64s)) {
-		BUG();
-	}
-
-	bkey_init(&ec->keys.top->k);
-	ec->keys.top->k.p	= k->p;
-	ec->keys.top->k.size	= k->size;
-	bch2_keylist_push(&ec->keys);
-
-	mutex_unlock(&ec->lock);
-}
-
 static int unsigned_cmp(const void *_l, const void *_r)
 {
 	unsigned l = *((const unsigned *) _l);
@@ -1174,8 +1193,6 @@ static int ec_new_stripe_alloc(struct bch_fs *c, struct ec_stripe_head *h)
 				BCH_BKEY_PTRS_MAX) - h->redundancy;
 	s->nr_parity	= h->redundancy;
 
-	bch2_keylist_init(&s->keys, s->inline_keys);
-
 	ec_stripe_key_init(c, &s->new_stripe.key, s->nr_data,
 			   s->nr_parity, h->blocksize);
 
@@ -1438,7 +1455,7 @@ static int __bch2_ec_stripe_head_reserve(struct bch_fs *c,
 		 * This means we need to wait for copygc to
 		 * empty out buckets from existing stripes:
 		 */
-		bch_err(c, "failed to reserve stripe");
+		bch_err_ratelimited(c, "failed to reserve stripe: %s", bch2_err_str(ret));
 	}
 
 	return ret;
diff --git a/libbcachefs/ec.h b/libbcachefs/ec.h
index a4c13d61..3e2b22c0 100644
--- a/libbcachefs/ec.h
+++ b/libbcachefs/ec.h
@@ -4,7 +4,6 @@
 
 #include "ec_types.h"
 #include "buckets_types.h"
-#include "keylist_types.h"
 
 int bch2_stripe_invalid(const struct bch_fs *, struct bkey_s_c,
 			int rw, struct printbuf *);
@@ -166,9 +165,6 @@ struct ec_stripe_new {
 	open_bucket_idx_t	blocks[BCH_BKEY_PTRS_MAX];
 	struct disk_reservation	res;
 
-	struct keylist		keys;
-	u64			inline_keys[BKEY_U64s * 8];
-
 	struct ec_stripe_buf	new_stripe;
 	struct ec_stripe_buf	existing_stripe;
 };
@@ -196,8 +192,6 @@ struct ec_stripe_head {
 int bch2_ec_read_extent(struct bch_fs *, struct bch_read_bio *);
 
 void *bch2_writepoint_ec_buf(struct bch_fs *, struct write_point *);
-void bch2_ob_add_backpointer(struct bch_fs *, struct open_bucket *,
-			     struct bkey *);
 
 void bch2_ec_bucket_written(struct bch_fs *, struct open_bucket *);
 void bch2_ec_bucket_cancel(struct bch_fs *, struct open_bucket *);
diff --git a/libbcachefs/error.c b/libbcachefs/error.c
index 762abdf2..2fb5102e 100644
--- a/libbcachefs/error.c
+++ b/libbcachefs/error.c
@@ -104,7 +104,7 @@ int bch2_fsck_err(struct bch_fs *c, unsigned flags, const char *fmt, ...)
 {
 	struct fsck_err_state *s = NULL;
 	va_list args;
-	bool print = true, suppressing = false;
+	bool print = true, suppressing = false, inconsistent = false;
 	struct printbuf buf = PRINTBUF, *out = &buf;
 	int ret = -BCH_ERR_fsck_ignore;
 
@@ -136,7 +136,7 @@ int bch2_fsck_err(struct bch_fs *c, unsigned flags, const char *fmt, ...)
 		if (c->opts.errors != BCH_ON_ERROR_continue ||
 		    !(flags & (FSCK_CAN_FIX|FSCK_CAN_IGNORE))) {
 			prt_str(out, ", shutting down");
-			bch2_inconsistent_error(c);
+			inconsistent = true;
 			ret = -BCH_ERR_fsck_errors_not_fixed;
 		} else if (flags & FSCK_CAN_FIX) {
 			prt_str(out, ", fixing");
@@ -189,6 +189,9 @@ int bch2_fsck_err(struct bch_fs *c, unsigned flags, const char *fmt, ...)
 
 	printbuf_exit(&buf);
 
+	if (inconsistent)
+		bch2_inconsistent_error(c);
+
 	if (ret == -BCH_ERR_fsck_fix) {
 		set_bit(BCH_FS_ERRORS_FIXED, &c->flags);
 	} else {
diff --git a/libbcachefs/fs-io.c b/libbcachefs/fs-io.c
index 95b84c3c..7d45f486 100644
--- a/libbcachefs/fs-io.c
+++ b/libbcachefs/fs-io.c
@@ -434,22 +434,20 @@ static void mark_pagecache_unallocated(struct bch_inode_info *inode,
 {
 	pgoff_t index = start >> PAGE_SECTORS_SHIFT;
 	pgoff_t end_index = (end - 1) >> PAGE_SECTORS_SHIFT;
-	struct pagevec pvec;
+	struct folio_batch fbatch;
+	unsigned i, j;
 
 	if (end <= start)
 		return;
 
-	pagevec_init(&pvec);
+	folio_batch_init(&fbatch);
 
-	do {
-		unsigned nr_pages, i, j;
-
-		nr_pages = pagevec_lookup_range(&pvec, inode->v.i_mapping,
-						&index, end_index);
-		for (i = 0; i < nr_pages; i++) {
-			struct page *page = pvec.pages[i];
-			u64 pg_start = page->index << PAGE_SECTORS_SHIFT;
-			u64 pg_end = (page->index + 1) << PAGE_SECTORS_SHIFT;
+	while (filemap_get_folios(inode->v.i_mapping,
+				  &index, end_index, &fbatch)) {
+		for (i = 0; i < folio_batch_count(&fbatch); i++) {
+			struct folio *folio = fbatch.folios[i];
+			u64 pg_start = folio->index << PAGE_SECTORS_SHIFT;
+			u64 pg_end = (folio->index + 1) << PAGE_SECTORS_SHIFT;
 			unsigned pg_offset = max(start, pg_start) - pg_start;
 			unsigned pg_len = min(end, pg_end) - pg_offset - pg_start;
 			struct bch_page_state *s;
@@ -458,8 +456,8 @@ static void mark_pagecache_unallocated(struct bch_inode_info *inode,
 			BUG_ON(pg_offset >= PAGE_SECTORS);
 			BUG_ON(pg_offset + pg_len > PAGE_SECTORS);
 
-			lock_page(page);
-			s = bch2_page_state(page);
+			folio_lock(folio);
+			s = bch2_page_state(&folio->page);
 
 			if (s) {
 				spin_lock(&s->lock);
@@ -468,10 +466,11 @@ static void mark_pagecache_unallocated(struct bch_inode_info *inode,
 				spin_unlock(&s->lock);
 			}
 
-			unlock_page(page);
+			folio_unlock(folio);
 		}
-		pagevec_release(&pvec);
-	} while (index <= end_index);
+		folio_batch_release(&fbatch);
+		cond_resched();
+	}
 }
 
 static void mark_pagecache_reserved(struct bch_inode_info *inode,
@@ -480,23 +479,21 @@ static void mark_pagecache_reserved(struct bch_inode_info *inode,
 	struct bch_fs *c = inode->v.i_sb->s_fs_info;
 	pgoff_t index = start >> PAGE_SECTORS_SHIFT;
 	pgoff_t end_index = (end - 1) >> PAGE_SECTORS_SHIFT;
-	struct pagevec pvec;
+	struct folio_batch fbatch;
 	s64 i_sectors_delta = 0;
+	unsigned i, j;
 
 	if (end <= start)
 		return;
 
-	pagevec_init(&pvec);
+	folio_batch_init(&fbatch);
 
-	do {
-		unsigned nr_pages, i, j;
-
-		nr_pages = pagevec_lookup_range(&pvec, inode->v.i_mapping,
-						&index, end_index);
-		for (i = 0; i < nr_pages; i++) {
-			struct page *page = pvec.pages[i];
-			u64 pg_start = page->index << PAGE_SECTORS_SHIFT;
-			u64 pg_end = (page->index + 1) << PAGE_SECTORS_SHIFT;
+	while (filemap_get_folios(inode->v.i_mapping,
+				  &index, end_index, &fbatch)) {
+		for (i = 0; i < folio_batch_count(&fbatch); i++) {
+			struct folio *folio = fbatch.folios[i];
+			u64 pg_start = folio->index << PAGE_SECTORS_SHIFT;
+			u64 pg_end = (folio->index + 1) << PAGE_SECTORS_SHIFT;
 			unsigned pg_offset = max(start, pg_start) - pg_start;
 			unsigned pg_len = min(end, pg_end) - pg_offset - pg_start;
 			struct bch_page_state *s;
@@ -505,8 +502,8 @@ static void mark_pagecache_reserved(struct bch_inode_info *inode,
 			BUG_ON(pg_offset >= PAGE_SECTORS);
 			BUG_ON(pg_offset + pg_len > PAGE_SECTORS);
 
-			lock_page(page);
-			s = bch2_page_state(page);
+			folio_lock(folio);
+			s = bch2_page_state(&folio->page);
 
 			if (s) {
 				spin_lock(&s->lock);
@@ -525,10 +522,11 @@ static void mark_pagecache_reserved(struct bch_inode_info *inode,
 				spin_unlock(&s->lock);
 			}
 
-			unlock_page(page);
+			folio_unlock(folio);
 		}
-		pagevec_release(&pvec);
-	} while (index <= end_index);
+		folio_batch_release(&fbatch);
+		cond_resched();
+	}
 
 	i_sectors_acct(c, inode, NULL, i_sectors_delta);
 }
@@ -859,30 +857,6 @@ bool bch2_release_folio(struct folio *folio, gfp_t gfp_mask)
 	return true;
 }
 
-#ifdef CONFIG_MIGRATION
-int bch2_migrate_page(struct address_space *mapping, struct page *newpage,
-		      struct page *page, enum migrate_mode mode)
-{
-	int ret;
-
-	EBUG_ON(!PageLocked(page));
-	EBUG_ON(!PageLocked(newpage));
-
-	ret = migrate_page_move_mapping(mapping, newpage, page, 0);
-	if (ret != MIGRATEPAGE_SUCCESS)
-		return ret;
-
-	if (PagePrivate(page))
-		attach_page_private(newpage, detach_page_private(page));
-
-	if (mode != MIGRATE_SYNC_NO_COPY)
-		migrate_page_copy(newpage, page);
-	else
-		migrate_page_states(newpage, page);
-	return MIGRATEPAGE_SUCCESS;
-}
-#endif
-
 /* readpage(s): */
 
 static void bch2_readpages_end_io(struct bio *bio)
@@ -3224,58 +3198,6 @@ err:
 
 /* fseek: */
 
-static int page_data_offset(struct page *page, unsigned offset)
-{
-	struct bch_page_state *s = bch2_page_state(page);
-	unsigned i;
-
-	if (s)
-		for (i = offset >> 9; i < PAGE_SECTORS; i++)
-			if (s->s[i].state >= SECTOR_DIRTY)
-				return i << 9;
-
-	return -1;
-}
-
-static loff_t bch2_seek_pagecache_data(struct inode *vinode,
-				       loff_t start_offset,
-				       loff_t end_offset)
-{
-	struct address_space *mapping = vinode->i_mapping;
-	struct page *page;
-	pgoff_t start_index	= start_offset >> PAGE_SHIFT;
-	pgoff_t end_index	= end_offset >> PAGE_SHIFT;
-	pgoff_t index		= start_index;
-	loff_t ret;
-	int offset;
-
-	while (index <= end_index) {
-		if (find_get_pages_range(mapping, &index, end_index, 1, &page)) {
-			lock_page(page);
-
-			offset = page_data_offset(page,
-					page->index == start_index
-					? start_offset & (PAGE_SIZE - 1)
-					: 0);
-			if (offset >= 0) {
-				ret = clamp(((loff_t) page->index << PAGE_SHIFT) +
-					    offset,
-					    start_offset, end_offset);
-				unlock_page(page);
-				put_page(page);
-				return ret;
-			}
-
-			unlock_page(page);
-			put_page(page);
-		} else {
-			break;
-		}
-	}
-
-	return end_offset;
-}
-
 static loff_t bch2_seek_data(struct file *file, u64 offset)
 {
 	struct bch_inode_info *inode = file_bch_inode(file);
@@ -3319,9 +3241,13 @@ err:
 	if (ret)
 		return ret;
 
-	if (next_data > offset)
-		next_data = bch2_seek_pagecache_data(&inode->v,
-						     offset, next_data);
+	if (next_data > offset) {
+		loff_t pagecache_next_data =
+			mapping_seek_hole_data(inode->v.i_mapping, offset,
+					       next_data, SEEK_DATA);
+		if (pagecache_next_data >= 0)
+			next_data = min_t(u64, next_data, pagecache_next_data);
+	}
 
 	if (next_data >= isize)
 		return -ENXIO;
diff --git a/libbcachefs/fs-io.h b/libbcachefs/fs-io.h
index a22a4e95..a8835298 100644
--- a/libbcachefs/fs-io.h
+++ b/libbcachefs/fs-io.h
@@ -43,8 +43,6 @@ vm_fault_t bch2_page_fault(struct vm_fault *);
 vm_fault_t bch2_page_mkwrite(struct vm_fault *);
 void bch2_invalidate_folio(struct folio *, size_t, size_t);
 bool bch2_release_folio(struct folio *, gfp_t);
-int bch2_migrate_page(struct address_space *, struct page *,
-		      struct page *, enum migrate_mode);
 
 void bch2_fs_fsio_exit(struct bch_fs *);
 int bch2_fs_fsio_init(struct bch_fs *);
diff --git a/libbcachefs/fs.c b/libbcachefs/fs.c
index b5977c46..57e6e218 100644
--- a/libbcachefs/fs.c
+++ b/libbcachefs/fs.c
@@ -1123,7 +1123,7 @@ static const struct address_space_operations bch_address_space_operations = {
 	.release_folio	= bch2_release_folio,
 	.direct_IO	= noop_direct_IO,
 #ifdef CONFIG_MIGRATION
-	.migratepage	= bch2_migrate_page,
+	.migrate_folio	= filemap_migrate_folio,
 #endif
 	.error_remove_page = generic_error_remove_page,
 };
diff --git a/libbcachefs/io.c b/libbcachefs/io.c
index e047ef28..558d0c23 100644
--- a/libbcachefs/io.c
+++ b/libbcachefs/io.c
@@ -395,7 +395,6 @@ int bch2_write_index_default(struct bch_write_op *op)
 {
 	struct bch_fs *c = op->c;
 	struct bkey_buf sk;
-	struct open_bucket *ec_ob = ec_open_bucket(c, &op->open_buckets);
 	struct keylist *keys = &op->insert_keys;
 	struct bkey_i *k = bch2_keylist_front(keys);
 	struct btree_trans trans;
@@ -439,9 +438,6 @@ int bch2_write_index_default(struct bch_write_op *op)
 		if (ret)
 			break;
 
-		if (ec_ob)
-			bch2_ob_add_backpointer(c, ec_ob, &sk.k->k);
-
 		if (bkey_cmp(iter.pos, k->k.p) >= 0)
 			bch2_keylist_pop_front(&op->insert_keys);
 		else
diff --git a/libbcachefs/super-io.c b/libbcachefs/super-io.c
index d34aa6b6..cbc5979a 100644
--- a/libbcachefs/super-io.c
+++ b/libbcachefs/super-io.c
@@ -128,10 +128,8 @@ int bch2_sb_realloc(struct bch_sb_handle *sb, unsigned u64s)
 		u64 max_bytes = 512 << sb->sb->layout.sb_max_size_bits;
 
 		if (new_bytes > max_bytes) {
-			char buf[BDEVNAME_SIZE];
-
-			pr_err("%s: superblock too big: want %zu but have %llu",
-			       bdevname(sb->bdev, buf), new_bytes, max_bytes);
+			pr_err("%pg: superblock too big: want %zu but have %llu",
+			       sb->bdev, new_bytes, max_bytes);
 			return -BCH_ERR_ENOSPC_sb;
 		}
 	}
diff --git a/libbcachefs/super.c b/libbcachefs/super.c
index b1809f8c..a824e160 100644
--- a/libbcachefs/super.c
+++ b/libbcachefs/super.c
@@ -1224,8 +1224,8 @@ static int bch2_dev_attach_bdev(struct bch_fs *c, struct bch_sb_handle *sb)
 	bch2_dev_sysfs_online(c, ca);
 
 	if (c->sb.nr_devices == 1)
-		bdevname(ca->disk_sb.bdev, c->name);
-	bdevname(ca->disk_sb.bdev, ca->name);
+		snprintf(c->name, sizeof(c->name), "%pg", ca->disk_sb.bdev);
+	snprintf(ca->name, sizeof(ca->name), "%pg", ca->disk_sb.bdev);
 
 	rebalance_wakeup(c);
 	return 0;
@@ -1867,9 +1867,7 @@ struct bch_fs *bch2_fs_open(char * const *devices, unsigned nr_devices,
 	while (i < nr_devices) {
 		if (i != best_sb &&
 		    !bch2_dev_exists(sb[best_sb].sb, mi, sb[i].sb->dev_idx)) {
-			char buf[BDEVNAME_SIZE];
-			pr_info("%s has been removed, skipping",
-				bdevname(sb[i].bdev, buf));
+			pr_info("%pg has been removed, skipping", sb[i].bdev);
 			bch2_free_super(&sb[i]);
 			array_remove_item(sb, nr_devices, i);
 			continue;
diff --git a/libbcachefs/sysfs.c b/libbcachefs/sysfs.c
index f1b0f001..103fde97 100644
--- a/libbcachefs/sysfs.c
+++ b/libbcachefs/sysfs.c
@@ -298,7 +298,7 @@ static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c
 	bch2_trans_init(&trans, c, 0, 0);
 
 	for (id = 0; id < BTREE_ID_NR; id++) {
-		if (!((1U << id) & BTREE_ID_HAS_PTRS))
+		if (!btree_type_has_ptrs(id))
 			continue;
 
 		for_each_btree_key(&trans, iter, id, POS_MIN,
diff --git a/linux/shrinker.c b/linux/shrinker.c
index 876c1bae..13f0c4b9 100644
--- a/linux/shrinker.c
+++ b/linux/shrinker.c
@@ -10,7 +10,7 @@
 static LIST_HEAD(shrinker_list);
 static DEFINE_MUTEX(shrinker_lock);
 
-int register_shrinker(struct shrinker *shrinker)
+int register_shrinker(struct shrinker *shrinker, const char *fmt, ...)
 {
 	mutex_lock(&shrinker_lock);
 	list_add_tail(&shrinker->list, &shrinker_list);