bcachefs: Fix double counting when gc is running

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/btree_update_interior.c

@@ -1088,8 +1088,7 @@ static void bch2_btree_set_root_inmem(struct btree_update *as, struct btree *b)
 		bch2_btree_node_free_index(as, NULL,
 					   bkey_i_to_s_c(&old->key),
 					   fs_usage);
-	bch2_fs_usage_apply(c, fs_usage, &as->reserve->disk_res,
-			    gc_pos_btree_root(b->btree_id));
+	bch2_fs_usage_apply(c, fs_usage, &as->reserve->disk_res);
 
 	preempt_enable();
 	percpu_up_read(&c->mark_lock);
@@ -1192,8 +1191,7 @@ static void bch2_insert_fixup_btree_ptr(struct btree_update *as, struct btree *b
 					   bkey_disassemble(b, k, &tmp),
 					   fs_usage);
 
-	bch2_fs_usage_apply(c, fs_usage, &as->reserve->disk_res,
-			    gc_pos_btree_node(b));
+	bch2_fs_usage_apply(c, fs_usage, &as->reserve->disk_res);
 
 	preempt_enable();
 	percpu_up_read(&c->mark_lock);
@@ -1993,8 +1991,7 @@ static void __bch2_btree_node_update_key(struct bch_fs *c,
 		bch2_btree_node_free_index(as, NULL,
 					   bkey_i_to_s_c(&b->key),
 					   fs_usage);
-		bch2_fs_usage_apply(c, fs_usage, &as->reserve->disk_res,
-				    gc_pos_btree_root(b->btree_id));
+		bch2_fs_usage_apply(c, fs_usage, &as->reserve->disk_res);
 
 		percpu_up_read(&c->mark_lock);
 		mutex_unlock(&c->btree_interior_update_lock);

fs/bcachefs/buckets.c

@@ -255,8 +255,7 @@ static bool bucket_became_unavailable(struct bucket_mark old,
 
 int bch2_fs_usage_apply(struct bch_fs *c,
 			struct bch_fs_usage *fs_usage,
-			struct disk_reservation *disk_res,
-			struct gc_pos gc_pos)
+			struct disk_reservation *disk_res)
 {
 	s64 added = fs_usage->s.data + fs_usage->s.reserved;
 	s64 should_not_have_added;
@@ -285,13 +284,6 @@ int bch2_fs_usage_apply(struct bch_fs *c,
 	acc_u64s((u64 *) this_cpu_ptr(c->usage[0]),
 		 (u64 *) fs_usage,
 		 sizeof(*fs_usage) / sizeof(u64) + c->replicas.nr);
-
-	if (gc_visited(c, gc_pos)) {
-		BUG_ON(!c->usage[1]);
-		acc_u64s((u64 *) this_cpu_ptr(c->usage[1]),
-			 (u64 *) fs_usage,
-			 sizeof(*fs_usage) / sizeof(u64) + c->replicas.nr);
-	}
 	preempt_enable();
 
 	return ret;
@@ -1001,7 +993,7 @@ void bch2_mark_update(struct btree_insert *trans,
 		bch2_btree_node_iter_advance(&node_iter, b);
 	}
 
-	if (bch2_fs_usage_apply(c, fs_usage, trans->disk_res, pos) &&
+	if (bch2_fs_usage_apply(c, fs_usage, trans->disk_res) &&
 	    !warned_disk_usage &&
 	    !xchg(&warned_disk_usage, 1)) {
 		char buf[200];

fs/bcachefs/buckets.h

@@ -260,7 +260,7 @@ int bch2_mark_key(struct bch_fs *, struct bkey_s_c,
 		  struct bch_fs_usage *, u64, unsigned);
 void bch2_mark_update(struct btree_insert *, struct btree_insert_entry *);
 int bch2_fs_usage_apply(struct bch_fs *, struct bch_fs_usage *,
-			struct disk_reservation *, struct gc_pos);
+			struct disk_reservation *);
 
 /* disk reservations: */