Btrfs: Don't do btree balance_dirty_pages on old kernels, it stalls forever (188de649) · Commits · e / devices / android_kernel_oneplus_sm7250

fs/btrfs/disk-io.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -1655,6 +1655,11 @@ void btrfs_throttle(struct btrfs_root *root)

		void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr)
		{
		/*
		* looks as though older kernels can get into trouble with
		* this code, they end up stuck in balance_dirty_pages forever
		*/
		#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23)
		struct extent_io_tree *tree;
		u64 num_dirty;
		u64 start = 0;
		@@ -1670,6 +1675,9 @@ void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr)
		balance_dirty_pages_ratelimited_nr(
		root->fs_info->btree_inode->i_mapping, 1);
		}
		#else
		return;
		#endif
		}

		void btrfs_set_buffer_defrag(struct extent_buffer *buf)