Commit 059f791c authored by David Sterba's avatar David Sterba
Browse files

btrfs: make state preallocation more speculative in __set_extent_bit 



Similar to __clear_extent_bit, do not fail if the state preallocation
fails as we might not need it. One less BUG_ON.

Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 03bf5387

fs/btrfs/extent_io.c

+7 −1
Original line number Diff line number Diff line
@@ -873,8 +873,14 @@ __set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, 
	bits |= EXTENT_FIRST_DELALLOC;

again:

	if (!prealloc && gfpflags_allow_blocking(mask)) {

		/*

		 * Don't care for allocation failure here because we might end

		 * up not needing the pre-allocated extent state at all, which

		 * is the case if we only have in the tree extent states that

		 * cover our input range and don't cover too any other range.

		 * If we end up needing a new extent state we allocate it later.

		 */

		prealloc = alloc_extent_state(mask);

		BUG_ON(!prealloc);

	}



	spin_lock(&tree->lock);