ext4: avoid unneeded ext4_ext_next_leaf_block() while inserting extents (598dbdf2) · Commits · 戴 / test

Optimize ext4_ext_insert_extent() by avoiding ext4_ext_next_leaf_block() when the result is not used/needed. Signed-off-by:

fs/ext4/extents.c

+4 −3

Original line number	Diff line number	Diff line
		@@ -1730,9 +1730,10 @@ int ext4_ext_insert_extent(handle_t handle, struct inode inode,

		/* probably next leaf has space for us? */
		fex = EXT_LAST_EXTENT(eh);
		next = EXT_MAX_BLOCKS;
		if (le32_to_cpu(newext->ee_block) > le32_to_cpu(fex->ee_block))
		next = ext4_ext_next_leaf_block(inode, path);
		if (le32_to_cpu(newext->ee_block) > le32_to_cpu(fex->ee_block)
		&& next != EXT_MAX_BLOCKS) {
		if (next != EXT_MAX_BLOCKS) {
		ext_debug("next leaf block - %d\n", next);
		BUG_ON(npath != NULL);
		npath = ext4_ext_find_extent(inode, next, NULL);