The aim of this patch is to optimize a search of an extent while doing right shift using binsearch. Cc: Namjae Jeon <namjae.jeon@xxxxxxxxxxx> Cc: "Theodore Ts'o" <tytso@xxxxxxx> Cc: Andreas Dilger <adilger.kernel@xxxxxxxxx> Cc: linux-ext4@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx --- fs/ext4/extents.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 9fbf92ca358c..f65cc2762780 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -5433,10 +5433,15 @@ ext4_ext_shift_extents(struct inode *inode, handle_t *handle, else /* Beginning is reached, end of the loop */ iterator = NULL; - /* Update path extent in case we need to stop */ - while (le32_to_cpu(extent->ee_block) < start) - extent++; - path[depth].p_ext = extent; + if (le32_to_cpu(extent->ee_block) < start) + /* + * Desired extent is somewhere in the middle, + * do binsearch and update a path with it. + */ + ext4_ext_binsearch(inode, &path[depth], start); + else + /* Set the first extent */ + path[depth].p_ext = extent; } ret = ext4_ext_shift_path_extents(path, shift, inode, handle, SHIFT); -- 2.10.2 -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
