https://bugzilla.kernel.org/show_bug.cgi?id=71641 Theodore Tso <tytso@xxxxxxx> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |tytso@xxxxxxx --- Comment #4 from Theodore Tso <tytso@xxxxxxx> --- Could you retry your measurements using the latest kernel? At least 3.11, and preferably 3.13. We significantly optimized the write path for the nodelalloc case in 3.11. That should fix the average size being so small for the nodelalloc case: commit 20970ba65d5a22f2e4efbfa100377722fde56935 Author: Theodore Ts'o <tytso@xxxxxxx> Date: Thu Jun 6 14:00:46 2013 -0400 ext4: use ext4_da_writepages() for all modes Rename ext4_da_writepages() to ext4_writepages() and use it for all modes. We still need to iterate over all the pages in the case of data=journalling, but in the case of nodelalloc/data=ordered (which is what file systems mounted using ext3 backwards compatibility will use) this will allow us to use a much more efficient I/O submission path. Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx> -- You are receiving this mail because: You are watching the assignee of the bug. -- 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
