Hi, I've checked why test ext4/001 fails for me with DAX and after some investigation I've realized that the test assumes that extent_max_zeroout_kb is 32 KB and thus unwritten extent will get converted to written as a whole and not split. With DAX that doesn't happen (because of difference between EXT4_GET_BLOCKS_ flags passed in writeback path and DAX write path) and so the result differs. So I was wondering how to best fix this. Either we could switch extent_max_zeroout_kb to 0 to make the result same (but that has a slight disadvantage that we would lose testing of the zeroout logic) or we could increase file size so that zeroout doesn't trigger or something else? Anyone has some idea? Honza -- Jan Kara <jack@xxxxxxxx> SUSE Labs, CR -- 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
