Hi again, I was able to trace the performance issues down to the "slub_debug" kernel option which is set in fedora test builds. With this option disabled performance is not great, but not that bad either (~110mb/s on an SSD which usually does 400mb/s sequential). Thanks a lot for nilfs, hopefully it will reduce my suffering after accidential command line desasters ;) Thanks, Clemens -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html