On Wed, Nov 30, 2016 at 08:04:36PM -0800, L A Walsh wrote: > Related -- wondering about how external journals would affect need > for barriers. XFS correctly orders the cache flushes for it's different devices to ensure integrity. e.g. it flushes the caches of the data device which contains the filesytsem metadata before it issues the the FUA write to the external log device. And it does all the right cache flushes for both data and real-time devices on fsync to ensure data updates are stable, too. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
