On Tue, May 20 2008, Jamie Lokier wrote: > Does WRITE_BARRIER always cause a flush? It does not have to > according to Documentation/block/barrier.txt. There are caveats about > tagged queuing "not yet implemented" in the text, but can we rely on > that? The documentation is older than the current implementation; > those caveats might no longer apply. It does, if you use ordered tags then that assumes write through caching (or ordered tag + drain + flush after completion). -- Jens Axboe -- 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
