Hello, On 08/18/2010 11:46 AM, Christoph Hellwig wrote: > FYI: One issue with this series is that make_request based drivers > not have to access all REQ_FLUSH and REQ_FUA requests. We'll either > need to add handling to empty REQ_FLUSH requests to all of them or > figure out a way to prevent them getting sent. That is assuming they'll > simply ignore REQ_FLUSH/REQ_FUA on normal writes. Can you be a bit more specific? In most cases, request based drivers should be fine. They sit behind the front most request_queue which would discompose REQ_FLUSH/FUAs into appropriate command sequence. For the request based drivers, it's not different from the original REQ_HARDBARRIER mechanism, it'll just see flushes and optionally FUA writes. Thanks. -- tejun -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
