On Tue, Jun 4, 2013 at 11:04 AM, Martin K. Petersen <martin.petersen@xxxxxxxxxx> wrote: >>>>>> "hpa" == H Peter Anvin <hpa@xxxxxxxxx> writes: > > hpa> One subdevice accepts it and the other doesn't, presumably. > > Ah. Well fail the command and let the block layer deal with it. This is > really no different from the discard case. > Which md also does not handle if the device later returns "illegal request" to a discard command. My point about one device accepting the write and another device dropping it is we now have an inconsistent array and a write command to complete. So I don't see how md can wait/trust that the upper layer will retry and fix things up? Translate and retry internally for these command types, return success to the original request, and disable future requests. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
