On 1/30/20 11:34 PM, Christoph Hellwig wrote:
Can you explain this check? This looks weird to me I think we need a generalized check if a make_request based driver supports REQ_NOWAIT instead (and as a separate patch / patchset).
Original check used to reject polled IO for stackable block devices as "not supported". To solve that situation I introduced additional check to reject all non REQ_HIPRI requests. That check is not intended to generalize, like you indicated, but to conservatively select which requests to accept.
Perhaps there is better way to do that. Any suggestions?
