On Fri, Nov 02, 2018 at 10:01:04AM +0000, Tim Smith wrote: > If the I/O ring is full, the guest cannot send any more requests > until some responses are sent. Only sending all available responses > just before checking for new work does not leave much time for the > guest to supply new work, so this will cause stalls if the ring gets > full. Also, not completing reads as soon as possible adds latency > to the guest. > > To alleviate that, complete IO requests as soon as they come back. > blk_send_response() already returns a value indicating whether > a notify should be sent, which is all the batching we need. > > Signed-off-by: Tim Smith <tim.sm...@citrix.com>
Acked-by: Anthony PERARD <anthony.per...@citrix.com> -- Anthony PERARD
