On Tue, 2017-12-12 at 09:57 +0100, Hannes Reinecke wrote: > With the current design we're waiting for all async probes to > finish when removing any sd device. > This might lead to a livelock where the 'remove' call is blocking > for any probe calls to finish, and the probe calls are waiting for > a response, which will never be processes as the thread handling > the responses is waiting for the remove call to finish. > Which is completely pointless as we only _really_ care for the > probe on _this_ device to be completed; any other probing can > happily continue for all we care. > So save the async probing cookie in the structure and only wait > if this specific probe is still active. >From async_synchronize_cookie_domain(): wait_event(async_done, lowest_in_progress(domain) >= cookie); So async_synchronize_cookie_domain() also waits for multiple asynchronous probes to finish. Does this patch have any advantages over the patch I posted (https://marc.info/?l=linux-scsi&m=151275368714540)? Thanks, Bart.
