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.
