On 3/15/23 1:01?PM, Stefan Hajnoczi wrote: > On Wed, Mar 15, 2023 at 09:19:39AM -0600, Jens Axboe wrote: >> On 3/15/23 9:15?AM, Stefan Hajnoczi wrote: >>> Hi Ming and Jens, >>> It would be great if you have time to clarify whether deadlocks can >>> occur or not. If you have any questions about the scenario I was >>> describing, please let me know. >> >> I don't believe there is. In anything not ancient, you are always >> allowed to submit and the documentation should be updated to >> describe that correctly. We don't return -EBUSY for submits with >> overflow pending. > > Thank you both for the discussion! It has helped. Would like to add that while I don't think ring resizing is necessary because of any potential deadlocks, I do think CQ ring resizing would be a useful addition to avoid networked applications using giant CQ ring sizes by default... If we had that, you could start smaller and make it larger if you ran into overflows. -- Jens Axboe
