On 16/07/2015 13:24, Christian Borntraeger wrote: > The interesting part is that this problem required 2 or more disk > (and we replace drain_all with single drains) so it somewhat sounds > plausible.
Yes, indeed. It is very plausible. I wanted to reproduce it these days, so thanks for saving me a lot of time! I'll test your exact setup (master + AioContext fix + cherry-pick of a0710f7995f + revert of 53ec73e26). Thanks, Paolo