> On Apr 27, 2017, at 2:57 AM, Sagi Grimberg <sagi@xxxxxxxxxxx> wrote: > > >> Folks, I have to apologize here. Flow control was at one point configured correctly, but we had a power outage in our lab two weeks ago. >> We thought the switch had come back up OK, but late week we were double-checking all the ports in use and we found one port had lost some >> settings and no longer had flow control enabled (it had also reverted from 100Gb to 50Gb for some reason). After fixing the port settings >> we ran IO through the weekend and the early part of this week on a variety of workloads. We don't seem to be able to reproduce the failure >> after fixing the port settings. It looks like this one may have been caused by the lost flow control setting on the switch. Sorry for the confusion! > > Yep, don't expect RoCE to work without flow-control. Sagi and all, Starting in next release, for ConnectX-4 and above PFC isn't required as long as ECN is enabled. With current release we also expect to get good results with ECN and no PFC. Joseph - is ECN enabled on your system? Thanks > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
