Hello! > I can reproduce your issue on my side with above patch (and only when > F_GUEST_ANNOUNCE is not set at DPDK vhost lib). TBH, I don't know > why that happened, the cause could be subtle, and I don't think it's > worthwhile to dig it, especially it's not the right way to do it.
May be not right, may be it can be done... Actually, i found what was wrong. qemu tries to feed features back to vhost-user via VHOST_USER_SET_FEATURES, and DPDK barfs on the unknown bit. More tweaking is needed for qemu to do the trick correctly. > So, would you please try to set the F_GUEST_ANNOUNCE flag on DPDK vhost > lib side, as my early diff showed and have another test? Tried it, works fine, thank you. I have almost implemented the workaround in qemu... However now i start to think that you are right. Theoretically, the application may want to suppress GUEST_ANNOUNCE for some reason. So, let it stay this way. Please include this bit into your v2. Kind regards, Pavel Fedin Expert Engineer Samsung Electronics Research center Russia
