Hi, I tested the kernel and it is fixing this issue.
Verified with command: #for i in {0..5}; do modprobe -rv ib_ipoib; sleep 5; modprobe -v ib_ipoib; sleep 5; ifconfig ib0 11.135.196.7/16; sleep 5; done uname -a: Linux reg-l-vrt-036-007 3.19.0-23-generic #24-Ubuntu SMP Tue Jul 7 18:52:55 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux dmegs: [ 15.208908] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 639.091197] mlx5_ib: Mellanox Connect-IB Infiniband driver v2.2-1 (Feb 2014) [ 724.788318] IPv6: ADDRCONF(NETDEV_UP): ib0: link is not ready [ 724.801980] IPv6: ADDRCONF(NETDEV_CHANGE): ib0: link becomes ready [ 772.052993] IPv6: ADDRCONF(NETDEV_UP): ib0: link is not ready [ 772.056608] IPv6: ADDRCONF(NETDEV_CHANGE): ib0: link becomes ready [ 794.909398] IPv6: ADDRCONF(NETDEV_UP): ib0: link is not ready [ 794.912980] IPv6: ADDRCONF(NETDEV_CHANGE): ib0: link becomes ready [ 810.996256] IPv6: ADDRCONF(NETDEV_UP): ib0: link is not ready [ 810.999475] IPv6: ADDRCONF(NETDEV_CHANGE): ib0: link becomes ready [ 826.182059] IPv6: ADDRCONF(NETDEV_UP): ib0: link is not ready [ 826.185445] IPv6: ADDRCONF(NETDEV_CHANGE): ib0: link becomes ready [ 843.741871] IPv6: ADDRCONF(NETDEV_UP): ib0: link is not ready [ 843.745190] IPv6: ADDRCONF(NETDEV_CHANGE): ib0: link becomes ready [ 860.196937] IPv6: ADDRCONF(NETDEV_UP): ib0: link is not ready [ 860.200349] IPv6: ADDRCONF(NETDEV_CHANGE): ib0: link becomes ready [ 879.430210] IPv6: ADDRCONF(NETDEV_UP): ib0: link is not ready [ 879.433895] IPv6: ADDRCONF(NETDEV_CHANGE): ib0: link becomes ready [ 899.534312] IPv6: ADDRCONF(NETDEV_UP): ib0: link is not ready [ 899.538097] IPv6: ADDRCONF(NETDEV_CHANGE): ib0: link becomes ready [ 1108.823736] IPv6: ADDRCONF(NETDEV_UP): ib0: link is not ready [ 1108.828015] IPv6: ADDRCONF(NETDEV_CHANGE): ib0: link becomes ready Thanks, Kamal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1467912 Title: error "ib_dealloc_pd failed" when load unload ib_ipoib module To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1467912/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs