------- Comment From bjki...@us.ibm.com 2015-02-16 18:56 EDT------- The patch referenced in comment #14 resolves this issue. Can we get this patch pulled into in 15.04?
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1419938 Title: hang in mlx5_create_map_eq in Ubuntu 15.04 due to not getting interrupts (mlx5) (Mellanox) Status in linux package in Ubuntu: Confirmed Bug description: ---Problem Description--- While installing Ubuntu 15.04 LE in powerNV system, I see the following error: [ 242.141309] INFO: task systemd-udevd:623 blocked for more than 120 seconds. [ 242.141408] Tainted: G E 3.18.0-12-generic #13-Ubuntu [ 242.141463] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 242.141529] systemd-udevd D 00003fff8ad27d24 0 623 603 0x00040000 [ 242.141597] Call Trace: [ 242.141625] [c000002fe2dbad50] [0000000500000000] 0x500000000 (unreliable) Mellanox Error from trace: [ 2.609984] /build/buildd/linux-3.18.0/drivers/rtc/hctosys.c: unable to open rtc device (rtc0) [ 2.611142] Freeing unused kernel memory: 5760K (c000000000d90000 - c000000001330000) starting version 218 [ 2.664785] scsi_transport_fc: module verification failed: signature and/or required key missing - tainting kernel [ 2.668055] mlx4_core: Mellanox ConnectX core driver v2.2-1 (Feb, 2014) [ 2.668124] mlx4_core: Initializing 0000:01:00.0 ---uname output--- Linux powerio-le21 3.16.0-23-generic #31-Ubuntu SMP Tue Oct 21 17:55:08 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux ---Additional Hardware Info--- Mellanox device which seems to be causing the error: 0000:01:00.0 Ethernet controller: Mellanox Technologies MT26448 [ConnectX EN 10GigE, PCIe 2.0 5GT/s] (rev b0) Machine Type = 8286-42A PowerNV ---Debugger--- ---Steps to Reproduce--- 1. Start install of Ubuntu 15.04 LE 2. Installer does not start at all. We see the error Install ISO Information: Ubuntu 15.04 - vivid-server-ppc64el.iso Install method: DVD Install disk info: # ethtool -i eth17 driver: mlx4_en version: 2.2-1 (Feb 2014) firmware-version: 2.9.1326 bus-info: 0000:01:00.0 supports-statistics: yes supports-test: yes supports-eeprom-access: no supports-register-dump: no supports-priv-flags: yes The issue is that we are not getting interrupts. I forced to install Mellanox OFED in my virtual guest with ubuntu 15.04 and I do not see the issue with that code so I will try to look tonight for differences between that code and upstream to see if I can spot the issue. The problem is related to the following commit: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/patch/drivers/net/ethernet/mellanox/mlx5/core?id=c7a08ac7ee68b9af0d5af99c7b34b574cac4d144 They forgot to set the page size for UAR to adapter so that is why is not working. So any kernel for power that gets that patch in mlx5 will see this issue. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1419938/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
