I built a Xenial test kernel with a cherry-pick of commit 221255aee67. Can you test this kernel and see if it resolves this bug? It can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1622894/ With this kernel, you need to install both the linux-image and linux- image-extra .deb packages. -- 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/1622894 Title: sg devices are not being created for SCSI storage controller devices starting from v4.4.0-30 Status in linux package in Ubuntu: Confirmed Bug description: Most storage array expose a store controller device to logical unit 0. Following LP #1567602, when this happens and the alua driver is loaded, Ubuntu doesn't create the sg device for it, and linux fails to discover the disks that are attached to higher logical unit numbers. With kernel version 4.4.0-31, we tried a number of things: - With a disk mapped to LUN0, everything is working. - Without a disk mapped to LUN0, nothing works - linux doesn't see disks mapped to higher LUNs, calling rescan_scsi_bus throws a stack trace to syslog: https://gist.github.com/grzn/20c05ce3fc96062ec9572fd5b8093b55 - When turning on SCSI logging to the maximum (https://access.redhat.com/articles/337903 - 0xfffffff), we see that after ALUA driver rejected the SCSI controller nothing happens (look for 18:0:0:0 which is a controller here (https://gist.github.com/grzn/f8b65dd07b2df5f3f72ca8121d8c93ad) vs 19:0:00 which is a disk here (https://gist.github.com/grzn/48da86b7f7390dab2983927862cda949). - When removing the scsi_dh_alua driver and then reloading the lpfc driver, everything is working as expected when no disk is mapped to LUN0. --- AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Sep 12 18:00 seq crw-rw---- 1 root audio 116, 33 Sep 12 18:00 timer AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: DistroRelease: Ubuntu 16.04 HibernationDevice: RESUME=UUID=1b089ce2-057f-44d6-9e53-5ee1b7fb5be9 IwConfig: Error: [Errno 2] No such file or directory Lsusb: Error: command ['lsusb'] failed with exit code 1: MachineType: VMware, Inc. VMware Virtual Platform Package: linux (not installed) PciMultimedia: ProcFB: 0 svgadrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-31-generic root=UUID=6738fbd7-7243-4860-949f-717dfd084c43 ro quiet splash ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13 RelatedPackageVersions: linux-restricted-modules-4.4.0-31-generic N/A linux-backports-modules-4.4.0-31-generic N/A linux-firmware 1.157.3 RfKill: Error: [Errno 2] No such file or directory Tags: xenial xenial Uname: Linux 4.4.0-31-generic x86_64 UnreportableReason: The report belongs to a package that is not installed. UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: False dmi.bios.date: 09/17/2015 dmi.bios.vendor: Phoenix Technologies LTD dmi.bios.version: 6.00 dmi.board.name: 440BX Desktop Reference Platform dmi.board.vendor: Intel Corporation dmi.board.version: None dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 1 dmi.chassis.vendor: No Enclosure dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd09/17/2015:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A: dmi.product.name: VMware Virtual Platform dmi.product.version: None dmi.sys.vendor: VMware, Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1622894/+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
