Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.14 kernel[0].
If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.14-rc6 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Tags added: kernel-da-key -- 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/1096002 Title: Multipath does not work with EMC 5300 Storage Status in linux package in Ubuntu: Incomplete Bug description: Hi, I setup one host installed Ubuntu 12.04 with kernel version 3.2.0.I connect the host with EMC Stroage of 5300 with FC directly. I wanted use the feature of multipath, but it does not work. The log is as below: the syslog is : Jan 4 15:32:29 cvknode133 kernel: [14788.818398] device-mapper: table: 252:2: multipath: error getting device Jan 4 15:32:29 cvknode133 kernel: [14788.826062] device-mapper: ioctl: error adding target to table Jan 4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent) Jan 4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove Jan 4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent) Jan 4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove Jan 4 15:32:29 cvknode133 kernel: [14788.828229] device-mapper: table: 252:2: multipath: error getting device Jan 4 15:32:29 cvknode133 kernel: [14788.835525] device-mapper: ioctl: error adding target to table Jan 4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent) Jan 4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove Jan 4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent) Jan 4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove Jan 4 15:32:29 cvknode133 kernel: [14788.839135] device-mapper: table: 252:2: multipath: error getting device Jan 4 15:32:29 cvknode133 kernel: [14788.846118] device-mapper: ioctl: error adding target to table Jan 4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent) Jan 4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove Jan 4 15:32:29 cvknode133 kernel: [14788.849331] device-mapper: table: 252:2: multipath: error getting device Jan 4 15:32:29 cvknode133 kernel: [14788.855998] device-mapper: ioctl: error adding target to table Jan 4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent) Jan 4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove Jan 4 15:32:29 cvknode133 udevd[19111]: inotify_add_watch(6, /dev/dm-2, 10) failed: No such file or directory Jan 4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent) Jan 4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove Jan 4 15:32:29 cvknode133 kernel: [14788.859838] sd 0:0:0:16385: emc: Invalid information section length 128 Jan 4 15:32:29 cvknode133 kernel: [14788.859842] sd 0:0:0:16385: emc: detected Clariion FC (Legacy), flags 1 Jan 4 15:32:29 cvknode133 kernel: [14788.859939] sd 0:0:0:16385: emc: Invalid failover mode 2 Jan 4 15:32:29 cvknode133 kernel: [14788.859942] sd 0:0:0:16385: emc: not attached Jan 4 15:32:29 cvknode133 kernel: [14788.866610] device-mapper: table: 252:2: multipath: error attaching hardware handler Jan 4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent) Jan 4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove Jan 4 15:32:29 cvknode133 kernel: [14788.879802] device-mapper: ioctl: error adding target to table Jan 4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent) Jan 4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove Jan 4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent) Jan 4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove Jan 4 15:32:29 cvknode133 kernel: [14788.882923] sd 0:0:0:16385: emc: Invalid information section length 128 Jan 4 15:32:29 cvknode133 kernel: [14788.882928] sd 0:0:0:16385: emc: detected Clariion FC (Legacy), flags 1 Jan 4 15:32:29 cvknode133 kernel: [14788.883019] sd 0:0:0:16385: emc: Invalid failover mode 2 Jan 4 15:32:29 cvknode133 kernel: [14788.883022] sd 0:0:0:16385: emc: not attached Jan 4 15:32:29 cvknode133 kernel: [14788.889542] device-mapper: table: 252:2: multipath: error attaching hardware handler Jan 4 15:32:29 cvknode133 kernel: [14788.903347] device-mapper: ioctl: error adding target to table Jan 4 15:32:29 cvknode133 udevd[19111]: inotify_add_watch(6, /dev/dm-2, 10) failed: No such file or directory Jan 4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent) Jan 4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove Jan 4 15:32:29 cvknode133 udevd[19111]: inotify_add_watch(6, /dev/dm-2, 10) failed: No such file or directory Jan 4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent) Jan 4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove mutlipath -v3 informations: Jan 04 15:32:29 | sda: state = 2 Jan 04 15:32:29 | sda: checker msg is "cciss_tur checker reports path is down" Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: pgfailover = -1 (internal default) Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: pgpolicy = multibus (controller setting) Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: selector = round-robin 0 (controller setting) Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: features = 0 (controller setting) Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: hwhandler = 0 (controller setting) Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: rr_weight = 1 (controller setting) Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: minio = 1000 (controller setting) Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: no_path_retry = 12 (controller setting) Jan 04 15:32:29 | pg_timeout = NONE (internal default) Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: set ACT_CREATE (map does not exist) Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: domap (0) failure for create/reload map In the kernel source code, in the function: parse_sp_model; I want to know the reason of that why multipath feature can not work. 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