Comment 0 for bug 1368991

hello -

we had a freshly installed 14.04.1 server run into disk access issues after swapping out a hard drive. on further investigation, whenever a drive is pulled (on both the mptsas and mpt2sas systems i can test) the included warning is logged.

the message is reproducible simply by pulling a drive, but i have not seen a recurrence of the issue where other drives become unresponsive.

the attached upstream patch ( https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=6aa6caff30f5dcb9e55b03b9710c30b83750cae5 ) has been applied to both 3.12.23 and 3.14.7. when i applied it locally to the packaged linux-source the resulting kernel does not log these warnings.

as it it a fairly trivial patch, i'm hopeful that it could be included as an SRU.

thank you for your time and effort!

andy

kern :warn : [Thu Sep 11 14:50:08 2014] ------------[ cut here ]------------
kern :warn : [Thu Sep 11 14:50:08 2014] WARNING: CPU: 0 PID: 27756 at /build/buildd/linux-3.13.0/fs/sysfs/group.c:214 sysfs_remove_group+0xc6/0xd0()
kern :warn : [Thu Sep 11 14:50:08 2014] sysfs group ffffffff81cabde0 not found for kobject 'end_device-6:1:23'
kern :warn : [Thu Sep 11 14:50:08 2014] Modules linked in: drbd lru_cache libcrc32c 8021q garp mrp autofs4 ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi nfsv3 sch_sfq nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache bridge stp llc bonding gpio_ich joydev intel_powerclamp dm_multipath coretemp scsi_dh kvm_intel kvm i7core_edac lpc_ich vhost_net edac_core ioatdma serio_raw vhost macvtap macvlan mac_hid ipmi_si ipmi_devintf usbkbd ses enclosure raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor hid_generic usbhid hid raid6_pq raid1 igb raid0 mptsas i2c_algo_bit mptscsih ahci multipath dca ptp mptbase libahci psmouse linear scsi_transport_sas pps_core
kern :warn : [Thu Sep 11 14:50:08 2014] CPU: 0 PID: 27756 Comm: kworker/u49:6 Not tainted 3.13.0-35-generic #62-Ubuntu
kern :warn : [Thu Sep 11 14:50:08 2014] Hardware name: Supermicro X8DT3/X8DT3, BIOS 2.0a 09/14/2010
kern :warn : [Thu Sep 11 14:50:08 2014] Workqueue: mpt/0 mptsas_firmware_event_work [mptsas]
kern :warn : [Thu Sep 11 14:50:08 2014] 0000000000000009 ffff880126a01ac8 ffffffff8171e320 ffff880126a01b10
kern :warn : [Thu Sep 11 14:50:08 2014] ffff880126a01b00 ffffffff8106775d 0000000000000000 ffffffff81cabde0
kern :warn : [Thu Sep 11 14:50:08 2014] ffff880bf9410c10 ffff880bf986e400 5003048000d2e6da ffff880126a01b60
kern :warn : [Thu Sep 11 14:50:08 2014] Call Trace:
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff8171e320>] dump_stack+0x45/0x56
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff8106775d>] warn_slowpath_common+0x7d/0xa0
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff810677cc>] warn_slowpath_fmt+0x4c/0x50
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff81234b3e>] ? sysfs_get_dirent_ns+0x4e/0x70
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff81235e26>] sysfs_remove_group+0xc6/0xd0
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff8149bb23>] dpm_sysfs_remove+0x43/0x50
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff81491525>] device_del+0x45/0x1c0
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff814916be>] device_unregister+0x1e/0x60
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff813507de>] bsg_unregister_queue+0x5e/0xa0
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffffa001516c>] sas_rphy_free+0xac/0xe0 [scsi_transport_sas]
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffffa0017085>] sas_port_delete+0x35/0x170 [scsi_transport_sas]
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff81235033>] ? sysfs_remove_link+0x23/0x30
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffffa009e745>] mptsas_del_end_device+0x185/0x270 [mptsas]
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffffa00a45d4>] mptsas_hotplug_work+0x1f4/0x9b0 [mptsas]
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffffa00a56c1>] mptsas_firmware_event_work+0x3e1/0xf4c [mptsas]
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff8101b763>] ? native_sched_clock+0x13/0x80
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff8101b7d9>] ? sched_clock+0x9/0x10
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff8109d415>] ? sched_clock_cpu+0xb5/0x100
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff810125c6>] ? __switch_to+0x126/0x4c0
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff810839d2>] process_one_work+0x182/0x450
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff810847c1>] worker_thread+0x121/0x410
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff810846a0>] ? rescuer_thread+0x430/0x430
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff8108b4a2>] kthread+0xd2/0xf0
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff8108b3d0>] ? kthread_create_on_node+0x1c0/0x1c0
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff8172ecbc>] ret_from_fork+0x7c/0xb0
kern :warn : [Thu Sep 11 14:50:08 2014] [<ffffffff8108b3d0>] ? kthread_create_on_node+0x1c0/0x1c0
kern :warn : [Thu Sep 11 14:50:08 2014] ---[ end trace ad4ab1f037505d41 ]---

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-35-generic 3.13.0-35.62
ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
Uname: Linux 3.13.0-35-generic x86_64
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116, 1 Sep 10 10:02 seq
 crw-rw---- 1 root audio 116, 33 Sep 10 10:02 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.14.1-0ubuntu3.3
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory: 'iw'
Date: Fri Sep 12 15:35:25 2014
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: Supermicro X8DT6
PciMultimedia:

ProcEnviron:
 TERM=rxvt-unicode-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/usr/bin/zsh
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic root=/dev/md0 ro consoleblank=0 console=tty0 console=ttyS2,115200n8 nomdmonddf nomdmonisw bootdegraded=true
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-35-generic N/A
 linux-backports-modules-3.13.0-35-generic N/A
 linux-firmware 1.127.5
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/15/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2.0c
dmi.board.asset.tag: 1234567890
dmi.board.name: X8DT6
dmi.board.vendor: Supermicro
dmi.board.version: 1234567890
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 17
dmi.chassis.vendor: Supermicro
dmi.chassis.version: 1234567890
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2.0c:bd05/15/2012:svnSupermicro:pnX8DT6:pvr1234567890:rvnSupermicro:rnX8DT6:rvr1234567890:cvnSupermicro:ct17:cvr1234567890:
dmi.product.name: X8DT6
dmi.product.version: 1234567890
dmi.sys.vendor: Supermicro