Comment 2 for bug 1745104

------- Comment From <email address hidden> 2018-01-24 15:10 EDT-------
(In reply to comment #6)
> I built a test kernel with commit 2621e945fbf1d6df5f3f0ba7be5bae3d2cf9b6a5.
> The test kernel can be downloaded from:
> http://kernel.ubuntu.com/~jsalisbury/lp1745104
>
> Can you test this kernel and see if it resolves this bug?
>
> Note, to test this kernel, you need to install both the linux-image and
> linux-image-extra .deb packages.
>
> Thanks in advance!

Thanks. It works but I see another error the "makedumpfile Failed".

root@boslcp4g5:~# echo c > /proc/sysrq-trigger
[ 80.255377] sysrq: SysRq : Trigger a crash
[ 80.255490] Unable to handle kernel paging request for data at address 0x00000000
[ 80.255597] Faulting instruction address: 0xc00000000078f608
[ 80.255708] Oops: Kernel access of bad area, sig: 11 [#1]
[ 80.255781] SMP NR_CPUS=2048
[ 80.255782] NUMA
[ 80.255837] pSeries
[ 80.255930] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 nfs lockd grace fscache sctp_diag sctp libcrc32c dccp_diag dccp tcp_diag udp_diag raw_diag inet_diag unix_diag af_packet_diag netlink_diag binfmt_misc vmx_crypto crct10dif_vpmsum dm_service_time dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua sch_fq_codel sunrpc ip_tables x_tables autofs4 btrfs xor raid6_pq crc32c_vpmsum virtio_net virtio_scsi
[ 80.256798] CPU: 12 PID: 1928 Comm: bash Not tainted 4.13.0-17-generic #20~lp1745104
[ 80.256907] task: c0000000053c8a00 task.stack: c0000001ec3dc000
[ 80.257010] NIP: c00000000078f608 LR: c000000000790538 CTR: c00000000078f5e0
[ 80.257116] REGS: c0000001ec3df9f0 TRAP: 0300 Not tainted (4.13.0-17-generic)
[ 80.257221] MSR: 8000000000009033 <SF,EE,ME,IR,DR,RI,LE>
[ 80.257232] CR: 28422222 XER: 20040000
[ 80.257355] CFAR: c000000000790534 DAR: 0000000000000000 DSISR: 42000000 SOFTE: 1
[ 80.257355] GPR00: c000000000790538 c0000001ec3dfc70 c000000001606000 0000000000000063
[ 80.257355] GPR04: c0000001feeeade8 c0000001fef02068 6967676572206120 63726173680d0a72
[ 80.257355] GPR08: 0000000000000007 0000000000000001 0000000000000000 0000000000000000
[ 80.257355] GPR12: c00000000078f5e0 c000000007ac7e00 0000000010180df8 0000000010189e30
[ 80.257355] GPR16: 0000000010189ea8 0000000010151210 000000001018bd58 000000001018de48
[ 80.257355] GPR20: 00000000121f0248 0000000000000001 0000000010164590 0000000010163bb0
[ 80.257355] GPR24: 00007fffd06a0724 00007fffd06a0720 c00000000150a570 0000000000000002
[ 80.257355] GPR28: 0000000000000063 0000000000000004 c0000000014922f4 c00000000150a910
[ 80.258340] NIP [c00000000078f608] sysrq_handle_crash+0x28/0x30
[ 80.258433] LR [c000000000790538] __handle_sysrq+0xf8/0x2b0
[ 80.258504] Call Trace:
[ 80.258546] [c0000001ec3dfc70] [c000000000790518] __handle_sysrq+0xd8/0x2b0 (unreliable)
[ 80.258657] [c0000001ec3dfd10] [c000000000790d34] write_sysrq_trigger+0x64/0x90
[ 80.258789] [c0000001ec3dfd40] [c00000000044c0c8] proc_reg_write+0x88/0xd0
[ 80.258883] [c0000001ec3dfd70] [c00000000039db8c] __vfs_write+0x3c/0x70
[ 80.258975] [c0000001ec3dfd90] [c00000000039f7c8] vfs_write+0xd8/0x220
[ 80.259067] [c0000001ec3dfde0] [c0000000003a1648] SyS_write+0x68/0x110
[ 80.259159] [c0000001ec3dfe30] [c00000000000b184] system_call+0x58/0x6c
[ 80.259248] Instruction dump:
[ 80.259306] 4bfff9f1 4bfffe50 3c4c00e7 38426a20 7c0802a6 60000000 39200001 3d42001d
[ 80.259420] 394ad788 912a0000 7c0004ac 39400000 <992a0000> 4e800020 3c4c00e7 384269f0
[ 80.259538] ---[ end trace 1a6f8bd87bc98f1a ]---
[ 80.266608]
[ 80.266754] Sending IPI to other CPUs
[ 80.332950] IPI complete
[ 80.343090] kexec: Starting switchover sequence.
I'm in purgatory
-> smp_release_cpus()
spinning_secondaries = 15
<- smp_release_cpus()
Linux ppc64le
#20~lp1745104 SM[ 0.964806] Unable to open file: /etc/keys/x509_ima.der (-2)
[ 0.964813] Unable to open file: /etc/keys/x509_evm.der (-2)
[ 1.129495] vio vio: uevent: failed to send synthetic uevent
/dev/sde2: recovering journal
/dev/sde2: clean, 87024/3932160 files, 1989241/15726336 blocks
[ 2.090741] nvram: Failed to find partition of-config, err 0
[ 3.200128] vio vio: uevent: failed to send synthetic uevent
[ OK ] Started Show Plymouth Boot Screen.
plymouth-start.service
[ OK ] Reached target Local Encrypted Volumes.
[ OK ] Started Forward Password Requests to Plymouth Directory Watch.
systemd-tmpfiles-setup.service
[ OK ] Started Create Volatile Files and Directories.
Starting Update UTMP about System Boot/Shutdown...
Starting Network Time Synchronization...
[ OK ] Started Update UTMP about System Boot/Shutdown.
systemd-update-utmp.service
[ OK ] Started Network Time Synchronization.
[ OK ] Reached target System Time Synchronized.
systemd-timesyncd.service
apparmor.service
[ OK ] Started AppArmor initialization.
[ OK ] Reached target System Initialization.
[ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.
[ OK ] Started Wait for Network to be Configured.
systemd-networkd-wait-online.service
[ OK ] Reached target Network is Online.
Starting Kernel crash dump capture service...
Starting RMC-Resource Monitioring and Control StartOnly...
[ 8.478318] kdump-tools[868]: Starting kdump-tools: * running makedumpfile -c -d 31 /proc/vmcore /var/crash/201801240706/dump-incomplete
Checking for memory holes : [100.0 %] | readmem: Can't convert a virtual address(c00a000000800000) to physical address.
[ 8.524077] kdump-tools[868]: readmem: type_addr: 0, addr:c00a000000800000, size:16384
[ 8.524533] kdump-tools[868]: __exclude_unnecessary_pages: Can't read the buffer of struct page.
[ 8.524978] kdump-tools[868]: create_2nd_bitmap: Can't exclude unnecessary pages.
[ 8.525465] kdump-tools[868]: The kernel version is not supported.
[ 8.525582] kdump-tools[868]: The makedumpfile operation may be incomplete.
[ 8.525684] kdump-tools[868]: makedumpfile Failed.
[ 8.526933] kdump-tools[868]: * kdump-tools: makedumpfile failed, falling back to 'cp'
[ 15.367526] kdump-tools[868]: * kdump-tools: saved vmcore in /var/crash/201801240706