You have been subscribed to a public bug: == Comment: #0 - PAVITHRA R. PRAKASH - 2016-09-21 00:50:22 == ---Problem Description---
Ubuntu 16.10: kdump is not working in 4.8 kernel. ---Steps to Reproduce--- 1) apt-get install linux-crashdump 2) increase crashdump size: sudo vim /etc/default/grub.d/kexec-tools.cfg GRUB_CMDLINE_LINUX_DEFAULT="$GRUB_CMDLINE_LINUX_DEFAULT crashkernel=2G- 4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M" 3) sudo update-grub ; reboot the machine 4) sudo sed -i 's/USE_KDUMP=0/USE_KDUMP=1/g' /etc/default/kdump-tools 5) kdump-config show 6) echo "c" > /proc/sysrq-trigger Logs ==== root@ubuntu:/home/ubuntu# uname -a Linux ubuntu 4.8.0-11-generic #12-Ubuntu SMP Sat Sep 17 19:58:16 UTC 2016 ppc64le ppc64le ppc64le GNU/Linux root@ubuntu:/home/ubuntu# kdump-config show DUMP_MODE: kdump USE_KDUMP: 1 KDUMP_SYSCTL: kernel.panic_on_oops=1 KDUMP_COREDIR: /var/crash crashkernel addr: /var/lib/kdump/vmlinuz: symbolic link to /boot/vmlinux-4.8.0-11-generic kdump initrd: /var/lib/kdump/initrd.img: symbolic link to /var/lib/kdump/initrd.img-4.8.0-11-generic current state: ready to kdump kexec command: /sbin/kexec -p --command-line="BOOT_IMAGE=/boot/vmlinux-4.8.0-11-generic root=UUID=7ea3831b-f4c3-4f69-8f77-79aefcda70e3 ro splash quiet irqpoll nr_cpus=1 nousb systemd.unit=kdump-tools.service" --initrd=/var/lib/kdump/initrd.img /var/lib/kdump/vmlinuz root@ubuntu:/home/ubuntu# cd root@ubuntu:~# echo "c" > /proc/sysrq-trigger [ 50.733424] sysrq: SysRq : Trigger a crash [ 50.733437] Unable to handle kernel paging request for data at address 0x00000000 [ 50.733441] Faulting instruction address: 0xc0000000005af3f4 [ 50.733444] Oops: Kernel access of bad area, sig: 11 [#1] [ 50.733446] SMP NR_CPUS=2048 NUMA pSeries [ 50.733450] Modules linked in: rpadlpar_io rpaphp dccp_diag dccp tcp_diag udp_diag inet_diag unix_diag af_packet_diag netlink_diag pseries_rng sg rng_core binfmt_misc ghash_generic gf128mul vmx_crypto ip_tables x_tables autofs4 ext4 crc16 jbd2 fscrypto mbcache sr_mod cdrom sd_mod bnx2x ibmvscsi ibmveth scsi_transport_srp ptp pps_core mdio libcrc32c crc32c_generic crc32c_vpmsum [ 50.733477] CPU: 2 PID: 1517 Comm: bash Not tainted 4.8.0-11-generic #12-Ubuntu [ 50.733480] task: c0000004f7906880 task.stack: c0000004f7898000 [ 50.733482] NIP: c0000000005af3f4 LR: c0000000005b04d8 CTR: c0000000005af3c0 [ 50.733485] REGS: c0000004f789b990 TRAP: 0300 Not tainted (4.8.0-11-generic) [ 50.733488] MSR: 8000000000009033 <SF,EE,ME,IR,DR,RI,LE> CR: 28242422 XER: 00000001 [ 50.733496] CFAR: c0000000000087d0 DAR: 0000000000000000 DSISR: 42000000 SOFTE: 1 GPR00: c0000000005b04d8 c0000004f789bc10 c000000000f46700 0000000000000063 GPR04: c0000005ef78a9b8 c0000005ef79f7d8 c00000063fe82300 0000000000005970 GPR08: 0000000000000007 0000000000000001 0000000000000000 0000000000000001 GPR12: c0000000005af3c0 c000000007b31200 ffffffffffffffff 0000000022000000 GPR16: 0000000010170dc8 00000100111c0538 0000000010140f58 00000000100c7570 GPR20: 0000000000000000 000000001017dd58 0000000010153618 000000001017b608 GPR24: 00003ffff10b9624 0000000000000001 c000000000e9fd40 0000000000000004 GPR28: c000000000ea0100 0000000000000063 c000000000e528e8 0000000000000000 [ 50.733536] NIP [c0000000005af3f4] sysrq_handle_crash+0x34/0x50 [ 50.733539] LR [c0000000005b04d8] __handle_sysrq+0xe8/0x280 [ 50.733541] Call Trace: [ 50.733544] [c0000004f789bc10] [c0000000009ff9e8] 0xc0000000009ff9e8 (unreliable) [ 50.733548] [c0000004f789bc30] [c0000000005b04d8] __handle_sysrq+0xe8/0x280 [ 50.733552] [c0000004f789bcd0] [c0000000005b0c88] write_sysrq_trigger+0x78/0xa0 [ 50.733556] [c0000004f789bd00] [c0000000003a9a90] proc_reg_write+0xb0/0x110 [ 50.733560] [c0000004f789bd50] [c00000000030c27c] __vfs_write+0x6c/0xe0 [ 50.733564] [c0000004f789bd90] [c00000000030d784] vfs_write+0xd4/0x240 [ 50.733567] [c0000004f789bde0] [c00000000030f49c] SyS_write+0x6c/0x110 [ 50.733571] [c0000004f789be30] [c0000000000095e0] system_call+0x38/0x108 [ 50.733574] Instruction dump: [ 50.733576] 38427340 7c0802a6 f8010010 f821ffe1 60000000 60000000 3d220019 3949cde0 [ 50.733582] 39200001 912a0000 7c0004ac 39400000 <992a0000> 38210020 e8010010 7c0803a6 [ 50.733589] ---[ end trace f58d72cacaada0df ]--- [ 50.735307] [ 50.735313] Sending IPI to other CPUs [ 50.736336] IPI complete I'm in purgatory -> smp_release_cpus() spinning_secondaries = 8 <- smp_release_cpus() [ 7.250999] sd 0:0:1:0: [sda] Assuming drive cache: write through /dev/sda2: recovering journal /dev/sda2: clean, 139510/1884160 files, 1253112/7531008 blocks [ 8.263985] EXT4-fs (sda2): Cannot load crc32c driver. mount: mounting /dev/sda2 on /root failed: No such file or directory mount: mounting /dev on /root/dev failed: No such file or directory mount: mounting /run on /root/run failed: No such file or directory run-init: current directory on the same filesystem as the root: error 0 Target filesystem doesn't have requested /sbin/init. run-init: current directory on the same filesystem as the root: error 0 run-init: current directory on the same filesystem as the root: error 0 run-init: current directory on the same filesystem as the root: error 0 run-init: current directory on the same filesystem as the root: error 0 run-init: current directory on the same filesystem as the root: error 0 No init found. Try passing init= bootarg. BusyBox v1.22.1 (Ubuntu 1:1.22.0-19ubuntu2) built-in shell (ash) Enter 'help' for a list of built-in commands. (initramfs) (initramfs) (initramfs) (initramfs) exit mount: mounting /sys on /root/sys failed: No such file or directory mount: mounting /proc on /root/proc failed: No such file or directory /init: line 338: can't open /root/dev/console: no such file [ 381.386973] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000200 [ 381.386973] [ 381.386980] CPU: 0 PID: 1 Comm: init Not tainted 4.8.0-11-generic #12-Ubuntu [ 381.386983] Call Trace: [ 381.386988] [c000000026513c20] [c00000000888bb9c] dump_stack+0xb0/0xf0 (unreliable) [ 381.386993] [c000000026513c60] [c00000000888832c] panic+0x144/0x308 [ 381.386997] [c000000026513cf0] [c0000000080ce298] do_exit+0xd08/0xd10 [ 381.387001] [c000000026513dc0] [c0000000080ce384] do_group_exit+0x64/0x100 [ 381.387005] [c000000026513e00] [c0000000080ce44c] SyS_exit_group+0x2c/0x30 [ 381.387008] [c000000026513e30] [c0000000080095e0] system_call+0x38/0x108 [ 381.390557] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000200 [ 381.390557] == Comment: #5 - Kevin W. Rudd - 2016-09-21 16:26:35 == This appears to be similar to the issue noted in the following discussion: https://lists.debian.org/debian-kernel/2016/04/msg00013.html (from the kdump dmesg info attached): [ 9.115577] call_modprobe: crypto-crc32c 2 [ 9.116170] call_modprobe: crypto-crc32c-all 2 [ 9.116709] EXT4-fs (sda2): Cannot load crc32c driver. Forcing the crc32c module by adding it to /etc/initramfs-tools/modules got me past the initial EXT4-fs failure, but kdump then ran into a regression with makedumpfile: [ 12.331294] kdump-tools[1546]: Starting kdump-tools: * running makedumpfile -c -d 31 /proc/vmcore /var/crash/201609211609/dump-incomplete [ 12.391902] kdump-tools[1546]: get_mem_map: Can't distinguish the memory type. [ 12.392406] kdump-tools[1546]: The kernel version is not supported. [ 12.392715] kdump-tools[1546]: The makedumpfile operation may be incomplete. [ 12.392997] kdump-tools[1546]: makedumpfile Failed. [ 12.393309] kdump-tools[1546]: * kdump-tools: makedumpfile failed, falling back to 'cp' ** Affects: makedumpfile (Ubuntu) Importance: Undecided Assignee: Taco Screen team (taco-screen-team) Status: New ** Tags: architecture-ppc64le bot-comment bugnameltc-146571 severity-critical targetmilestone-inin--- -- Ubuntu 16.10: kdump is not working in 4.8 kernel. https://bugs.launchpad.net/bugs/1626269 You received this bug notification because you are a member of Kernel Packages, which is subscribed to makedumpfile in Ubuntu. -- 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
