You have been subscribed to a public bug: In ubuntu17.04 as KVM guest on ubuntu KVM Host and trying kdump on guest while kdump process console got hung having call traces
Reproducible Step: 1- Install Ubuntu17.04 as kvm guest on ubuntu kvm host 2- configure kdump 3- trigger kdump Expected Result : Kdump should capture Actual Result : Kdump console hung having continuous call traces LOG: [ 0.488534] Freeing unused kernel memory: 4416K (c000000008e80000 - c0000000092d0000) [ 0.488725] This architecture does not have kernel memory protection. Loading, please wait... starting version 232 [ 0.501616] random: udevadm: uninitialized urandom read (16 bytes read) [ 0.501830] random: udevadm: uninitialized urandom read (16 bytes read) [ 0.501981] random: udevadm: uninitialized urandom read (16 bytes read) [ 0.502162] random: udevadm: uninitialized urandom read (16 bytes read) [ 0.502254] random: udevadm: uninitialized urandom read (16 bytes read) [ 0.502433] random: udevadm: uninitialized urandom read (16 bytes read) [ 0.503188] random: udevadm: uninitialized urandom read (16 bytes read) [ 0.503270] random: udevadm: uninitialized urandom read (16 bytes read) [ 0.503978] random: systemd-udevd: uninitialized urandom read (16 bytes read) [ 0.504218] random: systemd-udevd: uninitialized urandom read (16 bytes read) [ 242.663388] INFO: task systemd-udevd:151 blocked for more than 120 seconds. [ 242.663514] Not tainted 4.9.0-15-generic #16-Ubuntu [ 242.663553] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 242.663755] systemd-udevd D 0 151 145 0x00040002 [ 242.663795] Call Trace: [ 242.663868] [c00000001fe4ecd0] [c00000000801c3a0] __switch_to+0x2e0/0x4c0 [ 242.663964] [c00000001fe4ed30] [c000000008b19398] __schedule+0x2f8/0x990 [ 242.664076] [c00000001fe4ee10] [c000000008b19a78] schedule+0x48/0xc0 [ 242.664179] [c00000001fe4ee40] [c000000008b1de54] schedule_timeout+0x274/0x470 [ 242.664334] [c00000001fe4ef30] [c000000008b19010] io_schedule_timeout+0xd0/0x160 [ 242.664502] [c00000001fe4ef80] [c000000008b1a720] bit_wait_io+0x30/0x90 [ 242.664618] [c00000001fe4efb0] [c000000008b1a168] __wait_on_bit+0xf8/0x170 [ 242.664754] [c00000001fe4f000] [c00000000824b238] wait_on_page_bit+0x98/0xb0 [ 242.664847] [c00000001fe4f060] [c00000000824d60c] do_read_cache_page+0x21c/0x4e0 [ 242.665008] [c00000001fe4f0d0] [c00000000859be78] read_dev_sector+0xb8/0x140 [ 242.665126] [c00000001fe4f100] [c0000000085a5d88] read_lba.isra.0+0x148/0x250 [ 242.665259] [c00000001fe4f170] [c0000000085a652c] efi_partition+0x12c/0x830 [ 242.665363] [c00000001fe4f2e0] [c00000000859e768] check_partition+0x158/0x2d0 [ 242.665469] [c00000001fe4f360] [c00000000859c760] rescan_partitions+0xe0/0x390 [ 242.665552] [c00000001fe4f430] [c000000008371828] __blkdev_get+0x358/0x490 [ 242.665669] [c00000001fe4f4a0] [c000000008372b50] blkdev_get+0x1a0/0x4a0 [ 242.665784] [c00000001fe4f550] [c000000008599538] device_add_disk+0x4a8/0x500 [ 242.665894] [c00000001fe4f600] [d000000000511cc8] virtblk_probe+0x560/0x928 [virtio_blk] [ 242.665983] [c00000001fe4f6c0] [c000000008687700] virtio_dev_probe+0x1d0/0x350 [ 242.666050] [c00000001fe4f700] [c000000008716f30] driver_probe_device+0x240/0x540 [ 242.666116] [c00000001fe4f790] [c00000000871738c] __driver_attach+0x15c/0x160 [ 242.666174] [c00000001fe4f810] [c0000000087138ec] bus_for_each_dev+0x8c/0xf0 [ 242.666232] [c00000001fe4f860] [c0000000087162e4] driver_attach+0x34/0x50 [ 242.666289] [c00000001fe4f880] [c000000008715a78] bus_add_driver+0x238/0x380 [ 242.666345] [c00000001fe4f910] [c00000000871829c] driver_register+0x9c/0x180 [ 242.666403] [c00000001fe4f980] [c000000008686abc] register_virtio_driver+0x4c/0x60 [ 242.666470] [c00000001fe4f9a0] [d000000000512114] init+0x84/0xd4 [virtio_blk] [ 242.666527] [c00000001fe4fa10] [c00000000800dde8] do_one_initcall+0x68/0x1d0 [ 242.666584] [c00000001fe4fad0] [c000000008b28e00] do_init_module+0x90/0x244 [ 242.666643] [c00000001fe4fb60] [c000000008184794] load_module+0x1614/0x17a0 [ 242.666701] [c00000001fe4fd30] [c000000008184c60] SyS_finit_module+0xf0/0x170 [ 242.666759] [c00000001fe4fe30] [c00000000800bd84] system_call+0x38/0xe0 ---------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------- [ 363.701100] md: raid6 personality registered for level 6 [ 363.701169] md: raid5 personality registered for level 5 [ 363.701200] md: raid4 personality registered for level 4 [ 363.713493] md: raid10 personality registered for level 10 done. Begin: Running /scripts/init-premount ... done. Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done. Begin: Running /scripts/local-premount ... done. [ 484.327414] INFO: task systemd-udevd:151 blocked for more than 120 seconds. [ 484.327505] Not tainted 4.9.0-15-generic #16-Ubuntu [ 484.327557] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 484.327648] systemd-udevd D 0 151 145 0x00040002 [ 484.327704] Call Trace: [ 484.327741] [c00000001fe4ecd0] [c00000000801c3a0] __switch_to+0x2e0/0x4c0 [ 484.327824] [c00000001fe4ed30] [c000000008b19398] __schedule+0x2f8/0x990 [ 484.327907] [c00000001fe4ee10] [c000000008b19a78] schedule+0x48/0xc0 [ 484.328015] [c00000001fe4ee40] [c000000008b1de54] schedule_timeout+0x274/0x470 [ 484.328121] [c00000001fe4ef30] [c000000008b19010] io_schedule_timeout+0xd0/0x160 [ 484.328222] [c00000001fe4ef80] [c000000008b1a720] bit_wait_io+0x30/0x90 [ 484.328304] [c00000001fe4efb0] [c000000008b1a168] __wait_on_bit+0xf8/0x170 [ 484.328386] [c00000001fe4f000] [c00000000824b238] wait_on_page_bit+0x98/0xb0 [ 484.328470] [c00000001fe4f060] [c00000000824d60c] do_read_cache_page+0x21c/0x4e0 [ 484.328566] [c00000001fe4f0d0] [c00000000859be78] read_dev_sector+0xb8/0x140 [ 484.328648] [c00000001fe4f100] [c0000000085a5d88] read_lba.isra.0+0x148/0x250 [ 484.328731] [c00000001fe4f170] [c0000000085a652c] efi_partition+0x12c/0x830 [ 484.328812] [c00000001fe4f2e0] [c00000000859e768] check_partition+0x158/0x2d0 [ 484.328919] [c00000001fe4f360] [c00000000859c760] rescan_partitions+0xe0/0x390 [ 484.329017] [c00000001fe4f430] [c000000008371828] __blkdev_get+0x358/0x490 [ 484.329099] [c00000001fe4f4a0] [c000000008372b50] blkdev_get+0x1a0/0x4a0 [ 484.329181] [c00000001fe4f550] [c000000008599538] device_add_disk+0x4a8/0x500 [ 484.329266] [c00000001fe4f600] [d000000000511cc8] virtblk_probe+0x560/0x928 [virtio_blk] [ 484.329361] [c00000001fe4f6c0] [c000000008687700] virtio_dev_probe+0x1d0/0x350 [ 484.329458] [c00000001fe4f700] [c000000008716f30] driver_probe_device+0x240/0x540 [ 484.329551] [c00000001fe4f790] [c00000000871738c] __driver_attach+0x15c/0x160 [ 484.329634] [c00000001fe4f810] [c0000000087138ec] bus_for_each_dev+0x8c/0xf0 [ 484.329715] [c00000001fe4f860] [c0000000087162e4] driver_attach+0x34/0x50 [ 484.329796] [c00000001fe4f880] [c000000008715a78] bus_add_driver+0x238/0x380 [ 484.329876] [c00000001fe4f910] [c00000000871829c] driver_register+0x9c/0x180 [ 484.329957] [c00000001fe4f980] [c000000008686abc] register_virtio_driver+0x4c/0x60 [ 484.330052] [c00000001fe4f9a0] [d000000000512114] init+0x84/0xd4 [virtio_blk] [ 484.330135] [c00000001fe4fa10] [c00000000800dde8] do_one_initcall+0x68/0x1d0 [ 484.330215] [c00000001fe4fad0] [c000000008b28e00] do_init_module+0x90/0x244 [ 484.330298] [c00000001fe4fb60] [c000000008184794] load_module+0x1614/0x17a0 [ 484.330380] [c00000001fe4fd30] [c000000008184c60] SyS_finit_module+0xf0/0x170 [ 484.330463] [c00000001fe4fe30] [c00000000800bd84] system_call+0x38/0xe0 root@ubuntu:~# uname -a Linux ubuntu 4.9.0-15-generic #16-Ubuntu SMP Fri Jan 20 15:28:49 UTC 2017 ppc64le ppc64le ppc64le GNU/Linux root@ubuntu:~# cat /proc/cmdline BOOT_IMAGE=/boot/vmlinux-4.9.0-15-generic root=UUID=567520d7-270f-462e-9f0c-882c73bce0bc ro crashkernel=512M root@ubuntu:~# root@ubuntu:~# echo c > /proc/sysrq-trigger Regards Praveen > Resolution: Pass "noirqdistrib" to kdump kernel. > > Thanks wiki page at: https://wiki.ubuntu.com/ppc64el/Recommendations#Kdump_not_generating_crash_dump_file mirror this bug to Canonical for them to ensure "noirqdistrib" is passed in powerpc arch case.. ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Taco Screen team (taco-screen-team) Status: New ** Tags: architecture-ppc64le bugnameltc-151351 severity-critical targetmilestone-inin1704 -- In Ubuntu17.04 as Kvm guest : While trigger kdump console hung having call traces https://bugs.launchpad.net/bugs/1664545 You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux 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
