1 Reply Latest reply: Mar 12, 2013 8:38 AM by 996160 RSS

    Oracle Linux VM halts with [kernel: alignment check: 0000 [#1] SMP] fault

    Stevedennis-Oracle
      IHAC with a number of Oracle Linux 5 U6 (2.6.32-300.25.1.el5uek) virtual machines running on an OVM 2.2.2 (2.6.18-128.2.1.4.37.el5xen) server farm.

      One of the systems crashed / halted overnight with the following error message in the logs: -

      Aug 14 16:25:22 fadvmdml1 ntpd[2217]: kernel time sync enabled 0001
      Aug 14 18:58:56 fadvmdml1 ntpd[2217]: kernel time sync enabled 4001
      Aug 14 19:12:13 fadvmdml1 kernel: alignment check: 0000 [#1] SMP
      Aug 14 19:12:13 fadvmdml1 kernel: last sysfs file: /sys/class/net/eth4/broadcast
      Aug 14 19:12:13 fadvmdml1 kernel: CPU 1
      Aug 14 19:12:13 fadvmdml1 kernel: Modules linked in: nfs(U) fscache(U) nfs_acl(U) auth_rpcgss(U) ipv6(U) i2c_dev(U) i2c_core(U) hidp(U) l2cap(U) bluetooth(U) rfkill(U) lockd(U) sunrpc(U) parport_pc(U) lp(U) parport(U) snd_seq_dummy(U) snd_seq_oss(U) snd_seq_midi_event(U) snd_seq(U) snd_seq_device(U) snd_pcm_oss(U) snd_mixer_oss(U) joydev(U) snd_pcm(U) snd_timer(U) snd(U) soundcore(U) snd_page_alloc(U) xen_netfront(U) pcspkr(U) xen_blkfront(U) Aug 14 19:12:13 fadvmdml1 kernel: Pid: 31504, comm: httpd Not tainted 2.6.32-300.25.1.el5uek #1
      Aug 14 19:30:15 fadvmdml1 syslogd 1.4.1: restart.
      Aug 14 19:30:15 fadvmdml1 kernel: klogd 1.4.1, log source = /proc/kmsg started.
      Aug 14 19:30:15 fadvmdml1 kernel: Initializing cgroup subsys cpuset
      Aug 14 19:30:15 fadvmdml1 kernel: Initializing cgroup subsys cpu
      Aug 14 19:30:15 fadvmdml1 kernel: Linux version 2.6.32-300.25.1.el5uek (mockbuil
      d@ca-build56.us.oracle.com) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-50)) #1 SMP Tue May 15 19:55:50 EDT 2012

      Until last night the OVM server farm and OL virtual machines had been quite stable.

      Has anyone come across this fault before? Does it relate to the VM kernel , or the OVS kernel??

      Many thanks,


      Steve Dennis
        • 1. Re: Oracle Linux VM halts with [kernel: alignment check: 0000 [#1] SMP] fault
          996160
          Hi Steve,

          I've had the same problem on a production server I support, with almost exactly the same symptoms. Did you get any resolution to this problem?

          Mar 8 13:06:51 kmebsprd kernel: alignment check: 0000 [#1] SMP
          Mar 8 13:06:51 kmebsprd kernel: last sysfs file: /sys/class/misc/autofs/dev
          Mar 8 13:06:51 kmebsprd kernel: CPU 1
          Mar 8 13:06:51 kmebsprd kernel: Modules linked in: autofs4(U) i2c_dev(U) i2c_core(U) nfs(U) fscache(U) nfs_acl(U) auth_rpcgss(U) lockd(U) sunrpc(U) ipv6(U) ovmapi(U) parport_pc(U) lp(U) parport(U) snd_seq_dummy(U) snd_seq_oss(U) snd_seq_midi_event(U) snd_seq(U) snd_seq_device(U) snd_pcm_oss(U) snd_mixer_oss(U) snd_pcm(U) snd_timer(U) snd(U) soundcore(U) snd_page_alloc(U) pcspkr(U) joydev(U) xen_netfront(U) xen_blkfront(U)
          Mar 8 13:06:51 kmebsprd kernel: Pid: 18260, comm: httpd Not tainted 2.6.32-300.21.1.el5uek #1
          Mar 8 13:06:51 kmebsprd kernel: RIP: e030:[<ffffffff81019e52>] [<ffffffff81019e52>] convert_from_fxsr+0x121/0x140
          Mar 8 13:06:51 kmebsprd kernel: RSP: e02b:ffff880187fe3cf0 EFLAGS: 00050202
          Mar 8 13:06:51 kmebsprd kernel: RAX: ffff88036ecc0220 RBX: ffff88036ecc0220 RCX: ffff880187fe3d34

          Thanks Chris Kearns