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[Qemu-devel] [Bug 912612] Re: rhel5u5 guest panic when booting up


From: Yongjie Ren
Subject: [Qemu-devel] [Bug 912612] Re: rhel5u5 guest panic when booting up
Date: Fri, 03 Feb 2012 03:22:14 -0000

** Changed in: qemu
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/912612

Title:
  rhel5u5 guest panic when booting up

Status in QEMU:
  Fix Released

Bug description:
  Environment:
  ------------
  Host OS (ia32/ia32e/IA64): ia32e
  Guest OS (ia32/ia32e/IA64): ia32e
  Guest OS Type (Linux/Windows): Linux(rhel5u5)
  kvm.git Commit:781f306789361d671187d9ddb518eea3ffda786a
  qemu-kvm Commit:2850e9e3d3119f98ff775a75503b2153836c7475
  Host Kernel Version:3.2.0-rc7
  Hardware: Westmere-EP

  
  Bug detailed description:
  --------------------------
  rhel5u5 guest panic when booting up in the latest kvm upstream.
  When I tried rhel6u1 as a guest, I didn't met the guest panic issue.
  This should be a kvm kernel bug.
  kvm      +      qemu-kvm   =  result
  781f3067 + 2850e9e3   =  bad 
  08a95a51 + 2850e9e3   =  good

  guest panic serial log is attached.

  
  Reproduce steps:
  ----------------
  1.start up a host with kvm (commit:781f3067)
  2.qemu-system-x86_64 -mem 512 -hda /root/rhel5u5.img

  Current result:
  ----------------
  guest panic

  Expected result:
  ----------------
  guest boot up correctly

  Basic root-causing log:
  ----------------------
  SMP alternatives: switching to UP code
  Freeing SMP alternatives: 32k freed
  ACPI: Core revision 20060707
  general protection fault: 0000 [1] SMP
  last sysfs file:
  CPU 0
  Modules linked in:
  Pid: 1, comm: swapper Not tainted 2.6.18-194.el5 #1
  RIP: 0010:[<ffffffff8007f1df>]  [<ffffffff8007f1df>]
  setup_p6_watchdog+0x2f/0x7a
  RSP: 0000:ffff81000114be50  EFLAGS: 00000246
  RAX: 0000000000130079 RBX: 0000000000000186 RCX: 0000000000000186
  RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000003e8
  RBP: 0000000000090000 R08: 0000000000000000 R09: 0000000000000000
  R10: 0000000000000000 R11: 0000000000000000 R12: ffff8100010353e8
  R13: 00000000000000c1 R14: 0000000000000000 R15: 0000000000000000
  FS:  0000000000000000(0000) GS:ffffffff803cb000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
  CR2: 0000000000000000 CR3: 0000000000201000 CR4: 00000000000006e0
  Process swapper (pid: 1, threadinfo ffff81000114a000, task ffff81001fd3e7a0)
  Stack:  00000000000003e8 0000000000000000 00000000000000ff ffffffff8007efcf
   ffffffff8043e288 ffffffff800795d1 0000000000000800 ffffffff80078e9a
   0000000000000800 ffffffff80411712 0000000000090000 0000000000000800
  Call Trace:
   [<ffffffff8007efcf>] lapic_watchdog_init+0x1b/0x3c
   [<ffffffff800795d1>] setup_apic_nmi_watchdog+0x42/0x8a
   [<ffffffff80078e9a>] setup_local_APIC+0x17b/0x187
   [<ffffffff80411712>] smp_prepare_cpus+0x34a/0x360
   [<ffffffff804078c5>] init+0x62/0x2f7
   [<ffffffff8005efb1>] child_rip+0xa/0x11
   [<ffffffff801824cc>] acpi_ds_init_one_object+0x0/0x80
   [<ffffffff80407863>] init+0x0/0x2f7
   [<ffffffff8005efa7>] child_rip+0x0/0x11

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