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bug: l2 el2 opt?

jintack
Jul 25th, 2016
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  1. BUG: scheduling while atomic: qemu-system-aar/10754/0x00000002
  2. BUG: scheduling while atomic: qemu-system-aar/10754/0x00000000
  3. BUG: scheduling while atomic: qemu-system-aar/10759/0x00000002
  4. BUG: scheduling while atomic: qemu-system-aar/10759/0x00000000
  5. BUG: scheduling while atomic: qemu-system-aar/10754/0x00000002
  6. BUG: scheduling while atomic: qemu-system-aar/10754/0x00000000
  7. BUG: scheduling while atomic: qemu-system-aar/10759/0x00000002
  8. BUG: scheduling while atomic: qemu-system-aar/10759/0x00000000
  9. Unable to handle kernel NULL pointer dereference at virtual address 00000078
  10. pgd = ffff800fb2179000
  11. [00000078] *pgd=0000004fb21ff003, *pud=0000004fb4642003, *pmd=0000000000000000
  12. Internal error: Oops: 96000006 [#1] PREEMPT SMP
  13. Modules linked in:
  14. CPU: 0 PID: 10759 Comm: qemu-system-aar Tainted: G W 4.6.0-rc1+ #399
  15. Hardware name: HP ProLiant m400 Server Cartridge (DT)
  16. task: ffff800fafc88000 ti: ffff800f6eb58000 task.ti: ffff800f6eb58000
  17. PC is at pick_next_task_fair+0x19c/0x4ac
  18. LR is at pick_next_task_fair+0x198/0x4ac
  19. pc : [] lr : [] pstate: 600001c5
  20. sp : ffff800f6eb5b970
  21. x29: ffff800f6eb5b970 x28: ffff000008887000
  22. x27: ffff800fb7968000 x26: 0000000000000000
  23. x25: ffff0000088a5000 x24: ffff800fafc88c00
  24. x23: 0000000000000000 x22: 0000000000000000
  25. x21: ffff800ffff2d068 x20: ffff800ffff2d000
  26. x19: 0000000000000000 x18: 0000ffffed1b5e50
  27. x17: 0000ffffadcc6410 x16: ffff0000081bacf4
  28. x15: 003b9aca00000000 x14: 2b3163722d302e36
  29. x13: 2e34202020202020 x12: 0000000000000028
  30. x11: 0000000000000002 x10: 0000000000000001
  31. x9 : 00000000000001d4 x8 : ffff800ffff19068
  32. x7 : ffff800ffff19090 x6 : ffff000008658e60
  33. x5 : 0000000000000001 x4 : 00000000002a3933
  34. x3 : ffff000008909280 x2 : 0000000000000000
  35. x1 : 00000000000003d2 x0 : 00000002f5ac7a04
  36.  
  37. Process qemu-system-aar (pid: 10759, stack limit = 0xffff800f6eb58020)
  38. Stack: (0xffff800f6eb5b970 to 0xffff800f6eb5c000)
  39. b960: ffff800f6eb5ba00 ffff00000863b958
  40. b980: ffff800ffff2d000 ffff800fafc88550 ffff800fafc88000 ffff0000088a6000
  41. b9a0: ffff000008887000 ffff00000863be2c 0000000000000000 0000000000000001
  42. b9c0: ffff800fb7968000 ffff0000089052c8 ffff800f6eb5b9e0 ffff800fafc88c80
  43. b9e0: ffff000008887000 ffff800fafc88000 ffff800ffff2d000 ffff0000088a6000
  44. ba00: ffff800f6eb5ba50 ffff00000863be2c ffff800f6eb58000 ffff800faf968098
  45. ba20: 0000000000000001 0000284c13048422 0000000000000000 ffff0000088b3000
  46. ba40: ffff800f6eb5bb90 ffff00000809a664 ffff800f6eb5ba70 ffff00000809a740
  47. ba60: ffff800faf968000 0000000000000001 ffff800f6eb5bac0 ffff0000080a76d8
  48. ba80: ffff800faf968000 ffff800fb7968000 0000000000000001 ffff800faf969000
  49. baa0: ffff800fb7968000 ffff800fafc88000 ffff800f6eb5bab0 ffff800f6eb5bab0
  50. bac0: ffff800f6eb5bae0 ffff0000080a7780 ffff800faf968000 ffff800f080a95c0
  51. bae0: ffff800f6eb5bb10 ffff0000080a1ccc ffff800faf968000 ffff800f6eb58000
  52. bb00: ffff80086eb5b81b ffff0000080a95c0 ffff800f6eb5bba0 ffff00000809cc8c
  53. bb20: ffff800faf968000 ffff800fb7502d00 0000000000000000 ffff800fb1efbf00
  54. bb40: 0000000000000000 000000000000ae80 000000000000011e 000000000000001d
  55. bb60: ffff00000864b000 ffff800f6eb58000 ffff800faf968000 ffff0000089052e0
  56. bb80: fffffffe7ffbfeff ffff800fb75cc28c ffff000008887000 0000000000000001
  57. bba0: ffff800f6eb5be00 ffff0000081ba9f0 ffff800fb1efbf00 0000000000000000
  58. bbc0: ffff800fb7c06bf8 0000000000000013 0000000000000000 0000000000000000
  59. bbe0: 0000000000000001 000000000000ae80 ffff000008887000 00000000000001c0
  60. bc00: ffff0000088a6ce0 0000000000000000 ffff800f6eb5bc20 ffff0000080dd9e0
  61. bc20: ffff800f6eb5bc90 ffff0000080ddbd8 ffff800fb2341c78 ffff800fb2341c90
  62. bc40: 0000000000000001 0000000000000000 0000000000000003 0000000000000001
  63. bc60: 0000000000000000 0000000000000040 ffff00000864b000 0000000000000003
  64. bc80: ffff800f6eb5bcb0 0000000000000003 ffff800f6eb5bca0 ffff0000081bba08
  65. bca0: ffff800f6eb5bce0 ffff0000080eef68 ffff800f6eb5bd30 0000000000000000
  66. bcc0: ffff800fb75cbc00 ffff0000080ddbc8 0000000000000000 0000000000000000
  67. bce0: ffff800f6eb5bd30 ffff0000080eefdc ffff800fb2341c88 ffff800fb2341c80
  68. bd00: ffff800f6eb58000 ffff800f6eb5bd88 0000000000000008 0000000000000015
  69. bd20: 000000000000011e 00000000000005f8 ffff800f6eb5bd40 ffff0000081eb830
  70. bd40: ffff800f6eb5bdb0 ffff0000081a88e0 ffff800fb457bc00 ffff800f6eb5bec8
  71. bd60: ffff800f6eb5bec8 00000000008b2f50 0000000080000000 0000000000000062
  72. bd80: ffff800f6eb5be30 ffff0000081a9860 ffff800fb457bc00 0000000000000008
  73. bda0: ffff800fb7c06bf8 0000000000000002 ffff800fb457bc10 0000000000000015
  74. bdc0: 000000000000011e 0000000000000040 ffff00000864b000 ffff800f6eb58000
  75. bde0: 0000000000000008 ffff800fb457bc00 ffff800f6eb5be30 ffff0000081a9844
  76. be00: ffff800f6eb5be90 ffff0000081bb100 ffff800fb1efbf01 0000000000000000
  77. be20: ffff800fb1efbf00 0000000000000013 0000000000000000 ffff0000081aab04
  78. 5be90 ffff0000081bb0bc
  79. be60: ffff800fb1efbf01 0000000000f1cac0 ffff800fb1efbf00 0000000000000013
  80. be80: 0000000000000000 ffff0000081bb0a0 0000000000000000 ffff000008085e70
  81. bea0: 0000000000000000 0000000000f1cac0 ffffffffffffffff 0000ffff78ef448c
  82. bec0: 0000000060000000 0000000000000015 0000000000000013 000000000000ae80
  83. bee0: 0000000000000000 00000000ffffff80 0000ffff7520f4f0 0000000000000001
  84. bf00: 0000000000000002 0000000000000000 000000000000001d 0000000000940000
  85. bf20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
  86. bf40: 0000000000000000 0000ffff78f79590 00000000008d73d0 0000ffff78ef4480
  87. bf60: 0000ffffcfde8350 0000000000940000 0000000000f1cac0 0000000000000000
  88. bf80: 00000000009985f8 0000000000000001 0000000000f24ac0 0000ffff7520f6e0
  89. bfa0: 0000ffff77b096f0 0000000000800000 0000ffff78fa8000 0000ffff7520f3f0
  90. bfc0: 000000000045c9e8 0000ffff7520f3f0 0000ffff78ef448c 0000000060000000
  91. bfe0: 0000000000000013 000000000000001d 0000000000000000 0000000000000000
  92. Call trace:
  93. Exception stack(0xffff800f6eb5b7b0 to 0xffff800f6eb5b8d0)
  94. b7a0: 0000000000000000 ffff800ffff2d000
  95. b7c0: ffff800f6eb5b970 ffff0000080e9be0 ffff800fafc88000 0000000000000000
  96. b7e0: ffff000008082000 0000000000000000 ffff0000080826a0 ffff000008775ab0
  97. b800: ffff800fb7968000 ffff0000089052c8 ffff000008910080 ffff00000863be2c
  98. b820: 0000000000000000 0000000000000000 ffff000008775ab0 00000000089052c8
  99. b840: ffff800f6eb5b940 ffff800f6eb5b940 00000002f5ac7a04 00000000000003d2
  100. b860: 0000000000000000 ffff000008909280 00000000002a3933 0000000000000001
  101. b880: ffff000008658e60 ffff800ffff19090 ffff800ffff19068 00000000000001d4
  102. b8a0: 0000000000000001 0000000000000002 0000000000000028 2e34202020202020
  103. b8c0: 2b3163722d302e36 003b9aca00000000
  104. [] pick_next_task_fair+0x19c/0x4ac
  105. [] __schedule+0xe0/0x578
  106. [] schedule+0x3c/0xa0
  107. [] kvm_vcpu_block+0x94/0x170
  108. [] kvm_handle_wfx+0x44/0x98
  109. [] handle_exit+0x54/0x14c
  110. [] kvm_arch_vcpu_ioctl_run+0x410/0x5e4
  111. [] kvm_vcpu_ioctl+0x358/0x6cc
  112. [] do_vfs_ioctl+0xac/0x738
  113. [] SyS_ioctl+0x84/0x98
  114. [] el0_svc_naked+0x24/0x28
  115. Code: aa1503e0 aa1303e1 97fff79e f9403a73 (f9403f40)
  116. ---[ end trace 11fa7317f90ca366 ]---
  117. note: qemu-system-aar[10759] exited with preempt_count 2
  118. INFO: rcu_preempt self-detected stall on CPU
  119. 2-...: (1 ticks this GP) idle=1d9/1/0 softirq=315517/315517 fqs=1
  120. (t=5655 jiffies g=110692 c=110691 q=21)
  121. rcu_preempt kthread starved for 5638 jiffies! g110692 c110691 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x1
  122. rcu_preempt S ffff000008086c04 0 7 2 0x00000000
  123. Call trace:
  124. [] __switch_to+0xb4/0xdc
  125. [] __schedule+0x1b0/0x578
  126. [] schedule+0x3c/0xa0
  127. [] schedule_timeout+0x104/0x1a0
  128. [] rcu_gp_kthread+0x4b8/0x830
  129. [] kthread+0xd4/0xe8
  130. [] ret_from_fork+0x10/0x40
  131. Task dump for CPU 2:
  132. swapper/2 R running task 0 0 1 0x00000000
  133. Call trace:
  134. [] dump_backtrace+0x0/0x1ac
  135. [] show_stack+0x14/0x1c
  136. [] sched_show_task+0xa8/0xf4
  137. [] dump_cpu_task+0x40/0x4c
  138. [] rcu_dump_cpu_stacks+0x98/0xe4
  139. [] rcu_check_callbacks+0x4c4/0x95c
  140. [] update_process_times+0x3c/0x68
  141. [] tick_sched_handle.isra.15+0x3c/0x4c
  142. [] tick_sched_timer+0x44/0x7c
  143. [] __hrtimer_run_queues+0xe8/0x14c
  144. [] hrtimer_interrupt+0x9c/0x1e0
  145. [] arch_timer_handler_phys+0x2c/0x38
  146. [] handle_percpu_devid_irq+0x78/0x98
  147. [] generic_handle_irq+0x24/0x38
  148. [] __handle_domain_irq+0x60/0xac
  149. [] gic_handle_irq+0x5c/0xb0
  150. Exception stack(0xffff800fb80cfe30 to 0xffff800fb80cff50)
  151. fe20: 0000000000000000 0000000000000000
  152. fe40: ffff800ffff3cab8 ffff800ffff3cac4 0100000000000000 000002045a88930f
  153. fe60: 00000000007ffc66 0000284bb5433b30 ffff800fb80c14a0 ffff800fb80cc000
  154. fe80: 0000000000000840 ffff0000088b93b0 ffff0000088ba580 0000000000000000
  155. fea0: 0000000000000000 0000000000000000 ffff0000080becd0 0000aaaad3f71058
  156. fec0: 0000ffffd680c870 ffff0000088a6b0c 0000000000000e12 ffff0000088a6a78
  157. fee0: ffff800fb80cc000 ffff800fb80cc000 ffff800fb80cc000 ffff0000088ffb31
  158. ff00: 0000000000000001 ffff000008082850 00000000febeba6b ffff800fb80cff50
  159. ff20: ffff00000808677c ffff800fb80cff50 ffff000008086780 0000000060000145
  160. ff40: ffff0000088ffb31 ffff000008117eb4
  161. [] el1_irq+0xa0/0x10c
  162. [] arch_cpu_idle+0x10/0x18
  163. [] default_idle_call+0x18/0x28
  164. [] cpu_startup_entry+0x10c/0x140
  165. [] secondary_start_kernel+0x16c/0x1a0
  166. [<000000400008283c>] 0x400008283c
  167. INFO: rcu_preempt detected stalls on CPUs/tasks:
  168. (detected by 4, t=6340 jiffies, g=110692, c=110691, q=21)
  169. All QSes seen, last rcu_preempt kthread activity 6323 (4305975437-4305969114), jiffies_till_next_fqs=1, root ->qsmask 0x0
  170. swapper/4 R running task 0 0 1 0x00000000
  171. Call trace:
  172. [] dump_backtrace+0x0/0x1ac
  173. [] show_stack+0x14/0x1c
  174. [] sched_show_task+0xa8/0xf4
  175. [] rcu_check_callbacks+0x958/0x95c
  176. [] update_process_times+0x3c/0x68
  177. [] tick_sched_handle.isra.15+0x3c/0x4c
  178. [] tick_sched_timer+0x44/0x7c
  179. [] __hrtimer_run_queues+0xe8/0x14c
  180. [] hrtimer_interrupt+0x9c/0x1e0
  181. [] arch_timer_handler_phys+0x2c/0x38
  182. [] handle_percpu_devid_irq+0x78/0x98
  183. [] generic_handle_irq+0x24/0x38
  184. [] __handle_domain_irq+0x60/0xac
  185. [] gic_handle_irq+0x5c/0xb0
  186. Exception stack(0xffff800fb80d7e30 to 0xffff800fb80d7f50)
  187. 7e20: 0000000000000000 0000000000000000
  188. 7e40: ffff800ffff64ab8 ffff800ffff64ac4 0100000000000000 000002045f3e04cf
  189. 7e60: 00000000007ffcf0 0000284c13452aa4 ffff800fb80c2ca0 0000000100a7da81
  190. 7e80: 0000000000000840 0000000000004bf0 0000000000000000 0000000000200000
  191. 7ea0: 000000000000016d 0000000000000000 ffff0000080becd0 0000aaaaba559058
  192. 7ec0: 0000ffffef15ae10 ffff0000088a6b0c 0000000000000e12 ffff0000088a6a78
  193. 7ee0: ffff800fb80d4000 ffff800fb80d4000 ffff800fb80d4000 ffff0000088ffb31
  194. 7f00: 0000000000000001 ffff000008082850 3fefd7fabdef7fb7 ffff800fb80d7f50
  195. 7f20: ffff00000808677c ffff800fb80d7f50 ffff000008086780 0000000060000145
  196. 7f40: ffff0000088ffb31 ffff000008117eb4
  197. [] el1_irq+0xa0/0x10c
  198. [] arch_cpu_idle+0x10/0x18
  199. [] default_idle_call+0x18/0x28
  200. [] cpu_startup_entry+0x10c/0x140
  201. [] secondary_start_kernel+0x16c/0x1a0
  202. [<000000400008283c>] 0x400008283c
  203. rcu_preempt kthread starved for 6438 jiffies! g110692 c110691 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x100
  204. rcu_preempt W ffff000008086c04 0 7 2 0x00000000
  205. Call trace:
  206. [] __switch_to+0xb4/0xdc
  207. [] __schedule+0x1b0/0x578
  208. [] schedule+0x3c/0xa0
  209. [] schedule_timeout+0x104/0x1a0
  210. [] rcu_gp_kthread+0x4b8/0x830
  211. [] kthread+0xd4/0xe8
  212. [] ret_from_fork+0x10/0x40
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