海思3519v101在抓取proc调试信息时出错_问答

在抓取mpp调试信息时，出现堆栈错误的问题，请问这是怎么回事[code]~ # cat /proc/umap/vi
INFO: rcu_sched self-detected stall on CPU { 1} (t=6000 jiffies g=547 c=546 q=6106)
Task dump for CPU 1:
cat R running 0 368 347 0x00000002
[] (unwind_backtrace) from [] (show_stack+0x10/0x14)
[] (show_stack) from [] (rcu_dump_cpu_stacks+0x94/0xd4)
[] (rcu_dump_cpu_stacks) from [] (rcu_check_callbacks+0x3c4/0x664)
[] (rcu_check_callbacks) from [] (update_process_times+0x40/0x60)
[] (update_process_times) from [] (tick_nohz_handler+0xac/0x120)
[] (tick_nohz_handler) from [] (arch_timer_handler_phys+0x28/0x30)
[] (arch_timer_handler_phys) from [] (handle_percpu_devid_irq+0x6c/0x84)
[] (handle_percpu_devid_irq) from [] (generic_handle_irq+0x2c/0x3c)
[] (generic_handle_irq) from [] (__handle_domain_irq+0x5c/0xa4)
[] (__handle_domain_irq) from [] (gic_handle_irq+0x24/0x78)
[] (gic_handle_irq) from [] (__irq_svc+0x40/0x54)
Exception stack(0xc1d0fe20 to 0xc1d0fe68)
fe20: c1f66600 00000000 00000000 00000000 c1d49800 00000000 00000001 c1084300
fe40: c1d0ff88 c1d0ff10 00001000 c1f66600 c10e0fc0 c1d0fe68 bf13b014 bf13b010
fe60: a0000013 ffffffff
[] (__irq_svc) from [] (ViuProcShow+0x1c/0xa60 [hi3519v101_viu])
[] (ViuProcShow [hi3519v101_viu]) from [] (osal_seq_show+0x20/0x44 [hi_osal])
[] (osal_seq_show [hi_osal]) from [] (seq_read+0x1ec/0x484)
[] (seq_read) from [] (proc_reg_read+0x5c/0x84)
[] (proc_reg_read) from [] (vfs_read+0x8c/0x14c)
[] (vfs_read) from [] (SyS_read+0x44/0x9c)
[] (SyS_read) from [] (ret_fast_syscall+0x0/0x38)[/code]

海思3519v101在抓取proc调试信息时出错

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