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SubjectRe: [LKP] [sched] BUG: kernel boot hang
On Sun, Feb 15, 2015 at 03:43:28PM +0800, Huang Ying wrote:
> FYI, we noticed the below changes on
>
> commit a18b5d01819235629289212ad428a5ee2b40f0d9 ("sched: Fix missing preemption opportunity")
>
>
> +------------------------------------------+------------+------------+
> | | 80e3d87b2c | a18b5d0181 |
> +------------------------------------------+------------+------------+
> | boot_successes | 75 | 0 |
> | boot_failures | 0 | 52 |
> | BUG:unable_to_handle_kernel | 0 | 32 |
> | Oops | 0 | 32 |
> | RIP:rb_reserve_next_event | 0 | 2 |
> | Kernel_panic-not_syncing:Fatal_exception | 0 | 32 |
> | RIP:ftrace_push_return_trace | 0 | 29 |
> | BUG:kernel_boot_hang | 0 | 17 |
> | BUG:Function_graph_tracer_hang | 0 | 1 |
> | PANIC:double_fault | 0 | 1 |
> | RIP:trace_graph_entry | 0 | 1 |
> | RIP:show_stack_log_lvl | 0 | 1 |
> | BUG:kernel_boot_crashed | 0 | 3 |
> +------------------------------------------+------------+------------+
>
> [ 0.572050] Testing tracer wakeup_dl:
> [ 0.572050] Testing tracer wakeup_dl: PASSED
> PASSED
> [ 0.636050] Testing tracer function_graph:
> [ 0.636050] Testing tracer function_graph:
>
> [ 0.648264] BUG: unable to handle kernel
> [ 0.648264] BUG: unable to handle kernel paging requestpaging request at 00000000000013cc
> at 00000000000013cc
> [ 0.649716] IP:
> [ 0.649716] IP: [<ffffffff81113a51>] ftrace_push_return_trace+0xa3/0x11b
> [<ffffffff81113a51>] ftrace_push_return_trace+0xa3/0x11b

Probably I should annotate preempt_schedule_common() as __sched. I'll test that.


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