From: Frederic Weisbecker <fweisbec@gmail.com>
To: Huang Ying <ying.huang@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>,
LKML <linux-kernel@vger.kernel.org>, LKP ML <lkp@01.org>,
Steven Rostedt <rostedt@goodmis.org>,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: [LKP] [sched] BUG: kernel boot hang
Date: Sun, 15 Feb 2015 16:38:36 +0100 [thread overview]
Message-ID: <20150215153833.GB8838@lerouge> (raw)
In-Reply-To: <1423986208.5538.5.camel@intel.com>
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.
next prev parent reply other threads:[~2015-02-15 15:38 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-15 7:43 Huang Ying
2015-02-15 15:31 ` Frederic Weisbecker
2015-02-15 15:38 ` Frederic Weisbecker [this message]
2015-02-15 15:46 ` Frederic Weisbecker
2015-02-15 18:18 ` Steven Rostedt
2015-02-16 15:07 ` Peter Zijlstra
2015-02-16 18:22 ` Frederic Weisbecker
2015-02-16 18:34 ` Steven Rostedt
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