Hi, I just simply change the config file to avoid this. I also have noticed that other branches were fine. I think git-bisect can find the buggy commit easily. I'm too busy these days, or I will report it more hard.
----- Reply message ----- 发件人： "Takahiro Akashi" takahiro.akashi@linaro.org 收件人： "Zhizhou Zhang (张治洲)" Zhizhou.Zhang@spreadtrum.com 抄送： "linaro-android@lists.linaro.org" linaro-android@lists.linaro.org, "linaro-kernel@lists.linaro.org" linaro-kernel@lists.linaro.org, "Mark Brown" broonie@linaro.org 主题： kernel crush because of CONFIG_PREEMPT 日期： 周五, 10月 3 日, 2014 年 10:45
Cc: Mark
I reproduced this problem with the latest branch on armv8 fast model. But it is not a page fault, but:
Freeing unused kernel memory: 236K (ffffffc000592000 - ffffffc0005cd000) BUG: scheduling while atomic: init/1/0x00000002 Modules linked in: CPU: 0 PID: 1 Comm: init Not tainted 3.10.55+ #4 Call trace: [<ffffffc000088354>] dump_backtrace+0x0/0x130 [<ffffffc000088494>] show_stack+0x10/0x1c [<ffffffc000413514>] dump_stack+0x1c/0x28 [<ffffffc0000c6dbc>] __schedule_bug+0x48/0x5c [<ffffffc0004157b0>] __schedule+0x54c/0x63c [<ffffffc0004158c4>] schedule+0x24/0x68 [<ffffffc000413b54>] schedule_timeout+0x194/0x214 [<ffffffc000414fd4>] wait_for_common+0xa4/0x14c [<ffffffc00041508c>] wait_for_completion+0x10/0x1c [<ffffffc0000f8fec>] stop_one_cpu+0x44/0x68 [<ffffffc0000c96e0>] sched_exec+0xa0/0xcc [<ffffffc00016d2e0>] do_execve_common.isra.32+0x1a4/0x4ac [<ffffffc00016d600>] do_execve+0x18/0x24 [<ffffffc00040d538>] kernel_init+0x12c/0x140 Kernel panic - not syncing: No init found. Try passing init= option to kernel. See Linux Documentation/init.txt for guidance.
- Takahiro AKASHI
On 23 September 2014 18:35, Zhizhou Zhang (张治洲) <Zhizhou.Zhang@spreadtrum.commailto:Zhizhou.Zhang@spreadtrum.com> wrote:
Hello Guys,
I'm using branch linux-linaro-lsk-android on lsk(https://git.linaro.org/kernel/linux-linaro-stable.git). My arch is armv8.
When I config CONFIG_PREEMPT, The system panic.
It says "Failed to execute /init". I digged into it and found there was a page fault in atomic path.
And When config CONFIG_PREEMPT_VOLUNTARY or CONFIG_PREEMPT_NONE, it looks well.
Does anyone encounter this situation?
-- Zhizhou
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