ARM的内核糟糕页面错误错误代码 [英] Kernel Oops page fault error codes for ARM

问题描述

在Oops提供有关arm ex恐慌的信息后，错误代码是什么? Oops: 17 [#1] PREEMPT SMP 在这种情况下，什么17提供信息. 在x86中，它表示-

What does error code after Oops give information about the panic in arm ex. Oops: 17 [#1] PREEMPT SMP what 17 give information in this case. In x86 it represents -

• bit 0 == 0: no page found 1: protection fault

bit 1 == 0: read access 1: write access

bit 2 == 0: kernel-mode access 1: user-mode access

bit 3 == 1: use of reserved bit detected

但是我无法找到任何信息.

But i am not able to find any information in arm.

谢谢 雄风

推荐答案

您在上面作为位描述打印的是页面错误描述，而不是Oops错误.

What you printed above as description of bits is page fault descriptions, not Oops faults.

参见Linux的

See Linux's oops-tracing for more information on looking for Linux crash analysis.

以下是您的Oops: 17 [#1] PREEMPT SMP arch/arm/kernel/traps.c :

    #define S_PREEMPT " PREEMPT"
    ...
    #define S_SMP " SMP"
    ...
    printk(KERN_EMERG "Internal error: %s: %x [#%d]" S_PREEMPT S_SMP S_ISA "\n", str, err, ++die_counter);

页面错误不需要使内核崩溃，也不是所有的内核崩溃都是页面错误.因此，很有可能Oops: 17与页面错误完全无关. (还有一个好处是，我的疯狂猜测是关于安排时间/对我来说听起来很熟悉.)

Page faults doesn't need to crash the kernel, as well as not all kernel crashes are page faults. So there is a high chance Oops: 17 is not related to page faults at all. (and as a bonus my wild guess is it is about scheduling / just sounds familiar to me.)

这篇关于ARM的内核糟糕页面错误错误代码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！