What is the difference between a kernel BUG and a kernel Oops?

What is the difference between a kernel BUG and a kernel Oops?

[hujun_hotmail]

I want to know what is the difference between a kernel BUG and a kernel Oops , who can tell me?

thanks.
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What is the difference between a kernel BUG and a kernel Oops?

[michi1 at michaelblizek.twilightparadox.com]

Hi!

On 17:38 Sat 03 Mar     , hujun_hotmail wrote:
> I want to know what is the difference between a kernel BUG and a kernel Oops , who can tell me?

A BUG() is something like an assertion. Basically this means that a developer
thought that a certain situation should never be happen and if it does,
execution should stop. It is possible to ignore this and continue executing:

config BUG
        bool "BUG() support" if EXPERT
        default y
        help
          Disabling this option eliminates support for BUG and WARN, reducing
          the size of your kernel image and potentially quietly ignoring
          numerous fatal conditions. You should only consider disabling this
          option for embedded systems with no facilities for reporting errors.
          Just say Y.

A kernel oops is basically a crash. This can be caused by bad memory accesses
and things like that.

	-Michi
-- 
programing a layer 3+4 network protocol for mesh networks
see http://michaelblizek.twilightparadox.com

What is the difference between a kernel BUG and a kernel Oops?

[hujun_hotmail]

very professional!

--------------------------------------------------
From: <michi1@michaelblizek.twilightparadox.com>
Sent: Saturday, March 03, 2012 6:55 PM
To: "hujun_hotmail" <duanshuidao@hotmail.com>
Cc: "newbies kenel" <kernelnewbies@kernelnewbies.org>
Subject: Re: What is the difference between a kernel BUG and a kernel Oops?

> Hi!
>
> On 17:38 Sat 03 Mar     , hujun_hotmail wrote:
>> I want to know what is the difference between a kernel BUG and a kernel 
>> Oops , who can tell me?
>
> A BUG() is something like an assertion. Basically this means that a 
> developer
> thought that a certain situation should never be happen and if it does,
> execution should stop. It is possible to ignore this and continue 
> executing:
>
> config BUG
>        bool "BUG() support" if EXPERT
>        default y
>        help
>          Disabling this option eliminates support for BUG and WARN, 
> reducing
>          the size of your kernel image and potentially quietly ignoring
>          numerous fatal conditions. You should only consider disabling 
> this
>          option for embedded systems with no facilities for reporting 
> errors.
>          Just say Y.
>
> A kernel oops is basically a crash. This can be caused by bad memory 
> accesses
> and things like that.
>
> -Michi
> -- 
> programing a layer 3+4 network protocol for mesh networks
> see http://michaelblizek.twilightparadox.com
>
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