[Crash-utility] question on some command params

[Jun Koi]

On Wed, Sep 24, 2008 at 10:25 PM, Dave Anderson <anderson at redhat.com> wrote:
> Jun Koi wrote:
>>
>> On Tue, Sep 23, 2008 at 12:49 AM, Dave Anderson <anderson at redhat.com>
>> wrote:
>> ..
>>
>>> zero_excluded: if a page was excluded by diskdump or makedumpfile,
>>> it normally returns a failure if the page is accessed.  If you
>>> want it to just return a page of zeroes, use --zero_excluded.
>>>
>>
>>
>> This option sounds reasonable to me, so why it is not enable by default??
>>
>
> I don't have a pointer to the discussion we had about this
> issue a long time ago (you can search the archives), but the
> consensus was that the user should be aware if an attempt is
> made to read an excluded page.
>
> The whole point behind excluded pages is that no pages that
> are crucial to the running of the crash utility should *ever*
> be excluded.  And if they do get excluded, then the diskdump
> and/or makedumpfile facilities should be fixed.
>
> But if you want to read a page of memory, and not even know
> or care whether it's legitimate data, then you can certainly use
> the command line argument.  But I don't know why you would want
> to?
>

I am just curious, because I think I want to simulate all the process
done by a live system. But it is logical that users should be aware
about the problem raised when an excluded page is accessed.

Thanks,
J
> Dave
>
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