[PATCH 1/2] kexec: add a dummy note for each offline cpu

Liu ping fan kernelfans at gmail.com
Wed Dec 14 01:13:06 PST 2016

>> No. This patch just place a mark on these offline cpu. The next patch
>> for capture kernel will recognize this case, and ignore this kind of
>> pt_note by the code:
>> real_sz = 0; // although the size of this kind of PT_NOTE is not zero,
>> but it contains nothing useful, so just ignore it
>> phdr_ptr->p_memsz = real_sz
> If there is any other vmcore functional issue besides throwing "Warning: Zero PT_NOTE entries found"?
Not at present when I debugged.
I just think we can not suppose the behaviour of different archs, so
just mark out the dummy pt_note. If some archs want to use these notes
they will just overwrite the dummy.


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