2012/12/7 Andrew Morton [off-list ref]:

On Fri,  7 Dec 2012 01:09:27 +0900
Joonsoo Kim [off-list ref] wrote:

quoted

I'm not sure that "7/8: makes vmlist only for kexec" is fine.
Because it is related to userspace program.
As far as I know, makedumpfile use kexec's output information and it only
need first address of vmalloc layer. So my implementation reflect this
fact, but I'm not sure. And now, I don't fully test this patchset.
Basic operation work well, but I don't test kexec. So I send this
patchset with 'RFC'.

Yes, this is irritating.  Perhaps Vivek or one of the other kexec
people could take a look at this please - if would obviously be much
better if we can avoid merging [patch 7/8] at all.

I'm not sure, but I almost sure that [patch 7/8] have no problem.
In kexec.c, they write an address of vmlist and offset of vm_struct's
address field.
It imply that user for this information doesn't have any other
information about vm_struct,
and they can't use other field of vm_struct. They can use *only* address field.
So, remaining just one vm_struct for vmlist which represent first area
of vmalloc layer
may be safe.

But, kexec people may be very helpful to validate this patch.

Thanks.

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