Hi, Pingfan
Thank you for the update.
> This bug connects with kernel commit 7bc1a0f9e176 ("arm64: mm: use> single
> quantity to represent the PA to VA translation"), memstart_addr> can be
> negative, which makes it different from real phys_offset. If> using
> memstart_addr to calculate the real paddr, the unreasonable paddr> will be
> got.
> Furthermore, in crash utility, PTOV() needs memstart_addr to calculate> VA
> from PA, while getting PFN offset in a dumpfile, phys_offset is> required.
As you mentioned above, the calculation formula has been changed, how to
deal with the backward compatibility issue? Should we use kernel version
to determine which code branch it should execute? Please correct me if I
was wrong.
Thanks.
Lianbo
> To serve the different purpose, using phys_offset_nominal and>
phys_offset to store them.
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