Thanks for helping,

:)

I think that you seem to do some testing with these patches on powerpc,
which shows that thp migration can be enabled relatively easily for
non-x86_64. This is a good news to me.

Right. I did some THP migration tests on both x86_64 and IBM ppc64.

You can use the code here to test the THP migration,
and compare the migration time between 512 base pages and 1 THP.
https://github.com/x-y-z/thp-migration-bench

NUMA (or fake NUMA) setup and libnuma are needed. Since it simply tries to
migrate pages from node 0 to node 1.

make bench should give you the result like:

THP Migration
Total time: 676.870346 us
Test successful.
-------------------
Base Page Migration
Total time: 2340.078354 us
Test successful.

And I apology for my slow development over this patchset.
My previous post was about 5 months ago, and I've not done ver.2 due to
many interruptions. Someone also privately asked me about the progress
of this work, so I promised ver.2 will be posted in a few weeks.
Your patch 12/12 will come with it.

Looking forward to it. :)

—
Best Regards,
Yan Zi