On Fri, Jan 15, 2021 at 12:05:29PM -0800, Mike Kravetz wrote:

I went back and took a closer look.  Migration is the reason the existing
page_huge_active interfaces were introduced.  And, the only use of the
page_huge_active check is to determine if a page can be migrated.  So,
I think 'Migratable' may be the most suitable name.

Ok, I did not know that. Let us stick with 'Migratable' then.

To address the concern about not all hugetlb sizes are migratable, we can
just make a check before setting the flag.  This should even help in the
migration/offline paths as we will know sooner if the page can be
migrated or not.

This sounds like a good idea to me.

We can address naming in the 'migrating free hugetlb pages' issue when
that code is written.

Sure, it was just a suggestion as when I though about that something
like 'InUse' or 'Active' made more sense to me, but your point is valid.

Sorry for the confusion.

About that alloc_contig_range topic, I would like to take a look unless
someone is already on it or about to be.

Thanks Mike for the time ;-)


-- 
Oscar Salvador
SUSE L3