Re: [PATCH] mm/vmstat: Add events for PMD based THP migration without split

[Matthew Wilcox]

On Fri, May 22, 2020 at 09:04:04AM +0530, Anshuman Khandual wrote:
> This adds the following two new VM events which will help in validating PMD
> based THP migration without split. Statistics reported through these events
> will help in performance debugging.
> 
> 1. THP_PMD_MIGRATION_SUCCESS
> 2. THP_PMD_MIGRATION_FAILURE

There's nothing actually PMD specific about these events, is there?
If we have a THP of a non-PMD size, you'd want that reported through the
same statistic, wouldn't you?