On 06/10/2023 21:06, David Hildenbrand wrote: > On 29.09.23 13:44, Ryan Roberts wrote: >> Hi All, > [...] >> NOTE: These changes should not be merged until the prerequisites are complete. >> These are in progress and tracked at [7]. > > We should probably list them here, and classify which one we see as strict a > requirement, which ones might be an optimization. > Bringing back the discussion of prerequistes to this thread following the discussion at the mm-alignment meeting on Wednesday. Slides, updated following discussion to reflect all the agreed items that are prerequisites and enhancements, are at [1]. I've taken a closer look at the situation with khugepaged, and can confirm that it does correctly collapse anon small-sized THP into PMD-sized THP. I did notice though, that one of the khugepaged selftests (collapse_max_ptes_none) fails when small-sized THP is enabled+always. So I've fixed that test up and will add the patch to the next version of my series. So I believe the khugepaged prerequisite can be marked as done. [1] https://drive.google.com/file/d/1GnfYFpr7_c1kA41liRUW5YtCb8Cj18Ud/view?usp=sharing&resourcekey=0-U1Mj3-RhLD1JV6EThpyPyA Thanks, Ryan
