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 Uxmha2Ez 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wrote: >>>> >>>> This is an exciting series to see. As of today, we have just merged this >>>> series into the DRM subsystem / Xe [2], which adds very basic SVM >>>> support. One of the performance bottlenecks we quickly identified was >>>> the lack of THP for device pages—I believe our profiling showed that 96% >>>> of the time spent on 2M page GPU faults was within the migrate_vma_* >>>> functions. Presumably, this will help significantly. >>>> >>>> We will likely attempt to pull this code into GPU SVM / Xe fairly soon. >>>> I believe we will encounter a conflict since [2] includes these patches >>>> [3] [4], but we should be able to resolve that. These patches might make >>>> it into the 6.15 PR — TBD but I can get back to you on that. >>>> >>>> I have one question—does this series contain all the required core MM >>>> changes for us to give it a try? That is, do I need to include any other >>>> code from the list to test this out? >>>> >>> >>> Thank you, the patches are built on top of mm-everything-2025-03-04-05-51, which >>> includes changes by Alistair to fix fs/dax reference counting and changes >>> By Zi Yan (folio split changes), the series builds on top of those, but the >>> patches are not dependent on the folio split changes, IIRC >>> >>> Please do report bugs/issues that you come across. >>> >>> Balbir >>> >> >> Thanks for sharing. We used your series to experimentally enable THP migration >> of zone device pages in DRM GPU SVM and Xe. Here is an early draft [1] rebased >> on 6.16-rc1. It is still hacky but I wanted to share some findings/questions: >> - Is there an updated version of your series? > > Here is a new one: https://lore.kernel.org/linux-mm/20250703233511.2028395-1-balbirs@nvidia.com/. Thanks Zi! Could you please try out the latest patches Francois? Balbir