On 7/5/25 02:17, Zi Yan wrote: > On 4 Jul 2025, at 9:52, Francois Dugast wrote: > >> Hi, >> >> On Fri, Mar 07, 2025 at 10:20:30AM +1100, Balbir Singh wrote: >>> On 3/7/25 10:08, Matthew Brost wrote: >>>> On Thu, Mar 06, 2025 at 03:42:28PM +1100, Balbir Singh 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-balb...@nvidia.com/.
Thanks Zi! Could you please try out the latest patches Francois? Balbir
