On 08.07.2025 14:06, Leon Romanovsky wrote: > On Tue, Jul 08, 2025 at 01:45:20PM +0200, Marek Szyprowski wrote: >> On 08.07.2025 13:00, Leon Romanovsky wrote: >>> On Tue, Jul 08, 2025 at 12:27:09PM +0200, Marek Szyprowski wrote: >>>> On 30.06.2025 15:38, Christoph Hellwig wrote: >>>>> On Fri, Jun 27, 2025 at 08:02:13PM +0300, Leon Romanovsky wrote: >>>>>>> Thanks for this rework! I assume that the next step is to add map_phys >>>>>>> callback also to the dma_map_ops and teach various dma-mapping providers >>>>>>> to use it to avoid more phys-to-page-to-phys conversions. >>>>>> Probably Christoph will say yes, however I personally don't see any >>>>>> benefit in this. Maybe I wrong here, but all existing .map_page() >>>>>> implementation platforms don't support p2p anyway. They won't benefit >>>>>> from this such conversion. >>>>> I think that conversion should eventually happen, and rather sooner than >>>>> later. >>>> Agreed. >>>> >>>> Applied patches 1-7 to my dma-mapping-next branch. Let me know if one >>>> needs a stable branch with it. >>> Thanks a lot, I don't think that stable branch is needed. Realistically >>> speaking, my VFIO DMA work won't be merged this cycle, We are in -rc5, >>> it is complete rewrite from RFC version and touches pci-p2p code (to >>> remove dependency on struct page) in addition to VFIO, so it will take >>> time. >>> >>> Regarding, last patch (hmm), it will be great if you can take it. >>> We didn't touch anything in hmm.c this cycle and have no plans to send PR. >>> It can safely go through your tree. >> Okay, then I would like to get an explicit ack from Jérôme for this. > Jerome is not active in HMM world for a long time already. > HMM tree is managed by us (RDMA) > https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git/log/?h=hmm > ➜ kernel git:(m/dmabuf-vfio) git log --merges mm/hmm.c > ... > Pull HMM updates from Jason Gunthorpe: > ... > > https://web.git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=58ba80c4740212c29a1cf9b48f588e60a7612209 > +hmm git > git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git#hmm > > We just never bothered to reflect current situation in MAINTAINERS file.
Maybe this is the time to update it :) I was just a bit confused that no-one commented the HMM patch, but if You maintain it, then this is okay. Best regards -- Marek Szyprowski, PhD Samsung R&D Institute Poland
