On Wed, Jan 17, 2018 at 09:19:56AM +0800, Liubo(OS Lab) wrote: > On 2018/1/17 5:30, Jerome Glisse wrote: > > I want to talk about status of HMM and respective upstream user for > > it and also talk about what's next in term of features/improvement > > plan (generic page write protection, mmu_notifier, ...). Most likely > > I don't think we should consider to push more code to upstream for a nobody-use feature. > > AFAIR, Michal also mentioned that HMM need a real user/driver before upstream. > But I haven't seen a workable user/driver version. > > Looks like HMM is a custom framework for Nvidia, and Nvidia would not like to open source its driver. > Even if nvidia really use HMM and open sourced its driver, it's probably the only user. > But the HMM framework touched too much core mm code. So it is not NVidia only, they are other GPU from different company that intend to use HMM, i can't comment any further on timeline. Regarding NVidia hardware i intend to have the patchset to use HMM inside nouveau ready before summit and post as RFC. Per drm sub-system guideline we can not upstream it until we also have a functional userspace stack and we are also working on that. Cheers, Jérôme -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
