On Wed, May 24, 2017 at 11:55:12AM +1000, Balbir Singh wrote: > On Tue, May 23, 2017 at 2:51 AM, Jérôme Glisse <jglisse@xxxxxxxxxx> wrote: > > Patchset is on top of mmotm mmotm-2017-05-18, git branch: > > > > https://cgit.freedesktop.org/~glisse/linux/log/?h=hmm-v22 > > > > Change since v21 is adding back special refcounting in put_page() to > > catch when a ZONE_DEVICE page is free (refcount going from 2 to 1 > > unlike regular page where a refcount of 0 means the page is free). > > See patch 8 of this serie for this refcounting. I did not use static > > keys because it kind of scares me to do that for an inline function. > > If people strongly feel about this i can try to make static key works > > here. Kirill will most likely want to review this. > > > > > > Everything else is the same. Below is the long description of what HMM > > is about and why. At the end of this email i describe briefly each patch > > and suggest reviewers for each of them. > > > > > > Heterogeneous Memory Management (HMM) (description and justification) > > > > Thanks for the patches! These patches are very helpful. There are a > few additional things we would need on top of this (once HMM the base > is merged) > > 1. Support for other architectures, we'd like to make sure we can get > this working for powerpc for example. As a first step we have > ZONE_DEVICE enablement patches, but I think we need some additional > patches for iomem space searching and memory hotplug, IIRC > 2. HMM-CDM and physical address based migration bits. In a recent RFC > we decided to try and use the HMM CDM route as a route to implementing > coherent device memory as a starting point. It would be nice to have > those patches on top of these once these make it to mm - > https://lwn.net/Articles/720380/ > I intend to post the updated HMM CDM patchset early next week. I am tie in couple internal backport but i should be able to resume work on that this week. 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>
