On Wed, Mar 06, 2024 at 10:51:10AM -0500, Johannes Weiner wrote: > This is a very interesting topic to me. Meta has collaborated with CMU > to research this as well, the results of which are typed up here: > https://dl.acm.org/doi/pdf/10.1145/3579371.3589079 > > > I would like to be part of it, and would also suggest to have Kaiyang > (CC'd) in the room, who is the primary researcher on the Contiguitas > paper referenced above. Thanks for bringing up Contiguitas, Johannes. Providing a large amount of physical memory contiguity and managing it as a first-class resource is very important for bringing a lot of research in virtual memory into reality. Johannes has already touched upon many parts of the kernel changes we made in the Contiguitas project. To summarize, we want to confine the unmovable allocations in a separate region in the physical address space so that later memory contiguity can be obtained by successfully doing compaction, and provide the ability to dynamically size the unmovable region to adapt to changing workload characteristics and avoid static sizing. I will send an RFC with patches soon. Dimitrios (cc’d) and I are interested in joining this effort and finding the best approach to achieve our shared goal of more and easier-to-manage physical contiguity.
