Hello, I'd like to attend this year LSF/MM summit. Possible topics that I would suggest are: o the userfaultfd syscall has been merged upstream and it's feature complete for KVM postcopy live migration (available in current upstream QEMU). The extension to provide the write tracking feature to userfaultfd was planned from the start and an implementation has already been posted. The current implementation works fine for simple cases but it's not fully complete yet (no mmu notifier, THP not working etc..). The API of the new ioctls for the write protection feature should be finalized before this can be merged in -mm/upstream and the summit would be a good opportunity to discuss it. By April I expect a fully functional implementation of the new feature would become available. The topic to extend the userfaultfd syscalls to hugetlbfs has already been proposed. I'm interested about following up that too and not just to hugetlbfs but in general to extend it to more filebacked vmas types. o KSMscale: a change needed to reduce the worst case computational complexity of KSM is pending. This is needed to avoid long (as in seconds) CPU stalls in the rmap_walks (or alternatively the random materialization of unmovable pages anywhere in the physical ranges of supposedly movable memblocks and movable zones) on systems with larges amount of RAM and/or with dense workloads like clear containers. Perhaps by April this will already have been fully sorted out online and the patch will be already upstream, in which case this topic would be obsolete and should be skipped, but if not, I'd be nice to discuss this too. o TLB flushing reduction in the rmap_walks: Mel and Hugh started various work in this area. Patches have been posted for a certain number of cases but it'd be good if we could optimize things for secondary MMUs (i.e. KVM MMU notifiers) too and for more cases. Last but not the least I'm also very interested about following the Huge Page (Huge Page as in Transparent Huge Pages I assume) Futures topic already proposed. Thanks and hope to see you soon! Andrea -- 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>