LKML News v6.12-rc4

[Invitation] bi-weekly guest_memfd upstream call on 2024-10-17 (David Hildenbrand)

https://lore.kernel.org/df619e65-e65e-4856-b4ca-9938e8e08f18@redhat.com

David starts a bi-weekly call series for discussing guest_memfd. The first instance will be held on 2024-10-17 9am PT.

[Invitation] Linux MM Alignment Session on IOMMU(fd) persistence and Kexec Hand Over (KHO) on Wednesday (David Rientjes)

https://lore.kernel.org/c85a45fb-7b21-4f9f-568a-e86debbd001a@google.com

David invites people to next MM alignment session. The topic will be Amazon’s kexec hand-over for making iommu persistent during live update of kernel.

[PATCH v3 0/5] page allocation tag compression (Suren Baghdasaryan)

https://lore.kernel.org/20241014203646.1952505-1-surenb@google.com

Suren posted the third version of the patch series for reducing page allocation profiling’s memory overhead.

[RFC 0/2] rwsem: introduce upgrade_read interface (Li Zhe)

https://lore.kernel.org/20241016043600.35139-1-lizhe.67@bytedance.com

Li sent an RFC patch for introducing new reader-writer semaphore feature for upgrading it from read lock to write lock. He mentions khugepaged as an example that can get benefit from the new feature. There are some questions about the fundamental problem of the semantic though.

Pmemfs/guestmemfs discussion recap and open questions (David Rientjes)

https://lore.kernel.org/f44f317a-2dcb-cfe2-013c-7508907ce3df@google.com

David shares a summary of yesterday’s MM alignment session for live hypervisor kernel upgrade using KHO, with open questions that not got aligned answers yesterdasy.