Dynamically allocated memory descriptors (Matthew Wilcox) https://lkml.kernel.org/r/YXcLqcFhDq3uUwIj@casper.infradead.org
In this mail, Matthew explains his idea on making struct page only two words and how it could work with buddy allocator freelists.
[RFC] mm: Disable NUMA_BALANCING_DEFAULT_ENABLED and TRANSPARENT_HUGEPAGE on PREEMPT_RT (Sebastian Andrzej Siewior) https://lkml.kernel.org/r/20211026165100.ahz5bkx44lrrw5pt@linutronix.de
Mel told RT patchset could incur spikes on NUMA machines when NUMA_BALANCING and THP are turned on. Sebastian request comments on disabling those on RT enabled kernel by default, but still trying to find a good test for that.
incoming (Andrew Morton) https://lkml.kernel.org/r/20211018151438.f2246e2656c041b6753a8bdd@linux-foundation.org
19 mm subsystem fix patches have sent to Linus Torvalds.
[PATCH v11 1/3] mm: rearrange madvise code to allow for reuse (Suren Baghdasaryan) https://lkml.kernel.org/r/20211019215511.3771969-1-surenb@google.com
This commit refactor some madvise code for vma updates so that those can be reused by prctl.
mmotm 2021-10-20-20-40 uploaded (Andrew Morton) https://lkml.kernel.org/r/20211021034104.F6VxKBQcG%akpm@linux-foundation.org
Andrew updated mmotm. It’s based on 5.15-rc6, adds 74 new patches modifies 29 existing patches, and drops 22 patches. In total, 366 patches in the queue.
mmotm 2021-10-10-18-19 uploaded (Andrew Morton) https://lkml.kernel.org/r/20211011012001.mSbkDke0y%akpm@linux-foundation.org
Update of mmotm. 33 new patches added and 7 old patches dropped. 285 patches in total.
[PATCH v2 0/2] Introduce simple pidfd to task helper (Christian Brauner) https://lkml.kernel.org/r/20211011133245.1703103-1-brauner@kernel.org
This patchset adds a simple helper to make code clean without duplications.
[PATCH v0.7 0/5] sched,mm,x86/uaccess: implement User Managed Concurrency Groups (Peter Oskolkov) https://lkml.kernel.org/r/20211012232522.714898-1-posk@google.com
This patchset implements the kernel parts for user-space m:n threading. If this is finalized and merged, user-space applications will be able to do the scheduling of their threads on their own.
[PATCH 0/2] Introduce simple pidfd to task helper (Christian Brauner) https://lkml.kernel.org/r/20211004125050.1153693-1-christian.brauner@ubuntu.com
This patchset adds a pidfd handling wrapper for removing duplications.
[PATCH 00/62] Separate struct slab from struct page (Matthew Wilcox) https://lkml.kernel.org/r/20211004134650.4031813-1-willy@infradead.org
This huge patchset separates struct slab from struct page to make struct page simple and therefore easier to handle.
[PATCH v3 00/66] Introducing the Maple Tree (Liam Howlett) https://lkml.kernel.org/r/20211005012959.1110504-1-Liam.Howlett@oracle.com
This patchset introduces Maple tree, which is intended to replace the rb tree for vmas, to improve the scalability.
[RFC PATCH 0/8] mm/madvise: support process_madvise(MADV_DONTNEED) (Nadav Amit) https://lkml.kernel.org/r/20210926161259.238054-1-namit@vmware.com
This patchset makes process_madvise() to support MADV_DONTNEED hint.
mmotm 2021-09-28-19-05 uploaded (Andrew Morton) https://lkml.kernel.org/r/20210929020604.DyNimbxao%akpm@linux-foundation.org
The mm-of-the-moment snapshot has been updated. 13 drop, 45 add, 37 modified. 184 patches in the broken/ in total.
[PATCH 1/2] memcg: flush stats only if updated (Shakeel Butt) https://lkml.kernel.org/r/20210930044711.2892660-1-shakeelb@google.com
This patchset makes memcg stats updated only when needed, as it is currently flushed on every refault and reclaim iteration.
[RFC PATCH] Introducing lockless cache built on top of slab allocator (Hyeonggon Yoo) https://lkml.kernel.org/r/20210919164239.49905-1-42.hyeyoo@gmail.com
The block layer now has a lockless cache, which increased its IOPS. This RFC generalizes it so that it can be used in some other area, such as NAPI.
[PATCH v5 0/3] virtio-mem: disallow mapping virtio-mem memory via /dev/mem (David Hildenbrand) https://lkml.kernel.org/r/20210920142856.17758-1-david@redhat.com
This patchset makes a basic infrastructure to exclude some physical memory regions that marked as IORESOURCE_SYSTEM_RAM from /dev/mem access, even though they are not marked as IORESOURCE_BUSY.
[PATCH v1] vmpressure: wake up work only when there is registration event (wangyong) https://lkml.kernel.org/r/1631548441-2784-1-git-send-email-wang.yong12@zte.com.cn
Currently, vmpressure works are awaken even though there are no vmpressure callbacks. This commit avoids such unnecessary wakeup by counting the number of registered events and skip waking up works if the number is zero.
[PATCH v3 00/76] Optimize list lru memory consumption (Muchun Song) https://lkml.kernel.org/r/20210914072938.6440-1-songmuchun@bytedance.com
Muchun found kmalloc-32 for list_lru_one allocation consuming 6 GiB of memory on their server.
[RFC PATCH] mm/oom: detect and kill task which has allocation forbidden by cpuset limit (Feng Tang) https://lkml.kernel.org/r/1630399085-70431-1-git-send-email-feng.tang@intel.com
Docker needs to allocate memory in non-movable zones for creation of an OS (e.g., GFP_HIGHUSER). However, if it is binded to a cpuset which has only movable zone, the allocation fails and OOM storm attacks other innocent processes. This patch detects the case and kill only the allocation failing process.
Folios: Can we resolve this please?
[GIT PULL] Memory folios for v5.15 (Matthew Wilcox) https://lkml.kernel.org/r/YSPwmNNuuQhXNToQ@casper.infradead.org
Matthew Wilcox sent a pull request for his page folio works to Linus Torvalds. Linus Torvalds replied he wants this to work in reverse. That is, calling head pages as normal pages but calling tail pages something other, as the term, page, is more common and de-facto standard in the industry.
mmotm 2021-08-23-16-42 uploaded (Andrew Morton) https://lkml.kernel.org/r/20210823234329.H9WD-du1K%akpm@linux-foundation.org
MMOTM is rebased on v5.
[PATCH v2 0/3] virtio-mem: disallow mapping virtio-mem memory via /dev/mem (David Hildenbrand) https://lkml.kernel.org/r/20210816142505.28359-1-david@redhat.com
Once the virtio-mem driver is plugging/unplugging memory of virtual machines, accessing the memory region via /dev/mem from the user space makes no sense. To avoid such insane use case, this patchset adds a basic infrastructure to exclude some physical memory regions completely from /dev/mem.
[PATCH v2 00/61] Introducing the Maple Tree (Liam Howlett) https://lkml.kernel.org/r/20210817154651.1570984-1-Liam.Howlett@oracle.com
This patchset introduces a new data structure called maple tree, which intended to replace the rbtree for vm_area_struct.