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description/memory: update to day 20211112

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study/kernel/00-DESCRIPTION/ARCH.md
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@@ -160,6 +160,14 @@ SGX 旨在以硬件安全为强制性保障, 不依赖于固件和软件的安
|:----:|:----:|:---:|:----:|:---------:|:----:|
| 2021/11/02 | Catalin Marinas <catalin.marinas@arm.com> | [Basic recovery for machine checks inside SGX](https://lore.kernel.org/lkml/20201002201931.2826-1-ricardo.neri-calderon@linux.intel.com) | 支持混合微架构的 CPU(Alder Lake CPU) | v11 ☐ | [Patchwork v11,0/7](https://patchwork.kernel.org/project/linux-mm/cover/20211026220050.697075-1-tony.luck@intel.com) |
## 1.7 AMD
-------
| 时间 | 作者 | 特性 | 描述 | 是否合入主线 | 链接 |
|:----:|:----:|:---:|:----:|:---------:|:----:|
| 2021/11/10 | Brijesh Singh <brijesh.singh@amd.com> | [Add AMD Secure Nested Paging (SEV-SNP) Guest Support](https://patchwork.kernel.org/project/linux-mm/cover/20211110220731.2396491-1-brijesh.singh@amd.com) | Guest 支持 AMD SEV SNP. | v7 ☐ | [Patchwork v7,00/45](https://patchwork.kernel.org/project/linux-mm/cover/20211110220731.2396491-1-brijesh.singh@amd.com) |
# 2 ARM64
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study/kernel/00-DESCRIPTION/MEMORY_MANAGER.md
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@@ -267,6 +267,8 @@ Linux 一开始是在一台i386上的机器开发的, i386 的硬件页表是2
| 2021/06/30 | "Matthew Wilcox (Oracle)" <willy@infradead.org> | [Folio conversion of memcg](https://lwn.net/Articles/1450196) | NA | v3 ☐ | [PatchWork v13b](https://patchwork.kernel.org/project/linux-mm/cover/20210712194551.91920-1-willy@infradead.org/) |
| 2021/07/19 | "Matthew Wilcox (Oracle)" <willy@infradead.org> | [Folio support in block + iomap layers](https://lwn.net/Articles/1450196) | NA | v15 ☐ | [PatchWork v15,00/17](https://patchwork.kernel.org/project/linux-mm/cover/20210712194551.91920-1-willy@infradead.org/) |
| 2021/07/15 | "Matthew Wilcox (Oracle)" <willy@infradead.org> | [Memory folios: Pagecache edition](https://patchwork.kernel.org/project/linux-mm/cover/20210715200030.899216-1-willy@infradead.org) | NA | v14c ☑ 5.16-rc1 | [PatchWork v14c,00/39](https://patchwork.kernel.org/project/linux-mm/cover/20210715200030.899216-1-willy@infradead.org) |
| 2021/11/10 | David Howells <dhowells@redhat.com> | [netfs, 9p, afs, ceph: Support folios, at least partially](https://patchwork.kernel.org/project/linux-mm/cover/163649323416.309189.4637503793406396694.stgit@warthog.procyon.org.uk) | NA | v5 ☐ | [PatchWork v4,0/5](https://patchwork.kernel.org/project/linux-mm/cover/163649323416.309189.4637503793406396694.stgit@warthog.procyon.org.uk)<br>*-*-*-*-*-*-*-* <br>[PatchWork v5,0/4](https://patchwork.kernel.org/project/linux-mm/cover/163657847613.834781.7923681076643317435.stgit@warthog.procyon.org.uk) |
| 时间 | 作者 | 特性 | 描述 | 是否合入主线 | 链接 |
|:----:|:----:|:---:|:----:|:---------:|:----:|
@@ -299,7 +301,7 @@ Linux 一开始是在一台i386上的机器开发的, i386 的硬件页表是2
| 时间 | 作者 | 特性 | 描述 | 是否合入主线 | 链接 |
|:----:|:----:|:---:|:----:|:---------:|:----:|
| 2021/08/19 | Qi Zheng <zhengqi.arch@bytedance.com> | [Free user PTE page table pages](https://patchwork.kernel.org/project/linux-mm/cover/20210819031858.98043-1-zhengqi.arch@bytedance.com) | 这个补丁系列的目的是在所有 PTE 条目都为空时释放用户 PTE 页表页面.<br>一些malloc库(例如 jemalloc 或 tcmalloc) 通常通过 mmap() 分配 VAs 的数量, 而不取消这些 VAs 的映射. 如果需要, 他们将使用 madvise(MADV_DONTNEED) 来释放物理内存. 但是 madvise() 不会释放页表, 因此当进程接触到巨大的虚拟地址空间时, 它会生成许多页表.<br>PTE 页表占用大量内存的原因是 madvise(MADV_DONTNEED) 只清空 PTE 并释放物理内存, 但不释放 PTE 页表页. 这组补丁通过释放那些空的 PTE 页表来节省内存. | v1 ☐ | [PatchWork 0/7](https://lore.kernel.org/patchwork/cover/1461972)<br>*-*-*-*-*-*-*-* <br>[PatchWork v2,0/9](https://patchwork.kernel.org/project/linux-mm/cover/20210819031858.98043-1-zhengqi.arch@bytedance.com) |
| 2021/11/10 | Qi Zheng <zhengqi.arch@bytedance.com> | [Free user PTE page table pages](https://patchwork.kernel.org/project/linux-mm/cover/20210819031858.98043-1-zhengqi.arch@bytedance.com) | 这个补丁系列的目的是在所有 PTE 条目都为空时释放用户 PTE 页表页面.<br>一些malloc库(例如 jemalloc 或 tcmalloc) 通常通过 mmap() 分配 VAs 的数量, 而不取消这些 VAs 的映射. 如果需要, 他们将使用 madvise(MADV_DONTNEED) 来释放物理内存. 但是 madvise() 不会释放页表, 因此当进程接触到巨大的虚拟地址空间时, 它会生成许多页表.<br>PTE 页表占用大量内存的原因是 madvise(MADV_DONTNEED) 只清空 PTE 并释放物理内存, 但不释放 PTE 页表页. 这组补丁通过释放那些空的 PTE 页表来节省内存. | v1 ☐ | [PatchWork 0/7](https://lore.kernel.org/patchwork/cover/1461972)<br>*-*-*-*-*-*-*-* <br>[2021/08/19 PatchWork v2,0/9](https://patchwork.kernel.org/project/linux-mm/cover/20210819031858.98043-1-zhengqi.arch@bytedance.com)<br>*-*-*-*-*-*-*-* <br>[2021/11/10 PatchWork v3,00/15](https://patchwork.kernel.org/project/linux-mm/cover/20211110084057.27676-1-zhengqi.arch@bytedance.com) |
| 2021/09/26 | Anthony Yznaga <anthony.yznaga@oracle.com> | [mm/madvise: support process_madvise(MADV_DONTNEED)](https://patchwork.kernel.org/project/linux-mm/cover/20210926161259.238054-1-namit@vmware.com) | 这些补丁的目标是添加对 process_madvise(MADV_DONTNEED) 的支持. 然而, 在这个过程中, 执行了一些(可以说)有用的清理、bug修复和性能增强. 这些补丁试图整合不同行为之间的逻辑, 并在一定程度上解决与之前[比较出彩的补丁](https://lore.kernel.org/linux-mm/CAJuCfpFDBJ_W1y2tqAT4BGtPbWrjjDud_JuKO8ZbnjYfeVNvRg@mail.gmail.com) 的冲突.<br>process_madvise(MADV_DONTNEED) 之所以有用有两个原因:<br>(a)它允许 userfaultfd 监视器从被监控的进程中取消内存映射;<br>(b) 它 比 madvise() 更有效, 因为它是矢量化的, 批处理 TLB 刷新更积极. | RFC ☐ | [PatchWork RFC,0/8](https://patchwork.kernel.org/project/linux-mm/cover/20210926161259.238054-1-namit@vmware.com) |
@@ -3544,6 +3546,7 @@ DAMON 利用两个核心机制 : **基于区域的采样**和**自适应区域
| 2021/08/05 | Christoph Lameter <clameter@sgi.com> | [Some cleanup for page migration](https://lore.kernel.org/patchwork/cover/1472581) | NA | v1 ☐ | [PatchWork 0/5](https://lore.kernel.org/patchwork/cover/49754) |
| 2021/09/22 | John Hubbard <jhubbard@nvidia.com> | [mm/migrate: de-duplicate migrate_reason strings](https://patchwork.kernel.org/project/linux-mm/patch/20210922041755.141817-2-jhubbard@nvidia.com/) | NA | v1 ☐ | [PatchWork 0/5](https://patchwork.kernel.org/project/linux-mm/patch/20210922041755.141817-2-jhubbard@nvidia.com/) |
| 2021/11/03 | Baolin Wang <baolin.wang@linux.alibaba.com> | [Improve the migration stats](https://patchwork.kernel.org/project/linux-mm/cover/cover.1635936218.git.baolin.wang@linux.alibaba.com) | 根据与 [Zi Yan](https://lore.kernel.org/linux-mm/7E44019D-2A5D-4BA7-B4D5-00D4712F1687@nvidia.com) 的谈话, 这个补丁集改变了 migrate_pages() 的返回值, 以避免返回的数字大于用户通过 move_pages() 系统调用尝试迁移的页面数. 还修复了 trace_mm_compaction_migratepages() 中的 hugetlb 迁移统计和迁移统计. | v1 ☐ | [PatchWork](https://lore.kernel.org/linux-mm/b35e54802a9a82d03d24845b463e9d9a68f7fd6b.1635491660.git.baolin.wang@linux.alibaba.com)<br>*-*-*-*-*-*-*-* <br>[PatchWork RFC,0/3](https://patchwork.kernel.org/project/linux-mm/cover/cover.1635936218.git.baolin.wang@linux.alibaba.com) |
| 2021/11/11 | Baolin Wang <baolin.wang@linux.alibaba.com> | [Support multiple target nodes demotion](https://patchwork.kernel.org/project/linux-mm/cover/cover.1636616548.git.baolin.wang@linux.alibaba.com) | 对于同时有1个快速(DRAM)内存节点和多个慢速(持久内存)内存节点的系统, 根据当前节点降级策略不感知节点之间的距离, 速度和带宽等. 该补丁修改了 node_demotion 数据结构, 以支持多个目标节点, 并建立迁移路径以支持多个目标节点验证节点距离是否是最好的. | v1 ☐ | [PatchWork v1](https://patchwork.kernel.org/project/linux-mm/patch/8850612186ea23eb5d328d84e4008a6b60f418e1.1636514506.git.baolin.wang@linux.alibaba.com)<br>*-*-*-*-*-*-*-* <br>[PatchWork v2](https://patchwork.kernel.org/project/linux-mm/patch/f6d68800ff2efcb0720599ae092d30765a640232.1636428988.git.baolin.wang@linux.alibaba.com)<br>*-*-*-*-*-*-*-* <br>[PatchWork v2,0/2](hhttps://patchwork.kernel.org/project/linux-mm/cover/cover.1636616548.git.baolin.wang@linux.alibaba.com)<br>*-*-*-*-*-*-*-* <br>[PatchWork v3](https://patchwork.kernel.org/project/linux-mm/patch/a31dc065a7901bcdca0d9642d0def0f57e865e20.1636683991.git.baolin.wang@linux.alibaba.com) |
* numa balancing
@@ -3621,7 +3624,7 @@ https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7e
| 2007/07/17 | Mel Gorman <mel@csn.ul.ie> | [Add a movablecore= parameter for sizing ZONE_MOVABLE](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7e63efef857575320fb413fbc3d0ee704b72845f) | NA | v1 ☑ 2.6.23-rc1 | [LWN v7,00/14](https://lwn.net/ml/linux-kernel/20210122033748.924330-1-pasha.tatashin@soleen.com/), [commit](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7e63efef857575320fb413fbc3d0ee704b72845f) |
| 2016/01/08 | Taku Izumi <izumi.taku@jp.fujitsu.com> | [handle kernelcore=: generic](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ed7ed365172e27b0efe9d43cc962723c7193e34e) | 之前 kernelcore 启动参数的处理是架构相关的, 可能导致某些架构出现问题. 这个补丁使用通用代码来处理 `kernelcore` 参数. 适用于支持独立于 arch 的区域大小调整(即定义 CONFIG_ARCH_POPULATES_NODE_MAP) 的架构, 其他架构将忽略引导参数. | v1 ☑ 2.6.23-rc1 | [commit](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ed7ed365172e27b0efe9d43cc962723c7193e34e) |
| 2013/01/14 | Mel Gorman <mel@csn.ul.ie> | [Add movablecore_map boot option](https://lkml.org/lkml/2013/1/14/87) | NA | v5 ☑ 3.9-rc1 | [LKML v5,0/5](https://lkml.org/lkml/2013/1/14/87) |
| 2018/04/02 | Dou Liyang | [x86/boot/KASLR: Extend movable_node option for KASLR](https://lkml.org/lkml/2018/4/2/600) | NA | v1 ☐ | [LKML v5,0/5](https://lkml.org/lkml/2018/4/2/600) |
| 2018/04/02 | Dou Liyang | [x86/boot/KASLR: Extend movable_node option for KASLR](https://lkml.org/lkml/2018/4/2/600) | NA | v1 ☐ | [LKML v5,0/5](https://lkml.org/lkml/2018/4/2/600) |
@@ -3636,7 +3639,12 @@ https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7e
| 2018/2/12 | David Rientjes <rientjes@google.com> | [mm: Introduce kernelcore=mirror option](http://lore.kernel.org/patchwork/patch/574230) | `kernelcore=` 和 `movablecore=` 都可以分别用于定义系统上 ZONE_NORMAL 和 ZONE_MOVABLE 的数量. 然而, 这需要在指定命令行时知道系统内存容量. 这个补丁引入了将 `kernelcore` 和 `movablecore` 定义为系统总内存的百分比的能力. 这对于希望将 ZONE_MOVABLE 的数量定义为系统内存的比例(而不是硬编码的字节值)的系统软件来说是很方便的. 要定义百分比, 参数的最后一个字符应该是 '%'. | v4 ☑ 4.17-rc1 | [LKML 1/2](https://lkml.org/lkml/2018/2/12/1024) |
## 14.14 shmem
-------
| 时间 | 作者 | 特性 | 描述 | 是否合入主线 | 链接 |
|:----:|:----:|:---:|:----:|:---------:|:----:|
| 2021/11/11 | Mina Almasry <almasrymina@google.com> | [mm/shmem: support deterministic charging of tmpfs](https://patchwork.kernel.org/project/linux-mm/patch/20211110211951.3730787-2-almasrymina@google.com) | NA | v1 ☐ | [PatchWork v2,1/4](https://patchwork.kernel.org/project/linux-mm/patch/20211110211951.3730787-2-almasrymina@google.com)<br>*-*-*-*-*-*-*-* <br>[PatchWork v3,1/4](https://patchwork.kernel.org/project/linux-mm/patch/20211111234203.1824138-2-almasrymina@google.com) |
---
study/kernel/00-DESCRIPTION/VIRT.md
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@@ -147,6 +147,8 @@ jeremy很早就写了一个pv ticketlock, 原理大概就是vcpu在拿锁了一
| 时间 | 作者 | 特性 | 描述 | 是否合入主线 | 链接 |
|:----:|:----:|:---:|:----:|:---------:|:----:|
| 2021/10/05 | David Hildenbrand <david@redhat.com> | [proc/vmcore: sanitize access to virtio-mem memory](https://patchwork.kernel.org/project/linux-mm/cover/20211005121430.30136-1-david@redhat.com) | NA | v2 ☑ 4.19-rc1 | [PatchWork v2,0/9](https://patchwork.kernel.org/project/linux-mm/cover/20211005121430.30136-1-david@redhat.com) |
| 2021/11/11 | Chao Peng <chao.p.peng@linux.intel.com> | [KVM: mm: fd-based approach for supporting KVM guest private memory](https://patchwork.kernel.org/project/linux-mm/cover/20211111141352.26311-1-chao.p.peng@linux.intel.com) | NA | RFC ☐ | [PatchWork RFC,0/6](https://patchwork.kernel.org/project/linux-mm/cover/20211111141352.26311-1-chao.p.peng@linux.intel.com) |
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