From 3116567cdbe568c9192a0b360daae475f2f5eb0c Mon Sep 17 00:00:00 2001 From: Cheng Jian Date: Mon, 2 May 2022 16:20:40 +0800 Subject: [PATCH] description/memory: update patchwork series to 20220430 --- study/kernel/00-DESCRIPTION/MEMORY_MANAGER.md | 11 ++++++++++- study/kernel/00-DESCRIPTION/SCHEDULER.md | 2 ++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/study/kernel/00-DESCRIPTION/MEMORY_MANAGER.md b/study/kernel/00-DESCRIPTION/MEMORY_MANAGER.md index fddf2a9..46a453f 100644 --- a/study/kernel/00-DESCRIPTION/MEMORY_MANAGER.md +++ b/study/kernel/00-DESCRIPTION/MEMORY_MANAGER.md @@ -316,6 +316,13 @@ Linux 一开始是在一台i386上的机器开发的, i386 的硬件页表是2 | 2022/01/10 | "Matthew Wilcox (Oracle)" | [Convert GUP to folios](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/?id=1b7f7e58decccb52d6bc454413e3298f1ab3a9c6) | NA | v1 ☑ 5.18-rc1 | [PatchWork 00/17](https://patchwork.kernel.org/project/linux-mm/cover/20220102215729.2943705-1-willy@infradead.org)
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[PatchWork v2,00/28](https://patchwork.kernel.org/project/linux-mm/cover/20220110042406.499429-1-willy@infradead.org) | | 2022/01/05 | Alex Shi | [remove add/del page to lru functions](https://patchwork.kernel.org/project/linux-mm/cover/20220120131024.502877-1-alexs@kernel.org) | 使用了 folio 之后, LRU 后部分函数可以删除. | v1 ☐ | [PatchWork 0/5](https://patchwork.kernel.org/project/linux-mm/cover/20220120131024.502877-1-alexs@kernel.org) | +#### 1.4.1.3 Memory folios @5.19 +------- + +| 时间 | 作者 | 特性 | 描述 | 是否合入主线 | 链接 | +|:----:|:----:|:---:|:----:|:---------:|:----:| +| 2022/04/29 | Matthew Wilcox (Oracle) | [Folio patches for 5.19](https://patchwork.kernel.org/project/linux-mm/cover/20220429192329.3034378-1-willy@infradead.org/) | 637111 | v1 ☐☑ | [LORE v1,0/21](https://lore.kernel.org/r/20220429192329.3034378-1-willy@infradead.org) | + ### 1.4.2 Pulling slabs out of struct page ------- @@ -401,6 +408,7 @@ 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 | |:----:|:----:|:---:|:----:|:---------:|:----:| | 2021/11/10 | Qi Zheng | [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.
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.
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/patch/1461972)
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[2021/08/19 PatchWork v2,0/9](https://patchwork.kernel.org/project/linux-mm/cover/20210819031858.98043-1-zhengqi.arch@bytedance.com)
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[2021/11/10 PatchWork v3,00/15](https://patchwork.kernel.org/project/linux-mm/cover/20211110084057.27676-1-zhengqi.arch@bytedance.com) | +| 2022/04/29 | Qi Zheng | [Try to free user PTE page table pages](https://patchwork.kernel.org/project/linux-mm/cover/20220429133552.33768-1-zhengqi.arch@bytedance.com/) | 636959 | v1 ☐☑ | [LORE v1,0/18](https://lore.kernel.org/r/20220429133552.33768-1-zhengqi.arch@bytedance.com) | | 2021/09/26 | Anthony Yznaga | [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.
process_madvise(MADV_DONTNEED) 之所以有用有两个原因:
(a)它允许 userfaultfd 监视器从被监控的进程中取消内存映射;
(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) | | 2022/03/04 | Johannes Weiner | [mm: madvise: MADV_DONTNEED_LOCKED](https://lore.kernel.org/all/20220304171912.305060-1-hannes@cmpxchg.org) | 20220304171912.305060-1-hannes@cmpxchg.org | v1 ☐☑✓ | [LORE](https://lore.kernel.org/all/20220304171912.305060-1-hannes@cmpxchg.org) | @@ -4538,7 +4546,7 @@ Google 的工程师 Mina Almasry 提出了一种新的思路, 通过 [mremap 的 | 2022/02/01 | Anshuman Khandual | [mm/hugetlb: Generalize ARCH_WANT_GENERAL_HUGETLB](https://patchwork.kernel.org/project/linux-mm/patch/1643718465-4324-1-git-send-email-anshuman.khandual@arm.com/) | 610328 |v1 ☐☑ | [PatchWork v1,0/1](https://lore.kernel.org/r/1643718465-4324-1-git-send-email-anshuman.khandual@arm.com) | | 2022/03/07 | Mike Kravetz | [hugetlb: do not demote poisoned hugetlb pages](https://patchwork.kernel.org/project/linux-mm/patch/20220307215707.50916-1-mike.kravetz@oracle.com/) | 621194 | v1 ☐☑ | [LORE v1,0/1](https://lore.kernel.org/r/20220307215707.50916-1-mike.kravetz@oracle.com) | | 2022/03/18 | Muchun Song | [add hugetlb_free_vmemmap sysctl](https://patchwork.kernel.org/project/linux-mm/cover/20220307130708.58771-1-songmuchun@bytedance.com/) | 621009 | v3 ☐☑ | [2022/03/07 LORE v3,0/4](https://lore.kernel.org/r/20220307130708.58771-1-songmuchun@bytedance.com)
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[2022/03/18 LORE v4,0/4](https://lore.kernel.org/r/20220318100720.14524-1-songmuchun@bytedance.com) | -| 2022/04/12 | Muchun Song | [add hugetlb_optimize_vmemmap sysctl](https://patchwork.kernel.org/project/linux-mm/cover/20220412111434.96498-1-songmuchun@bytedance.com/) | 631440 | v7 ☐☑ | [LORE v7,0/4](https://lore.kernel.org/r/20220412111434.96498-1-songmuchun@bytedance.com)
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[LORE v8,0/4](https://lore.kernel.org/r/20220413144748.84106-1-songmuchun@bytedance.com) | +| 2022/04/12 | Muchun Song | [add hugetlb_optimize_vmemmap sysctl](https://patchwork.kernel.org/project/linux-mm/cover/20220412111434.96498-1-songmuchun@bytedance.com/) | 631440 | v7 ☐☑ | [LORE v7,0/4](https://lore.kernel.org/r/20220412111434.96498-1-songmuchun@bytedance.com)
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[LORE v8,0/4](https://lore.kernel.org/r/20220413144748.84106-1-songmuchun@bytedance.com)
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[LORE v9,0/4](https://lore.kernel.org/r/20220429121816.37541-1-songmuchun@bytedance.com) | | 2013/03/20 | David Rientjes | [mm, hugetlb: include hugepages in meminfo](https://lore.kernel.org/all/alpine.DEB.2.02.1303201207110.28997@chino.kir.corp.google.com) | alpine.DEB.2.02.1303201207110.28997@chino.kir.corp.google.com | v2 ☐☑✓ | [LORE](https://lore.kernel.org/all/alpine.DEB.2.02.1303201207110.28997@chino.kir.corp.google.com) | | 2022/04/15 | Christophe Leroy | [mm, hugetlbfs: Allow for "high" userspace addresses](https://patchwork.kernel.org/project/linux-mm/patch/ab847b6edb197bffdfe189e70fb4ac76bfe79e0d.1650033747.git.christophe.leroy@csgroup.eu/) | 632590 | v10 ☐☑ | [LORE v10](https://lore.kernel.org/r/ab847b6edb197bffdfe189e70fb4ac76bfe79e0d.1650033747.git.christophe.leroy@csgroup.eu) | | 2022/04/20 | Mike Kravetz | [hugetlb: Change huge pmd sharing synchronization again](https://patchwork.kernel.org/project/linux-mm/cover/20220420223753.386645-1-mike.kravetz@oracle.com/) | 633940 | v2 ☐☑ | [LORE v2,0/6](https://lore.kernel.org/r/20220420223753.386645-1-mike.kravetz@oracle.com) | @@ -6308,6 +6316,7 @@ DAMON 利用两个核心机制 : **基于区域的采样**和**自适应区域 | 2022/04/18 | Yuanchu Xie | [[RESEND] selftests/damon: add damon to selftests root Makefile](https://patchwork.kernel.org/project/linux-mm/patch/20220418202017.3583638-1-yuanchu@google.com/) | 633136 | v1 ☐☑ | [LORE v1,0/1](https://lore.kernel.org/r/20220418202017.3583638-1-yuanchu@google.com) | | 2021/12/10 | SeongJae Park | [mm/damon/schemes: Extend stats for better online analysis and tuning](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/?id=dbcb9b9f954f71fb46be34af624c9edaaa171414) | 20211210150016.35349-1-sj@kernel.org | v1 ☑✓ 5.17-rc1 | [LORE v1,0/6](https://lore.kernel.org/all/20211210150016.35349-1-sj@kernel.org) | | 2022/01/14 | Baolin Wang | [mm/damon: add access checking for hugetlb pages](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=49f4203aae06ba9d67b500c90339b262b0a52637) | TODO | v1 ☐☑✓ | [LORE](https://lore.kernel.org/all/6afcbd1fda5f9c7c24f320d26a98188c727ceec3.1639623751.git.baolin.wang@linux.alibaba.com), [COMMIT](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=49f4203aae06ba9d67b500c90339b262b0a52637) | +| 2022/04/29 | SeongJae Park | [mm/damon: Support online tuning](https://patchwork.kernel.org/project/linux-mm/cover/20220429160606.127307-1-sj@kernel.org/) | 637059 | v1 ☐☑ | [LORE v1,0/14](https://lore.kernel.org/r/20220429160606.127307-1-sj@kernel.org) | ### 13.4.5 vmstat diff --git a/study/kernel/00-DESCRIPTION/SCHEDULER.md b/study/kernel/00-DESCRIPTION/SCHEDULER.md index d90a757..7e006dd 100644 --- a/study/kernel/00-DESCRIPTION/SCHEDULER.md +++ b/study/kernel/00-DESCRIPTION/SCHEDULER.md @@ -787,6 +787,8 @@ https://lore.kernel.org/lkml/157476581065.5793.4518979877345136813.stgit@buzz/ [内核工匠-负载均衡情景分析](https://blog.csdn.net/feelabclihu/article/details/112057633) +[干货｜CPU 可运行进程队列的负载均衡](https://zhuanlan.zhihu.com/p/489829757) + 一般我们提到的负载均衡器都特指 CFS 任务的负载均衡器, 它在两个时机进行负载均衡的工作: 1. 是为繁忙 CPU 们准备的周期性调度器 periodic balancer, 用于 CFS 任务在 busy CPU 上的均衡.