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author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-08-05 16:32:45 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-08-05 16:32:45 -0700 |
commit | 6614a3c3164a5df2b54abb0b3559f51041cf705b (patch) | |
tree | 1c25c23d9efed988705287fc2ccb78e0e76e311d /Documentation/translations/zh_CN/mm/z3fold.rst | |
parent | 74cae210a335d159f2eb822e261adee905b6951a (diff) | |
parent | 360614c01f81f48a89d8b13f8fa69c3ae0a1f5c7 (diff) |
Merge tag 'mm-stable-2022-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
"Most of the MM queue. A few things are still pending.
Liam's maple tree rework didn't make it. This has resulted in a few
other minor patch series being held over for next time.
Multi-gen LRU still isn't merged as we were waiting for mapletree to
stabilize. The current plan is to merge MGLRU into -mm soon and to
later reintroduce mapletree, with a view to hopefully getting both
into 6.1-rc1.
Summary:
- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe
Lin, Yang Shi, Anshuman Khandual and Mike Rapoport
- Some kmemleak fixes from Patrick Wang and Waiman Long
- DAMON updates from SeongJae Park
- memcg debug/visibility work from Roman Gushchin
- vmalloc speedup from Uladzislau Rezki
- more folio conversion work from Matthew Wilcox
- enhancements for coherent device memory mapping from Alex Sierra
- addition of shared pages tracking and CoW support for fsdax, from
Shiyang Ruan
- hugetlb optimizations from Mike Kravetz
- Mel Gorman has contributed some pagealloc changes to improve
latency and realtime behaviour.
- mprotect soft-dirty checking has been improved by Peter Xu
- Many other singleton patches all over the place"
[ XFS merge from hell as per Darrick Wong in
https://lore.kernel.org/all/YshKnxb4VwXycPO8@magnolia/ ]
* tag 'mm-stable-2022-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (282 commits)
tools/testing/selftests/vm/hmm-tests.c: fix build
mm: Kconfig: fix typo
mm: memory-failure: convert to pr_fmt()
mm: use is_zone_movable_page() helper
hugetlbfs: fix inaccurate comment in hugetlbfs_statfs()
hugetlbfs: cleanup some comments in inode.c
hugetlbfs: remove unneeded header file
hugetlbfs: remove unneeded hugetlbfs_ops forward declaration
hugetlbfs: use helper macro SZ_1{K,M}
mm: cleanup is_highmem()
mm/hmm: add a test for cross device private faults
selftests: add soft-dirty into run_vmtests.sh
selftests: soft-dirty: add test for mprotect
mm/mprotect: fix soft-dirty check in can_change_pte_writable()
mm: memcontrol: fix potential oom_lock recursion deadlock
mm/gup.c: fix formatting in check_and_migrate_movable_page()
xfs: fail dax mount if reflink is enabled on a partition
mm/memcontrol.c: remove the redundant updating of stats_flush_threshold
userfaultfd: don't fail on unrecognized features
hugetlb_cgroup: fix wrong hugetlb cgroup numa stat
...
Diffstat (limited to 'Documentation/translations/zh_CN/mm/z3fold.rst')
-rw-r--r-- | Documentation/translations/zh_CN/mm/z3fold.rst | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/translations/zh_CN/mm/z3fold.rst b/Documentation/translations/zh_CN/mm/z3fold.rst new file mode 100644 index 000000000000..9569a6d88270 --- /dev/null +++ b/Documentation/translations/zh_CN/mm/z3fold.rst @@ -0,0 +1,31 @@ +:Original: Documentation/mm/z3fold.rst + +:翻译: + + 司延腾 Yanteng Si <siyanteng@loongson.cn> + +:校译: + + +====== +z3fold +====== + +z3fold是一个专门用于存储压缩页的分配器。它被设计为每个物理页最多可以存储三个压缩页。 +它是zbud的衍生物,允许更高的压缩率,保持其前辈的简单性和确定性。 + +z3fold和zbud的主要区别是: + +* 与zbud不同的是,z3fold允许最大的PAGE_SIZE分配。 +* z3fold在其页面中最多可以容纳3个压缩页面 +* z3fold本身没有输出任何API,因此打算通过zpool的API来使用 + +为了保持确定性和简单性,z3fold,就像zbud一样,总是在每页存储一个整数的压缩页,但是 +它最多可以存储3页,不像zbud最多可以存储2页。因此压缩率达到2.7倍左右,而zbud的压缩 +率是1.7倍左右。 + +不像zbud(但也像zsmalloc),z3fold_alloc()那样不返回一个可重复引用的指针。相反,它 +返回一个无符号长句柄,它编码了被分配对象的实际位置。 + +保持有效的压缩率接近于zsmalloc,z3fold不依赖于MMU的启用,并提供更可预测的回收行 +为,这使得它更适合于小型和反应迅速的系统。 |