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[203.218.244.78]) by smtp.gmail.com with ESMTPSA id k15-20020a63ab4f000000b00381eef69bfbsm3622152pgp.3.2022.03.16.23.51.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Mar 2022 23:51:27 -0700 (PDT) From: Yanteng Si X-Google-Original-From: Yanteng Si To: corbet@lwn.net, alexs@kernel.org, seakeel@gmail.com Cc: Yanteng Si , chenhuacai@kernel.org, jiaxun.yang@flygoat.com, linux-doc@vger.kernel.org, Yanteng Si Subject: [PATCH v2 11/12] docs/zh_CN: add vm z3fold translation Date: Thu, 17 Mar 2022 14:50:52 +0800 Message-Id: <47e74b76b6b375d01c1e387f386faa2ef337fc20.1647498763.git.siyanteng@loongson.cn> X-Mailer: git-send-email 2.27.0 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org From: Yanteng Si Translate .../vm/z3fold.rst into Chinese. Signed-off-by: Yanteng Si --- Documentation/translations/zh_CN/vm/index.rst | 2 +- .../translations/zh_CN/vm/z3fold.rst | 31 +++++++++++++++++++ 2 files changed, 32 insertions(+), 1 deletion(-) create mode 100644 Documentation/translations/zh_CN/vm/z3fold.rst diff --git a/Documentation/translations/zh_CN/vm/index.rst b/Documentation/translations/zh_CN/vm/index.rst index 8c7d0b1e5c3e..e28d0e919bfe 100644 --- a/Documentation/translations/zh_CN/vm/index.rst +++ b/Documentation/translations/zh_CN/vm/index.rst @@ -37,6 +37,7 @@ TODO:待引用文档集被翻译完毕后请及时修改此处） page_table_check remap_file_pages split_page_table_lock + z3fold TODOLIST: * arch_pgtable_helpers @@ -49,5 +50,4 @@ TODOLIST: * transhuge * unevictable-lru * vmalloced-kernel-stacks -* z3fold * zsmalloc diff --git a/Documentation/translations/zh_CN/vm/z3fold.rst b/Documentation/translations/zh_CN/vm/z3fold.rst new file mode 100644 index 000000000000..fd0f1ac850d7 --- /dev/null +++ b/Documentation/translations/zh_CN/vm/z3fold.rst @@ -0,0 +1,31 @@ +:Original: Documentation/vm/z3fold.rst + +:翻译: + + 司延腾 Yanteng Si + +: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响应关键的系统。 -- 2.27.0