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5 changes: 3 additions & 2 deletions blog/操作系统---lab5-demand-paging/index.html
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Expand Up @@ -1283,9 +1283,10 @@ <h2 id="page-fault">PAGE FAULT<a class="headerlink" href="#page-fault" title="An
<li>起地址不应小于文件内容开头地址<code>vm_start</code></li>
<li>起地址不应大于文件内容结尾地址<code>vm_start + vm_content_size_in_file</code></li>
<li>终地址不应大于文件内容结尾地址<code>vm_start + vm_content_size_in_file</code></li>
<li>拷贝</li>
</ul>
<h2 id="vmas">vmas<a class="headerlink" href="#vmas" title="Anchor link to this section for reference">&para;</a></h2>
<p>在kernel终,我们分配了一整页,其中的低地址放了个task_struct,高地址就是栈顶(如下图,来自实验文档)。所以我们要稍微限制一下vmas的大小,不能把分配的一页全给了,还要留点给栈用。</p>
<p>在kernel终,我们分配了一整页,其中的低地址放了个task_struct,高地址就是栈顶(如下图,来自实验文档)。所以我们要稍微限制一下vmas的大小,不能把分配的一页全给用了,还要留点给栈用。</p>
<div class="language-text highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-1-1"> 1</a></span>
<span class="normal"><a href="#__codelineno-1-2"> 2</a></span>
<span class="normal"><a href="#__codelineno-1-3"> 3</a></span>
Expand Down Expand Up @@ -1354,7 +1355,7 @@ <h2 id="vmas">vmas<a class="headerlink" href="#vmas" title="Anchor link to this
<span class="md-icon" title="Last update">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1-2.1-2M12.5 7v5.2l4 2.4-1 1L11 13V7h1.5M11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2v1.8Z"/></svg>
</span>
<span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date">December 10, 2023</span>
<span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date">December 11, 2023</span>
</span>


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