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page cache limit 特性为什么只回收文件页不回收匿名页 #108

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huhaipeng opened this issue Nov 3, 2021 · 4 comments
Closed

page cache limit 特性为什么只回收文件页不回收匿名页 #108

huhaipeng opened this issue Nov 3, 2021 · 4 comments

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@huhaipeng
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看了page cache limit的代码，我有一个疑问，为什么只回收文件页不回收匿名页？我觉得匿名页也是可以根据系统需要做一定比例的回收。还是说我的理解有问题，回收匿名页会有什么坑吗？
@huhaipeng
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@honkiko @hzlzh @oilbeater @yyx

@joeytsq
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joeytsq commented Mar 23, 2022

@zhipingdu111

@204184251HQG
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因为匿名页需要swap，比较耗时，相比文件映射，会触发大量io

@huhaipeng
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因为匿名页需要swap，比较耗时，相比文件映射，会触发大量io

照抄官方文档有意思？

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@huhaipeng @204184251HQG @kaixuxiakx @joeytsq and others