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linux-memory-layout |
2021-01-20T21:30 |
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Your RAM in Linux is built upon the following abstractions:
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Each CPU (multi-core or not) is associated to their own [[linux-memory-nodes]]#, ex: Node 0.
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Each node is made up of [[linux-memory-zones]]#, ex: DMA, DMA32, Normal.
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Each zone contains a set number of [[linux-memory-pages]]#, usually at the size of 4096 bytes.
- Each page can have a [[linux-memory-page-mapping]]#, ex: anonymous, file-backed, device-backed.
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The Linux kernel can alter how file-backed and anonymous mapped pages are stored by moving them back and forth between RAM and disk. This is referred to as "swapping". Read [[how-linux-uses-swap]]#
- McKay, D. (2019, December 9). What Is Swappiness on Linux? (and How to Change It). How-To Geek. https://www.howtogeek.com/449691/