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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Any real benefit to enabling Multi-Gen LRU? (lemdro.id)

submitted 1 year ago by [email protected] to c/[email protected]

12 comments fedilink hide all child comments

In case you don't know Multi-Gen LRU is an alternative LRU implementation that optimizes page reclaim and improves performance under memory pressure. Page reclaim decides the kernel's caching policy and ability to overcommit memory. It directly impacts the kswapd CPU usage and RAM efficiency.

Has anyone enabled this feature on their machines? Have you noticed any performance gains or memory management improvements? It's developed by Google and is reportedly is being used in ChromeOS and Android.

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[–] [email protected] 2 points 1 year ago (1 children)

How do I enable it? I've been having huge issues with reclaiming swap and memory usage in general. Do I have to compile the kernel myself and if I do, where is the option located?

[–] [email protected] 2 points 1 year ago (1 children)

Check your running kernel's config at /proc/config (or config.gz) to see if it's enabled.

https://docs.kernel.org/admin-guide/mm/multigen_lru.html has admin/usage details.

If your current kernel doesn't build multi-gen LRU then you'll need to build a kernel package that does, or switch to one that enables it.

[–] [email protected] 1 points 1 year ago (1 children)

Ah, then where in the menuconfig is this option located, if I need to build my own kernel...

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago) (1 children)

Use the search function and look for LRU_GEN. Try make nconfig while you're at it, it's the new terminal config menu system.

[–] [email protected] 1 points 1 year ago

man, make nconfig is such a life savior when configuring a new kernel, it's great