Supporting Linux kernel development in Rust

Re:Supporting Linux kernel development in Rust by jcranmer on Monday August 31, 2020 @05:01PM (#24335905)

> unless you want to use cross-language LTO (which we'll eventually want to do, but it won't be a hard requirement for a working kernel).

Does Linux even work with LTO right now? It seems to do a lot of weird-linking-magic things that I wouldn't expect to work well with LTO.

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Re:Supporting Linux kernel development in Rust by geofft on Monday August 31, 2020 @09:22PM (#24337595)

There was a talk right after ours about LTO! I only half paid attention to it because I was catching up on the chat, but it sounds like Google is doing kernel LTO in prod for their internal systems (and maybe also for Android and CrOS?):

https://linuxplumbersconf.org/event/7/contributions/798/ (slide link at the bottom)

https://youtu.be/FFjV9f_Ub9o?t=3844

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Re:Supporting Linux kernel development in Rust by JoshTriplett on Monday August 31, 2020 @05:05PM (#24335959)

At the moment, I believe the Linux kernel can do LTO with some additional patches, but there are still regular issues. It isn't nearly as well supported as Clang or LLD yet.

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Re:Supporting Linux kernel development in Rust by danudey on Wednesday September 02, 2020 @02:51PM (#24356460)

ICYMI, Microsoft is putting a lot of eggs into the LTO/PGO basket to try to improve Linux performance: https://www.phoronix.com/scan.php?page=news_item&px=Microsof...

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