10:37 <mrutland> arnd: broonie: in case it is of any use, my dodgy script for downloading the korg cross toolchains for a given release: https://paste.debian.net/1240427/

10:47 <mrutland> looks like GCC 12 doesn't like the way we (ab)use flexible array definitions for section boundaries, but is otherwise happy with defconfig

11:01 <arnd> mrutland: thanks for the script! I previously tried to come up with a helper that we could include in the kernel tree to install a toolchain for ${ARCH} locally, but failed to come up with a good way to pick the latest stable version of the compiler using only wget, bash and coreutils

11:02 <arnd> the "lynx -dump -listonly" trick looks nice, but it adds a dependency

11:10 <HdkR> How soon until we have LPA2 CPUs on the market? I obviously need more virtual address space. https://cdn.discordapp.com/attachments/702130548419723294/973539532014231603/Screen_Shot_2022-05-10_at_3.54.32_AM.png

11:45 <arnd> HdkR: I don't think LPA2 helps you at all if you are looking for larger virtual space, this is for a larger physical space, which is not visible to userland at all

12:09 <HdkR> arnd: The feature calls out VA specifically, "Allows a larger VA space for each translation table base register of up to 52 bits when using the 4KB or 16KB translation granules."

12:09 <HdkR> and I of course need 4k pages :)

12:20 <arnd> HdkR: ok, I see it now. It looks like that also requires 5-level translation tables, which Linux doesn't do on arm64

12:20 <HdkR> Nice

12:23 <arnd> HdkR: what is the actual requirement? Do you need just a little more than the 47 bits that an x86 program gets, or do you actually need the entire 52 bit space?

12:25 <HdkR> Nah, don't actually need 52-bit. Joking since I need to reserve up to 256TB (subtract 4GB) of VA on application start which burns a decent amount of startup time.

12:30 <HdkR> For something like a bash script running the VA reservation dominates execution time. It's pretty cute.

12:31 <HdkR> bunch of time application executions

12:31 <HdkR> s/time/tiny

13:26 <arnd> HdkR: is that 256TB reservation still needed just because we never created a syscall to limit VA space, or it that something else?

14:45 <CounterPillow> How can I make my second dt schema example not use the includes from the first example?

14:49 <CounterPillow> looks like the answer is "you can't", judging by this just throwing it all into one file :( https://github.com/devicetree-org/dt-schema/blob/5f2eddc9d6583e8966b79b881abff869a6ff79ae/tools/dt-extract-example

14:52 <robher> CounterPillow: Right. It's on my todo list to make each example independent. It's not primarily because that would complicate the make dependencies.

14:53 <CounterPillow> I see, thank you

17:50 <HdkR> arnd: Yes, that's exactly the case