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Bun will abort on 64K page size kernel #6241
Description
What version of Bun is running?
1.0.3
What platform is your computer?
Linux 5.6.3 aarch64 unknown
What steps can reproduce the bug?
Run bun on a kernel with arm64 CPU that supports 64K page size, and then enable 64K page size for the Linux kernel.
getconf PAGESIZE
65536With such kernel, even an extremely simple Hello world server would result in exit-code aborted:
The hello.js
Bun.serve({
port: 8080,
fetch(request) {
return new Response("Hello world");
},
});The result:
~/.bun/bin/bun run hello.js
Aborted
What is the expected behavior?
Bun should not crash
What do you see instead?
Bun crashed with exit code aborted
Additional information
I'm not 100% sure if it is related to 64K page size, but I have tested it on various arm64 boards I currently have, and it only aborts on the one with 64K kernel.
Reacted by Tiger Tang, Kenny Heitritter, gpsamson, Saagar Jha, seanmamasde and Francesco
Activity
Jarred-Sumner commentedon Aug 29, 2024
We have a lot of hardcoded constants that assume page size
RossComputerGuy commentedon Dec 17, 2024
I've noticed this on Ampere Altra as well running with a 64k page size.
nektro commentedon Jun 18, 2025
Zig updated its standard library to handle dynamic page sizes per target so this is now blocked on either jsc as it expects 16kb page size for this target unless compiled with a particular flag or we would have to offer a separate build
TigerHix commentedon Jul 3, 2025
Fix Bun crashes on ARM64 systems with 64K page sizes
github-actions commentedon Nov 25, 2025
Found 1 possible duplicate issue:
This issue will be automatically closed as a duplicate in 3 days.
🤖 Generated with Claude Code
dylan-conway commentedon Mar 23, 2026
Support for 64k page size will be added in the next release (v1.3.12). We patched JSC in #28345
190n commentedon Mar 23, 2026
Exciting! Wanna update #17627 too?
For those curious, the relevant WebKit-side changes are at oven-sh/WebKit#176 (the SHA change in #28345 is only adding that PR's merge commit). Will you be upstreaming this support?