[Bug 270250] Linuxulator: golang hangs on aarch64; futex related?

From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 15 Mar 2023 18:08:36 UTC

            Bug ID: 270250
           Summary: Linuxulator: golang hangs on aarch64; futex related?
           Product: Base System
           Version: CURRENT
          Hardware: arm64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: trasz@FreeBSD.org

On aarch64, Linux golang test suite hangs at various moments, usually starting
with the closure4.go test.  All of those hangs end up in binary in running
state, with two threads.  In some cases it doesn't happen to the test case
itself, but to the golang compiler.  I'm no longer observing the futex errors
which were reported by the same test suite on same aarch64 machine before; my
guess is there might be some kind of race condition in recently added aarch64
Linuxulator futex support?

On amd64 the problem doesn't seem to occur.

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