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bitbake: Use a "fork" multiprocessing context

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Python 3.14 changes the default multiprocessing context from "fork" to
"forkserver"; however bitbake heavily relies on "fork" to efficiently
pass data to the child processes. As such, make "fork" context in the bb
namespace and use it in place of the normal multiprocessing module.

Note that multiprocessing contexts were added in Python 3.4, so this
should be safe to use even before Python 3.14

[YOCTO #15858]

(Bitbake rev: 0d9d8d0863e82e986c33c08064ce9a99224a06d5)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
This commit is contained in:
Joshua Watt
2025-08-22 00:40:37 +02:00
committed by Steve Sakoman
parent 5495d8b6ff
commit ec065ce64c
7 changed files with 35 additions and 9 deletions
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bitbake/lib/hashserv/tests.py
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@@ -10,7 +10,7 @@ from .server import DEFAULT_ANON_PERMS, ALL_PERMISSIONS
from bb.asyncrpc import InvokeError
import hashlib
import logging
import multiprocessing
from bb import multiprocessing
import os
import sys
import tempfile