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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: 15d7448e04aa78c827d2cef9eb1a62bd6e0dd119)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Martin Jansa <martin.jansa@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 00:40:06 +02:00
committed by Steve Sakoman
parent 6400741e0c
commit f00c4968ff
7 changed files with 35 additions and 9 deletions
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bitbake/lib/bb/server/process.py
+1 -1
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@@ -13,7 +13,7 @@
import bb
import bb.event
import logging
import multiprocessing
from bb import multiprocessing
import threading
import array
import os