As reported by Akira, using sphinx-build-wrapper serialize PDF builds. This patch addresses it as commented at the thread. The patch on this series comes after: https://lore.kernel.org/linux-doc/cover.1755258303.git.mchehab+huawei@xxxxxxxxxx/ I opted to send it in separate to avoid respining the entiire series just for a new patch at the end. Mauro Carvalho Chehab (1): scripts/sphinx-build-wrapper: allow building PDF files in parallel scripts/sphinx-build-wrapper | 141 ++++++++++++++++++++++++++--------- 1 file changed, 106 insertions(+), 35 deletions(-) -- 2.50.1