On Mon, Sep 14, 2026 at 09:49:50AM -0700, H. Peter Anvin wrote: > On September 14, 2026 9:39:07 AM PDT, Kees Cook <[email protected]> wrote: > [...] > >diff --git a/tools/lib/python/jobserver.py b/tools/lib/python/jobserver.py > >index 0b1ffdf9f7a3..fc38c5020b22 100755 > >--- a/tools/lib/python/jobserver.py > >+++ b/tools/lib/python/jobserver.py > >@@ -29,6 +29,11 @@ $claim child to do the actual work. > > The end goal here is to keep the total number of build tasks under the > > limit established by the initial ``make -j$n_proc`` call. > > > >+Setting the ``SINGLE_THREADED`` environment variable skips the reservation > >+entirely and runs the command with ``PARALLELISM=1``. This is meant for > >callers > >+that run many short commands in parallel themselves, where each one should > >use > >+only the job slot it already holds. > >+ > > See: > > > > https://www.gnu.org/software/make/manual/html_node/POSIX-Jobserver.html#POSIX-Jobserver > > """ > >@@ -68,6 +73,13 @@ class JobserverExec: > > self.is_open = True # We only try once > > self.claim = None > > # > >+ # SINGLE_THREADED asks for no reservation at all: the command runs > >+ # with PARALLELISM=1, using only the slot its caller already holds. > >+ # > >+ if os.environ.get('SINGLE_THREADED'): > >+ self.claim = 1 > >+ return > >+ # > > # Check the make flags for "--jobserver=R,W" > > # Note that GNU Make has used --jobserver-fds and --jobserver-auth > > # so this handles all of them. > > > > If we are going to add dependencies, can we add *any* scripting language that > is less stone tablet than POSIX awk?
What are you referring to here? The jobserver logic is all Python. -- Kees Cook
