Re: [PATCH v2 21/21] kbuild: use pigz for gzip compression if available

[Kees Cook]

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 <kees@xxxxxxxxxx> 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