Re: need help on "make -j" parameter, it will let the system hung easily.

[Eli Zaretskii]

> Date: Fri, 14 Dec 2012 20:37:54 +0400
> From: "Dmitry V. Levin" <address@hidden>
> 
> > >     make: More parallel jobs (-jN) than this platform can handle 
> > > requested.
> > >     make: Resetting to single job (-j1) mode.
> > 
> > I see no message like this in the current Make sources.  Maybe I'm
> > missing something.
> 
> That message comes from a vendor patched make, see
> http://pkgs.fedoraproject.org/cgit/make.git/plain/make-3.82-j8k.patch
> http://pkgs.fedoraproject.org/cgit/make.git/tree/make.spec#n291
> https://bugzilla.redhat.com/show_bug.cgi?id=142691
> https://bugzilla.redhat.com/show_bug.cgi?id=17374

Thanks.

I'd say this is a subtle bug in Make that should be solved in some
better way.  There's no relation whatsoever between the maximum length
of a pipe and the maximum number of parallel jobs that can be run on a
system, except an implementation detail of the GNU Make jobserver.
OTOH, I can easily imagine a system with more than 4K cores, where
such a limitation will really hurt.