Re: Git port to Debian SH4 may have trouble

From: Jeffrey Walton <noloader@gmail.com>
Date: Nov 29, 2022, 22:33 UTC
Message-ID: <CAH8yC8kpkcr3mk_XU-vz8QPX45O6K+bbfB8t_mRU37_R7=gDFQ@mail.gmail.com>
In-Reply-To: <Y4aEPpQsS8QxBYly@coredump.intra.peff.net>

On Tue, Nov 29, 2022 at 5:14 PM Jeff King <peff@peff.net> wrote:

Show 18 quoted lines

>
> On Tue, Nov 29, 2022 at 04:49:30PM -0500, Jeffrey Walton wrote:
>
> > > Just a hunch, but does:
> > >
> > >   git config --global pack.threads 1
> > >
> > > help? The delta resolution is multi-threaded, but nothing else in the
> > > clone should be.
> >
> > Yes, `git config --global pack.threads 1` allowed things to continue.
> > The check-out was successful.
>
> OK, that narrows it down. The question then is why threads don't work.
> Is there something broken with threading or luck primitives on that
> platform? Or are we doing something sketchy with concurrency that
> happens to work on Intel but not elsewhere, and we end up in some kind
> of deadlock?

Probably something broken with the port. Or that's what I would put my money on.

> I suspect if we want to know more, you'd need to use gdb to grab a
> backtrace for each of the threads during the hang to see what they're
> trying to do.

Yeah, so GDB won't install at the moment. I tried earlier today. It has some unsatisfied dependencies. Failure to build from source (FTBFS), iirc.

Jeff