Re: Some experience with the igc branch

[Helmut Eller]

On Wed, Dec 25 2024, Gerd Möllmann wrote:

> A problem occurs only, apparently (I've not read the MPS code), when the
> barrier handling code in MPS is called while being in another signal
> handler like Emacs' SIGPROF handler.
>
>
> I don't know what exactly the problem is in the end, in MPS. That would
> be a good question for Richard Brooksby, I think.

The problem is probably simply that MPS uses a non-recursive lock.  The
SIGSEGV signal handler can't claim the lock when it's already claimed.

See:
https://memory-pool-system.readthedocs.io/en/latest/design/arena.html#locks

Helmut