bug#30364: 26.0.91; thread crash on macos

[Daniel Colascione]

On 02/19/2018 09:24 AM, Paul Eggert wrote:
> Eli Zaretskii wrote:
> > > Would you like me to vary it based on 32-bit vs 64-bit?
> > I think so, but I'd like to hear from others about this.  Paul,
> > Andreas, could you please comment?
>
> A 64-bit Emacs should need more stack space than a 32-bit Emacs, yes. It 
> wouldn't be double the space, since not everything on the stack is a 
> pointer or an EMACS_INT. If you really want to fine-tune it you can also 
> depend on the width of EMACS_INT. Getting it "just right" would be a bit 
> tricky.
>
> 8 MiB/thread for 64-bit Emacs sounds OK to me. I wouldn't cheap out on 
> 64-bit platforms.
What about just dedicating a thread to GC? We'd create it and have it 
wait on a condition variable. Any thread could signal the CV, block, and 
wait for GC to complete. It'd be pretty simple, I think, and unlike the 
"always GC on main thread" proposal, it wouldn't force everything on the 
main thread to be interruptible.