From: Eric Wong <normalperson@...>
Date: 2011-06-11T16:14:06+09:00
Subject: [ruby-core:36997] Re: [Ruby 1.9 - Feature #4614] [RFC/PATCH] thread_pthread.c: lower RUBY_STACK_MIN_LIMIT to 64K

Koichi Sasada <redmine@ruby-lang.org> wrote:
> GC eats large stack size if there are nested object (deep nested array
> and so on).  I'm not sure but I think this is why we allocate 512KB
> for stack.

Good point.  I didn't think of that (rare case for me).  We would need a
non-recursive implementation of gc_mark_children.

A simpler idea would be a dedicated marking thread with a deeper stack;
but I think that's ugly.

> Any comments?
> 
> I think that Thread.new should accept stack size.

I'm not sure what the API would be.  While it would help me, I think it
would be difficult to use and too low level for Ruby.

Meanwhile I can rebuild Ruby or use a trivial LD_PRELOAD:
http://yhbt.net/libministack.c

-- 
Eric Wong