My apologies.  I only realized that we'd added the -vmthread flag
after you pointed out that  you couldn't reproduce the problem.

Thanks,
Yaron

On Tue, 27 Jul 2004 09:41:19 +0200, Xavier Leroy <xavier.leroy@inria.fr> wrote:
> > Interesting.  I can't replicate this on a stock ocaml toplevel.  It
> > does occur, however, on a toplevel with vmthreads compiled in.
> 
> Ah, you should have said that earlier.  With vmthreads, input_value
> and output_value go through an intermediate buffer which is a Caml string
> (this is required because vmthreads must avoid blocking I/O system
> calls, hence all I/O must be performed at the Caml level).  So, the
> size of the data written by output_value or read by input_value is
> limited by the maximal length of a Caml string.
> 
> This limitation of vmthreads isn't new in 3.08, it's been present from
> the beginning.
> 
> - Xavier Leroy
>

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