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Date: -- (:)
From: Richard Jones <rich@a...>
Subject: Re: [Caml-list] More re GC hanging

On Sun, Aug 15, 2010 at 09:03:41AM +0200, Basile Starynkevitch wrote:
> On Sun, 2010-08-15 at 15:57 +1000, Paul Steckler wrote:
> > I haven't yet come up with a solution to the GC hanging problem I
> > mentioned the other day.
> > 
> > But here's something that looks funny. [..]
> 
> > After turning on the Gc verbose option, I see:
> 
> [...]
> >  !<>Sweeping 9223372036854775807 words
> >  Starting new major GC cycle
> >  Marking 9223372036854775807 words
> >  Subphase = 10
> >  Sweeping 9223372036854775807 words
> > 
> > Those are some big mark and sweep numbers at the end!
> 
> I guess this is related to the fact that recent Linux kernel have turned
> on the randomize virtual address space feature -designed to improve
> system security. You could disable it by 
>   echo 0 > /proc/sys/kernel/randomize_va_space
> but first learn more about it.
> 
> I believe recent Ocaml versions (did you try 3.12?) have GC improvements
> for that.

Would that be:
https://bugzilla.redhat.com/show_bug.cgi?id=445545
(fixed in OCaml 3.11)?

Rich.

-- 
Richard Jones
Red Hat