[m-rev.] for review: Enable munmap support in Boehm GC by default.

[Julien Fischer]

Hi Peter,

On Thu, 23 Jul 2020, Peter Wang wrote:

> On Wed, 22 Jul 2020 22:18:12 +1000 Peter Wang <novalazy at gmail.com> wrote:
>> On Wed, 22 Jul 2020 21:54:49 +1000 Julien Fischer <jfischer at opturion.com> wrote:
>>>
>>>>
>>>> Some testing on my machine suggests that we can try enabling munmap
>>>> support by default:
>
> Unfortunately, I've found that by aggressively calling
> GC_gcollect_and_unmap() I can sometimes hit an abort:
>
>    mmap(PROT_NONE) failed
>
> I'm going to revert this change until I can figure it out.

Is this likely to be something that moving to the 8.0 branch would
address?

Julien.