> On Jun 25, 2017, at 9:41 AM, Konstantin Belousov <kostik...@gmail.com> wrote:
> On Sun, Jun 25, 2017 at 08:21:33AM -0700, Manfred Antar wrote:
>>> On Jun 25, 2017, at 7:50 AM, Konstantin Belousov <kostik...@gmail.com> 
>>> wrote:
>>> On Sun, Jun 25, 2017 at 07:43:25AM -0700, Manfred Antar wrote:
>>>> maybe message got reformatted in mail program (mac mail).
>>>> could you send me a tar file of the patch?
>>>> also not sure if ???patch -p1 <patchfile??? is the correct invocation of 
>>>> patch
>>>> you could cc r...@pozo.com <mailto:r...@pozo.com> , that way i have copy 
>>>> on freebsd box and on mac.
>>> https://people.freebsd.org/~kib/misc/vm2.1.patch 
>>> <https://people.freebsd.org/~kib/misc/vm2.1.patch>
>> OK patched and built new kernel \
>> rebooted,
>> same ruby message. So it must be a ruby thing.
>> new kdump.txt at http://www.pozo.com/kernel/kdump.txt 
>> <http://www.pozo.com/kernel/kdump.txt>
>> also i???ll put a copy of my kernel config in same directory:
>> http://www.pozo.com/kernel/pozo <http://www.pozo.com/kernel/pozo>
>> only one module is being loaded at boot:
>> (kernel)4908}kldstat
>> Id Refs Address            Size     Name
>> 1    5 0xffffffff80200000 10380a8  kernel
>> 2    1 0xffffffff8123a000 e13f50   nvidia.ko 
>> I can disable nvidia if it helps as I really only access this machine over 
>> the net or serial console.
> No need, I understood why MAP_STACK failed in this case, thanks to the
> ktrace log. This is indeed something ruby-specific, or rather, triggered
> by ruby special use of libthr. It is not related to the main stack
> split.
> It seems that ruby requested very small stack for a new thread, only 5
> pages in size.  This size caused the stack gap to be correctly calculated
> as having zero size, because the whole stack is allocated by initial grow.
> But then there is no space for the guard page, which caused mapping failure
> for it, and overall stack mapping failure.
> Try this.
> https://people.freebsd.org/~kib/misc/vm2.2.patch

Seems to have worked:

(~)4933}ruby -v
ruby 2.3.4p301 (2017-03-30 revision 58214) [amd64-freebsd12]

No more message. Do you want new ktrace ?

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