Re: Current amd64 new error or warning from today's current with ruby r320323

On Sun, Jun 25, 2017 at 10:09:07AM -0700, Manfred Antar wrote:
> 
> > On Jun 25, 2017, at 9:41 AM, Konstantin Belousov <kostikbel_at_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 <kostikbel_at_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 root_at_pozo.com <mailto:root_at_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]
> (~)4934}
> 
> No more message. Do you want new ktrace ?

Thanks for testing.  You might post the trace.