On Mon, Jun 26, 2017 at 02:53:14PM -0500, Benjamin Kaduk wrote: > On Sun, Jun 25, 2017 at 11:41 AM, Konstantin Belousov <kostikbel_at_gmail.com> > wrote: > > > 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 > > > > > I managed to get the "Cannot allocate red zone for initial thread" at the > start of installworld (doing CC feature detection, IIRC) going from r306247 > to r320328. > > Is it worth trying that patch out? Ensure that you run a kernel past r320344 and then show me ktrace of the failing process.Received on Mon Jun 26 2017 - 18:25:31 UTC
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