u-skip-main-thread-stack-guard

u-skip-main-thread-stack-guard

commit be509b3387aebb453b09a4942cf902c7d05a0f1e
Author: Josh Stone <jistone@redhat.com>
Date:   Wed Jul 5 12:03:17 2017 -0700

    Skip the main thread's manual stack guard on Linux

    Linux doesn't allocate the whole stack right away, and the kernel has
    its own stack-guard mechanism to fault when growing too close to an
    existing mapping.  If we map our own guard, then the kernel starts
    enforcing a rather large gap above that, rendering much of the possible
    stack space useless.

    Instead, we'll just note where we expect rlimit to start faulting, so
    our handler can report "stack overflow", and trust that the kernel's own
    stack guard will work.

    Fixes #43052.

Gbp-Pq: Name u-skip-main-thread-stack-guard.patch