On Fri, 29 Apr 2022 14:52:03 -0400 Don Wallwork <[email protected]> wrote:
> >>>> > >>>> The expectation is that use of this optional feature would be limited to > >>>> cases where the performance gains justify the implications of these > >>>> tradeoffs. For example, a specific data plane application may be okay > >>>> with limited stack size and could be tested to ensure stack usage > >>>> remains within limits. > > How to identify the required stack size and verify it... If aiming for > > small stacks, some instrumentation would be nice, like rte_mempool_audit() > > and rte_mempool_list_dump(). > Theoretically, a region of memory following the stack could be populated > with a poison pattern that could be audited. Not as robust as hw > mprotect/MMU, but it could provide some protection. > > Usually just doing mmap(.., PROT_NONE) will create a page that will cause SEGV on access which is what you want.
