Re: tentitive complete patch for MAP_GUARDED available

[Matthew Dillon]

:Currently, the threads library only creates one guard page
:at the top (or bottom depending on how you look at it) of
:each threads stack (for stacks of default size).  Thread
:stacks are allocated in sequential zones, so they are always
:placed on top of the previous threads stack, and thus already
:have a guard page below the stack.
:
:Correct me if I'm wrong, but using MAP_STACK|MAP_GUARDED
:would allocate one additional guard page for each threads
:stack.
:
:DanE.

    Correct.  At the moment MAP_GUARDED is a 'generic' guarding flag
    and makes no assumptions about the areas being adjoining.  It doesn't
    cost us anything.

                                        -Matt
                                        Matthew Dillon 
                                        <[EMAIL PROTECTED]>


To Unsubscribe: send mail to [EMAIL PROTECTED]
with "unsubscribe freebsd-current" in the body of the message