Michael> Will this break libibverbs on older kernels that don't
Michael> have madvise? Maybe test MADV_DONTFORK during library
Michael> startup and set a flag?
All kernels have madvise() -- the only question is whether they
support MADV_DONTFORK. The cost on kernels that don't is a system
call to return -EINVAL.
It might be worth setting a flag on library initialization to save all
the system calls. But maybe not.
- R.
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