Michael> It is actually possible: You can use malloc hooks to set
    Michael> the madvise flag for all allocated memory. This will
    Michael> include memory allocated by libibverbs and its plugins
    Michael> and memory you are going to register.

...and also all the memory that the child process you fork() might
want to use.  But if you're really desperate you could try to do it I
guess.

If all you care about is system()/fork()+exec(), then be aware that
RHEL5 has a new enough kernel so that will work without doing anything.

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