Extending MADV_PROTECT

[Konstantin Belousov]

On Thu, May 09, 2013 at 08:14:52AM -0400, John Baldwin wrote:
> > You mentioned a priority, and I think ability to pass a structure to the
> > sub-function of the syscall is better then carving bits in the int argument,
> > or introducing a new syscall.
> 
> I think the priority would still be a pprotect operation.  In some ways it would
> be nice to be able to do ioctls on processes and maybe this could be structured
> similarly?
> 
> int procctl(int pid, unsigned long cmd, ...)
> 
> (So it's basically ioctl but with the 'fd' replaced with 'pid'.  This would also
> mean that in the future with Robert's pdfork() you could perhaps have ioctl on
> a process fd just foward the request to procctl).

Yes, this is exactly what I mean.
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