Date: Mon, 14 Nov 2005 13:39:19 -0700 From: John Giacomoni <John.Giacomoni@colorado.edu> To: freebsd-hackers@freebsd.org Subject: Sharing the same VM address space between Kernel and UserSpace Message-ID: <AA4AEE17-32CC-4D47-96C0-0B0B0BC13B68@colorado.edu>
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I am in need of a way to share memory between kernel space and possibly multiple different user-space processes for an extended period of time. This memory would need to be a single unpageable region. I am using the vm routines as cribbed from mmap, however I'd like the address spaces to be viewed as the same regardless of which process I'm in to avoid swizzling pointers as I'm storing data structures in the shared memory region. I imagine I'd need to find a way to expose part of the kernel address space to user space to accomplish this. Is there a way to do this? thanks John G -- John.Giacomoni@colorado.edu University of Colorado at Boulder Department of Computer Science Engineering Center, ECCR 1B05 430 UCB Boulder, CO 80303-0430 USA
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