Re: [PATCH][RFC][0/4] InfiniBand userspace verbs implementation

From: Christoph Hellwig
Date: Mon Apr 25 2005 - 08:18:54 EST

On Mon, Apr 25, 2005 at 06:15:10AM -0700, Roland Dreier wrote:
> Does it seem reasonable to add a new system call to let userspace mark
> memory it doesn't want copied into forked processes? Something like
> long sys_mark_nocopy(unsigned long addr, size_t len, int mark)
> which would set VM_DONTCOPY if mark != 0, and clear it if mark == 0.
> A better name would be gratefully accepted...

add a new MAP_DONTCOPY flag and accept it in mmap and mprotect?

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