Re: [PATCH, v3] shmat: introduce flag SHM_MAP_NOT_FIXED

[Alan Cox]

> > 	shmat giving an address
> > 	if error
> > 		shmat giving no address
> > 
> > from user space.
> 
> No you can't here because shmat() starts searching from the wrong
> start address.

If you are only hinting a desired address then that by the very meaning
of the word "hint" means you will accept a different one.

> The only way would be to search manually in /proc/self/maps
> and handle the races, but I hope you're not advocating that.

Gak, mmap a range to find a space and then shmat over the top of that.

Alan
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