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Re: Introducing non-RAM managed page ("device page")
On Tue, Sep 15, 2009 at 04:04:15PM +0000, Eduardo Horvath wrote:
> We've handled mmap()ing device memory forever without getting VM involved.
> Not to imply that the current device mmap() interface could not be
> improved. What features of the VM subsystem do you think is needed to map
> device pages into processes?
This is *not* mmap on a device. It is mmap of a file stored on a special
device. In other words, read-only access to this device can be done
without the buffer cache and for that the VM subsystem needs glue.
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