Re: returning non-ram via ->nopage, was Re: [patch] mspec driver for 2.6.12-rc2-mm3

From: Christoph Hellwig
Date: Wed Apr 27 2005 - 10:58:54 EST

On Wed, Apr 27, 2005 at 11:53:15AM -0400, Jeff Garzik wrote:
> I don't see anything wrong with a ->nopage approach.
> At Linus's suggestion, I used ->nopage in the implementation of
> sound/oss/via82cxxx_audio.c.

The difference is that you return kernel memory (actually pci_alloc_consistant
memory that has it's own set of problems), while this is memory not in mem_map,
so he allocates some regularly kernel memory too to have a struct page and
just leaks it

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