Messages in this thread | | | Date | Sat, 20 Mar 2004 14:45:18 -0800 | From | William Lee Irwin III <> | Subject | Re: can device drivers return non-ram via vm_ops->nopage? |
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On Sat, Mar 20, 2004 at 08:44:44PM +0100, Jaroslav Kysela wrote: >> Yes, I'm sorry about that, but the ->nopage usage was requested by Jeff >> Garzik and we're not gurus for the VM stuff. Because we're probably first >> starting using of this mapping scheme, it resulted to problems.
On Sat, Mar 20, 2004 at 10:23:41PM +0000, Russell King wrote: > Well, I've been told to effectively screw my idea by David Woodhouse, > so may I make the radical suggestion that rm -rf linux/sound would > also fix the problem. No, didn't think that was acceptable either. > Ok, so, how the fsck do we fix the sound drivers? How do we mmap() > memory provided by dma_alloc_coherent() into user space portably? > It appears from what David Woodhouse has been going on about, even > providing an architecture dma_coherent_to_page() interface isn't > acceptable. > If we can't answer that question, we might as well remove ALSA and > OSS from the kernel because they are abusing existing kernel > interfaces in ways which can not be solved.
Is there any possibility of an extension to remap_area_pages() that could resolve this? I can't say I fully understood and/or remember the issue with it that you pointed out.
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