>> kiobuf sounds perfect for a problem we have. Currently I use mmap() to map
>> pages from __get_free_pages() into user space for dma. This is not totally
>> satisfactory, tho, in part because the resulting group of pages is not mapped
>> contiguously into kernel.
Alan> If you have a situation where that is hard to handle you can vmalloc a block
Alan> of memory then map that into user space. drivers/char/bttv.c does it. Its
Alan> ugly and bttv needs to switch to kiovecs in 2.3.x if I get time.
Is vmalloc'd memory locked down and thus suitable for dma? Somehow I thought
it was paged...
>> Since we're going to ship a driver to customers, we can't use kiobuf unless
>> it is standard part of the kernel.
Alan> Whose kernel 8)
Why, everybody's of course :-)
--tony
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