On Tue, Feb 8, 2011 at 02:42, Nikolaus Rath <Nikolaus@xxxxxxxx> wrote:
> I figured this one out myself, get_user_pages and dma_map_page do not
> create a mapping in kernel space for the buffer.
uhm, I recall when I read the get_user_pages function, it's kinda
"please pin those pages in RAM, don't let it paged out"....but the
mapping is still in user space AFAIK
>With
>
> info("VI Start: 0x%0x", ((uint32_t*) kmap(acq_dev->vi_pg))[0]);
> kunmap(acq_dev->vi_pg);
Nice!
> it works just fine. And for some reason, now my original problem has
> magically disappeared as well. Maybe it got scared by the suddenly
> immediate threat of being debugged :-).
If this is Facebook, I'll put "Like (this post)" on your post above :D
--
regards,
Mulyadi Santosa
Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com
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