On Tue, 2008-05-06 at 11:16 +0200, Gerhard Pircher wrote: > I can't answer this question. *ducked* :-) Takashi? > > FYI: I posted the results of the test with Takashi's dma_mmap_coherent > patch here: > http://ozlabs.org/pipermail/linuxppc-dev/2006-June/024078.html > > On the other side it looks like this problem does not only affect > ALSA. > As far as I can tell also some V4L(2) drivers have a problem with > mmaping > non coherent DMA allocations, but I'm not sure (it's a long time since > I > did some tests with video cards on my AmigaOne). > > Naturally I can do some tests, if you or Takashi come up with a new > patch.
Time that we sort that stuff out once for all.. sg allocations are usually lists of page, so virt_to_page shouldn't be a problem in the first place, though we still need some way to get the right prot attributes. Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
