Hi Tomasz, Yeah, the comments are wrong, i will correct it >> + */ >> + pages = (unsigned int *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 3); > > This is rather unfortunate and you should expect failures here on > actively used systems with uptime longer than few hours. Changing this > to dma_alloc_coherent() and enabling CMA _might_ give you a bit better > success rate, but... > > Normally, this kind of (scatter-gather capable) hardware would allow > some kind of linking of separate pages, e.g. last entry in the page > would point to the next page, or something like that. Doesn't this RGA > block have something similar? > Thx for pointing it out ! : ) I looked RGA drvier used in rockchip android and i find it use kmalloc, so i think it might support separate pages. I will test it. > Best regards, > Tomasz
