Hi! I have an socfpga board, which uses has simple framebuffer implemented in the FPGA. On 3.15, framebuffer is fast: root@wagabuibui:~# time cat /dev/fb0 > /dev/null real 0m 0.00s user 0m 0.00s sys 0m 0.00s on 3.18, this takes 220msec. Similar slowdown exists for writes. Simple framebuffer did not change at all between 3.15 and 3.18; resource flags of the framebuffer are still same (0x200). If I enable caching on 3.18, it speeds up a bit, to 70msec or so... Which means problem is not only in caching. Any ideas? Best regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
