Hi All, As you might have noticed Enrico added RFC7440 support to our TFTP support. This greatly improves the speed for TFTP transfers when the server also has RFC7440 support. RFC7440 support has just appeared in the latest atftpd release (version 0.8.0), so you can give this a try without locally patched TFTP demons. This release is also available in debian backports. Unfortunately there's no light without shadow. On i.MX6 the FEC ethernet controller is too slow to catch up with a gigabit link. Up to now this hasn't been a problem on barebox, as we only ever had a single packet in flight. Now with windowsize support the controller can get overwhelmed with so many TFTP packets that RX overruns occur. I changed the imx_v7_defconfig to limit the windowsize to a smaller value that seems to work here. Similar problems might exist on other ethernet controllers, so we might have to generally switch to more conservative default window sizes. Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
