(let's expand the Cc a bit) On 10 February 2016 at 19:57, Andrew Lunn <and...@lunn.ch> wrote: > On Wed, Feb 10, 2016 at 07:40:54PM +0100, Thomas Schlöter wrote: >> >> > Am 08.02.2016 um 19:49 schrieb Thomas Schlöter <tho...@schloeter.net>: >> > >> > >> >> Am 07.02.2016 um 22:07 schrieb Thomas Schlöter <tho...@schloeter.net>: >> >> >> >> Am 07.02.2016 um 21:35 schrieb Andrew Lunn <and...@lunn.ch>: >> >>> >> >>>>> FWIW, we had a similar bug report in Debian recently: >> >>>>> https://lists.debian.org/debian-arm/2016/01/msg00098.html >> >>> >> >>> Hi Thomas >> >>> >> >>> I this thread, Ian Campbell mentions a patch. Please could you try >> >>> that patch and see if it fixes your problem. >> >>> >> >>> Thanks >> >>> Andrew >> >> >> >> Hi Andrew, >> >> >> >> I just applied the patch and the NAS is now running it. I???ll try to >> >> crash it tonight and keep you informed whether it worked. >> >> >> >> Thanks >> >> Thomas >> > >> > Hi Andrew, >> > >> > the patch did not fix the problem. After 1.2 GiB RX and 950 MiB TX, the >> > interface crashed again. >> > >> > Now I switched off RX/TX offload just to make sure we are talking about >> > the same problem. If we are, the interface should be stable without >> > offload, right? >> > >> > Thomas >> >> Okay, so I have installed ethtool and switched off all offload features >> available. Now the NAS is running rock solid for two days. I backed up my >> Mac using Time Machine / netatalk (450 GiB transferred) and some Linux >> machines via NFS (100 GiB total) without a problem. >> >> How much code is used for mv643xx offload functionality? >> Is it possible to debug things in the driver and figure out what happens >> during the crash? >> Is the hardware offload interface proprietary or reverse engineered or is it >> a well known API that can be analyzed? > > Hi Thomas > > Ezequiel Garcia probably knows this part of the driver and hardware > the best... >
The TCP segmentation offload (TSO) implemented in this driver is mostly a software thing. I'm CCing Karl and Philipp, who have fixed subtle issues in the TSO path, and may be able to help figure this one out. -- Ezequiel García, VanguardiaSur www.vanguardiasur.com.ar
