netdev - Re: [ISSUE: sky2 - rx error] Link stops working under heavy traffic load connected to a mv88e6176

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 26 May 2017 12:13:03 +0200
From:   Rafa Corvillo <rafael.corvillo@...fes.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Stephen Hemminger <stephen@...workplumber.org>,
        netdev@...r.kernel.org
Subject: Re: [ISSUE: sky2 - rx error] Link stops working under heavy traffic
 load connected to a mv88e6176

As modifying sky2 code I have not could get any solution, then I have 
modified some parameters on the ethernet interface and using a MTU = 
1503 and disabling TSO (TCP Segmentation Offload) mechanism all 
communication errors disappear, both the rx errors due to too long 
packets and tx timeout errors. I have performed iperf tests during 1 
hour (downstream and upstream) and the performance of the ethernet is 
stable. Furthermore, disabling SG (scatter-gather) improves the 
throughput of the ethernet interface with traffic upstream.

Is it possible that these offload mechanism don't work fine with the 
sky2 driver?

Thanks,

Rafa