On 04/19/2017 01:52 AM, Neftin, Sasha wrote: > On 4/18/2017 22:05, Florian Fainelli wrote: >> On 04/18/2017 12:03 PM, Eric Dumazet wrote: >>> On Tue, 2017-04-18 at 11:18 -0700, Florian Fainelli wrote: >>>> Hi, >>>> >>>> I am using NFS over a NAT with two e1000e adapters and with eth1 being >>>> the LAN interface and eth0 the WAN interface. The kernel is Ubuntu's >>>> 16.10 kernel: 4.8.0-46-generic. The device doing NAT over NFS is just >>>> mounting a remote folder and doing normal execution/file accesses. It's >>>> enough to untar a file from this device onto a NFS share to expose the >>>> problem. >>>> >>>> The transmit hangs look like the ones below, doing a rmmod/insmod does >>>> not help eliminated the problem, nor does a power cycle. Stopping the >>>> NFS over NAT definitively does let the adapter recover. >>> Is this NFS over TCP or UDP ? >> This is NFS over TCP mounted with the following: >> >> type nfs >> (rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,port=2049,timeo=70,retrans=3,sec=sys,local_lock=none,addr=X.X.X.X) >> >> >> Thanks Eric! > > Please, try disable TCP segmentation offload: ethtool -K <adapter> tso off.
I am not able to reproduce the hangs with TSO turned off. Is there a specific patch you would want me to try? -- Florian
