Re: Network issue on 3.10 rcs, bisected

On Wed, May 29, 2013 at 4:37 AM, Joao Correia
[off-list ref] wrote:

Hello list

While trying the rc's for 3.10, i've stumbled upon a problem where
networking does not work at all. Iptables will show packet counts going up,
but nothing actually reaches the programs.

I'm running fedora under hyper-v 3 (a windows 2012 host). Only tested ipv4
traffic, and everything times out (ping, telnet to open ports) on both
directions. The networking devices come up apparently ok - has static ip
set, and dmesg shows no errors (although i don't have many debugging options
enabled).

I bisected this, and git blames commit
ec5f061564238892005257c83565a0b58ec79295 (net: ill link between CSUM and SG
features.). I can't revert it cleanly on current rc's.

Can you also send network features set on the device?
ethtool -k <dev>

Thanks,
Pravin.

Please find the attached config used, as well as lshw output. Logs show no
errors.

I'm willing and able to test fixes.

Thank you for your time,
Joao Correia
CIUBI
Universidade da Beira Interior
Portugal

On Wed, May 29, 2013 at 7:59 PM, Pravin Shelar [off-list ref] wrote:

On Wed, May 29, 2013 at 4:37 AM, Joao Correia
[off-list ref] wrote:

quoted

Hello list

While trying the rc's for 3.10, i've stumbled upon a problem where
networking does not work at all. Iptables will show packet counts going up,
but nothing actually reaches the programs.

I'm running fedora under hyper-v 3 (a windows 2012 host). Only tested ipv4
traffic, and everything times out (ping, telnet to open ports) on both
directions. The networking devices come up apparently ok - has static ip
set, and dmesg shows no errors (although i don't have many debugging options
enabled).

I bisected this, and git blames commit
ec5f061564238892005257c83565a0b58ec79295 (net: ill link between CSUM and SG
features.). I can't revert it cleanly on current rc's.

Can you also send network features set on the device?
ethtool -k <dev>

As requested:
Features for eth0:
rx-checksumming: off [fixed]
tx-checksumming: off
    tx-checksum-ipv4: off [fixed]
    tx-checksum-ip-generic: off [fixed]
    tx-checksum-ipv6: off [fixed]
    tx-checksum-fcoe-crc: off [fixed]
    tx-checksum-sctp: off [fixed]
scatter-gather: on
    tx-scatter-gather: on
    tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: off
    tx-tcp-segmentation: off [fixed]
    tx-tcp-ecn-segmentation: off [fixed]
    tx-tcp6-segmentation: off [fixed]
udp-fragmentation-offload: off [fixed]
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off [fixed]
rx-vlan-offload: off
tx-vlan-offload: on
ntuple-filters: off [fixed]
receive-hashing: off [fixed]
highdma: off [fixed]
tx-vlan-ctag-hw-insert: on [fixed]
rx-vlan-ctag-hw-parse: off [fixed]
rx-vlan-ctag-filter: off [fixed]
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
vlan-challenged: off [fixed]
tx-lockless: off [fixed]
netns-local: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: off [fixed]
tx-gre-segmentation: off [fixed]
tx-udp_tnl-segmentation: off [fixed]

18 more lines

On Wed, May 29, 2013 at 12:53 PM, Joao Correia
[off-list ref] wrote:

On Wed, May 29, 2013 at 7:59 PM, Pravin Shelar [off-list ref] wrote:

quoted

On Wed, May 29, 2013 at 4:37 AM, Joao Correia
[off-list ref] wrote:

quoted

Hello list

While trying the rc's for 3.10, i've stumbled upon a problem where
networking does not work at all. Iptables will show packet counts going up,
but nothing actually reaches the programs.

I'm running fedora under hyper-v 3 (a windows 2012 host). Only tested ipv4
traffic, and everything times out (ping, telnet to open ports) on both
directions. The networking devices come up apparently ok - has static ip
set, and dmesg shows no errors (although i don't have many debugging options
enabled).

I bisected this, and git blames commit
ec5f061564238892005257c83565a0b58ec79295 (net: ill link between CSUM and SG
features.). I can't revert it cleanly on current rc's.

Can you also send network features set on the device?
ethtool -k <dev>

As requested:
Features for eth0:
rx-checksumming: off [fixed]
tx-checksumming: off
    tx-checksum-ipv4: off [fixed]
    tx-checksum-ip-generic: off [fixed]
    tx-checksum-ipv6: off [fixed]
    tx-checksum-fcoe-crc: off [fixed]
    tx-checksum-sctp: off [fixed]
scatter-gather: on
    tx-scatter-gather: on
    tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: off
    tx-tcp-segmentation: off [fixed]
    tx-tcp-ecn-segmentation: off [fixed]
    tx-tcp6-segmentation: off [fixed]

35 more quoted lines

I could not reproduce it, I will try it on VM. Meanwhile can you turn
off feature "sg" and try same test ?

Thanks.

Thank you for your time,
Joao Correia
CIUBI
Universidade da Beira Interior
Portugal

On Thu, May 30, 2013 at 5:48 PM, Pravin Shelar [off-list ref] wrote:

On Wed, May 29, 2013 at 12:53 PM, Joao Correia
[off-list ref] wrote:

quoted

On Wed, May 29, 2013 at 7:59 PM, Pravin Shelar [off-list ref] wrote:

quoted

On Wed, May 29, 2013 at 4:37 AM, Joao Correia
[off-list ref] wrote:

quoted

Hello list

While trying the rc's for 3.10, i've stumbled upon a problem where
networking does not work at all. Iptables will show packet counts going up,
but nothing actually reaches the programs.

I'm running fedora under hyper-v 3 (a windows 2012 host). Only tested ipv4
traffic, and everything times out (ping, telnet to open ports) on both
directions. The networking devices come up apparently ok - has static ip
set, and dmesg shows no errors (although i don't have many debugging options
enabled).

I bisected this, and git blames commit
ec5f061564238892005257c83565a0b58ec79295 (net: ill link between CSUM and SG
features.). I can't revert it cleanly on current rc's.

Can you also send network features set on the device?
ethtool -k <dev>

As requested:
Features for eth0:
rx-checksumming: off [fixed]
tx-checksumming: off
    tx-checksum-ipv4: off [fixed]
    tx-checksum-ip-generic: off [fixed]
    tx-checksum-ipv6: off [fixed]
    tx-checksum-fcoe-crc: off [fixed]
    tx-checksum-sctp: off [fixed]
scatter-gather: on
    tx-scatter-gather: on
    tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: off
    tx-tcp-segmentation: off [fixed]

40 more quoted lines

Hello

Your hint was spot-on. With sg off, i can't reproduce the problem and
networking seems fine. It works fine either way on 3.9, so this is a
regression for 3.10.

Thank you very much for your assistance.
Joao Correia
CIUBI
Universidade da Beira Interior
Portugal

Thanks.

quoted

Thank you for your time,
Joao Correia
CIUBI
Universidade da Beira Interior
Portugal

On Thu, May 30, 2013 at 2:14 PM, Joao Correia
[off-list ref] wrote:

On Thu, May 30, 2013 at 5:48 PM, Pravin Shelar [off-list ref] wrote:

quoted

On Wed, May 29, 2013 at 12:53 PM, Joao Correia
[off-list ref] wrote:

quoted

On Wed, May 29, 2013 at 7:59 PM, Pravin Shelar [off-list ref] wrote:

quoted

On Wed, May 29, 2013 at 4:37 AM, Joao Correia
[off-list ref] wrote:

quoted

Hello list

While trying the rc's for 3.10, i've stumbled upon a problem where
networking does not work at all. Iptables will show packet counts going up,
but nothing actually reaches the programs.

I'm running fedora under hyper-v 3 (a windows 2012 host). Only tested ipv4
traffic, and everything times out (ping, telnet to open ports) on both
directions. The networking devices come up apparently ok - has static ip
set, and dmesg shows no errors (although i don't have many debugging options
enabled).

I bisected this, and git blames commit
ec5f061564238892005257c83565a0b58ec79295 (net: ill link between CSUM and SG
features.). I can't revert it cleanly on current rc's.

Can you also send network features set on the device?
ethtool -k <dev>

As requested:
Features for eth0:
rx-checksumming: off [fixed]
tx-checksumming: off
    tx-checksum-ipv4: off [fixed]
    tx-checksum-ip-generic: off [fixed]
    tx-checksum-ipv6: off [fixed]
    tx-checksum-fcoe-crc: off [fixed]
    tx-checksum-sctp: off [fixed]
scatter-gather: on
    tx-scatter-gather: on
    tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: off

48 more quoted lines

Nice.
but still this does not look right. Can you tell me driver for the nic?
`ethtool -i <dev>`

Thanks,
Pravin.

On Fri, May 31, 2013 at 12:13 AM, Pravin Shelar [off-list ref] wrote:

On Thu, May 30, 2013 at 2:14 PM, Joao Correia
[off-list ref] wrote:

quoted

On Thu, May 30, 2013 at 5:48 PM, Pravin Shelar [off-list ref] wrote:

quoted

On Wed, May 29, 2013 at 12:53 PM, Joao Correia
[off-list ref] wrote:

quoted

On Wed, May 29, 2013 at 7:59 PM, Pravin Shelar [off-list ref] wrote:

quoted

On Wed, May 29, 2013 at 4:37 AM, Joao Correia
[off-list ref] wrote:

quoted

Hello list

While trying the rc's for 3.10, i've stumbled upon a problem where
networking does not work at all. Iptables will show packet counts going up,
but nothing actually reaches the programs.

I'm running fedora under hyper-v 3 (a windows 2012 host). Only tested ipv4
traffic, and everything times out (ping, telnet to open ports) on both
directions. The networking devices come up apparently ok - has static ip
set, and dmesg shows no errors (although i don't have many debugging options
enabled).

I bisected this, and git blames commit
ec5f061564238892005257c83565a0b58ec79295 (net: ill link between CSUM and SG
features.). I can't revert it cleanly on current rc's.

Can you also send network features set on the device?
ethtool -k <dev>

As requested:
Features for eth0:
rx-checksumming: off [fixed]
tx-checksumming: off
    tx-checksum-ipv4: off [fixed]
    tx-checksum-ip-generic: off [fixed]
    tx-checksum-ipv6: off [fixed]
    tx-checksum-fcoe-crc: off [fixed]
    tx-checksum-sctp: off [fixed]
scatter-gather: on
    tx-scatter-gather: on

53 more quoted lines

ethtool -i eth0:
driver: hv_netvsc
version: 3.1
firmware-version: N/A
bus-info:
supports-statistics: no
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: no

Thanks,
Pravin.