Article ID: 123127, created on Oct 10, 2014, last review on Oct 10, 2014

  • Applies to:
  • Virtuozzo 6.0

Symptoms

/var/log/messages contain a lot of entries like:

Sep 15 16:49:25 HWnode kernel: [1808967.247940] (null): Dropping TSO6 features since no CSUM feature.
Sep 18 07:34:26 HWnode kernel: [2035044.599321] (null): Dropping TSO6 features since no CSUM feature.
Sep 18 07:58:27 HWnode kernel: [2036486.710706] (null): Dropping TSO6 features since no CSUM feature.
Sep 18 07:58:29 HWnode kernel: [2036488.898175] (null): Dropping TSO6 features since no CSUM feature.

Cause

The message means that the hardware does not have the necessary checksumming features and therefore the kernel disables TSO6 features.

Support for TSO6 is introduced in RedHat kernel and is inherited by Virtuozzo kernels, it cannot be disabled from vzkernel side.

Resolution

The message is for information only and can be ignored.

Search Words

Dropping TSO6 features since no CSUM feature

TSO6

c62e8726973f80975db0531f1ed5c6a2 2897d76d56d2010f4e3a28f864d69223 0dd5b9380c7d4884d77587f3eb0fa8ef

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