Re: TCP transmit performance regression

Eric Dumazet
2012-07-05T14:28:53Z

On Thu, 2012-07-05 at 22:01 +0800, Ming Lei wrote:

> Basically, copy path will be bypassed since hard_header_len
> has included the 'overhead' already.

Unfortunately this is not done correctly.

needed_headroom should be set to SMSC95XX_TX_OVERHEAD_CSUM