On 2022/10/26 22:00, Gal Pressman wrote: > On 18/11/2021 14:12, Guangbin Huang wrote: >> From: Hao Chen <chenhao288@xxxxxxxxxxxxx> >> >> This series add support to set/get tx copybreak buf size and rx buf len via >> ethtool and hns3 driver implements them. >> >> Tx copybreak buf size is used for tx copybreak feature which for small size >> packet or frag. Use ethtool --get-tunable command to get it, and ethtool >> --set-tunable command to set it, examples are as follow: >> >> 1. set tx spare buf size to 102400: >> $ ethtool --set-tunable eth1 tx-buf-size 102400 >> >> 2. get tx spare buf size: >> $ ethtool --get-tunable eth1 tx-buf-size >> tx-buf-size: 102400 > > Hi Guangbin, > Can you please clarify the difference between TX copybreak and TX > copybreak buf size? Hi Gal, 'TX copybreak buf size' is the size of buffer allocated to a queue in order to support copybreak handling when skb->len <= 'TX copybreak', see hns3_can_use_tx_bounce() for 'TX copybreak' and hns3_init_tx_spare_buffer() for 'TX copybreak buf size'. > . >
