On Thu, 17 Dec 2020 12:40:26 -0800 Ben Greear wrote:

On 12/17/20 10:20 AM, Eric Dumazet wrote:

quoted

On Thu, Dec 17, 2020 at 7:13 PM Ben Greear [off-list ref] wrote:  

quoted

It is the iwlwifi/mvm logic that supports ax200.  

Let me ask again :

I see two different potential call points :

drivers/net/wireless/intel/iwlwifi/pcie/tx.c:1529:
tso_build_hdr(skb, hdr_page->pos, &tso, data_left, !total_len);
drivers/net/wireless/intel/iwlwifi/queue/tx.c:427:
tso_build_hdr(skb, hdr_page->pos, &tso, data_left, !total_len);

To the best of your knowledge, which one would be used in your case ?

Both are horribly complex, I do not want to spend time studying two
implementations.  

It is the queue/tx.c code that executes on my system, verified with
printk.

Not sure why Intel's not on CC here. 

Luca, is the ax200 TSO performance regression with recent kernel on your
radar?