Re: [PATCH net-next] amd-xgbe: add robust link-down TX queue handling

[Paolo Abeni]

On 3/13/26 2:46 PM, Raju Rangoju wrote:
> Add comprehensive link-down handling to improve driver robustness and
> enable fast recovery from link failures. Currently, the driver lacks
> proper cleanup mechanisms when the physical link goes down with
> packets in-flight, which can impact network stability and failover
> performance.
> 
> This enhancement adds intelligent TX queue management during link state
> transitions:
> 
> Link-down detection improvements:
>   - Adaptive polling: 100ms intervals when carrier is up for fast
>     link-down detection, vs 1000ms when down to conserve CPU
>   - Enables ~100-200ms link-down response time (10x improvement)
> 
> Smart TX queue handling:
>   - Immediate TX queue stop on link-down to halt new submissions
>   - Skip futile hardware drain attempts when link is already down
>   - Force-cleanup abandoned TX descriptors that hardware won't complete
>   - Proper descriptor and skb resource reclamation

It looks like this one should be split in multiple patches, to better
isolate each specific improvements.

/P