Re: [PATCH net-next v6 3/4] eventpoll: Add per-epoll prefer busy poll option

[Jakub Kicinski]

On Mon,  5 Feb 2024 21:04:48 +0000 Joe Damato wrote:
> When using epoll-based busy poll, the prefer_busy_poll option is hardcoded
> to false. Users may want to enable prefer_busy_poll to be used in
> conjunction with gro_flush_timeout and defer_hard_irqs_count to keep device
> IRQs masked.
> 
> Other busy poll methods allow enabling or disabling prefer busy poll via
> SO_PREFER_BUSY_POLL, but epoll-based busy polling uses a hardcoded value.
> 
> Fix this edge case by adding support for a per-epoll context
> prefer_busy_poll option. The default is false, as it was hardcoded before
> this change.

Reviewed-by: Jakub Kicinski <kuba@xxxxxxxxxx>