Joe Damato 18e2bf0edf
eventpoll: Add epoll ioctl for epoll_params ...
Add an ioctl for getting and setting epoll_params. User programs can use
this ioctl to get and set the busy poll usec time, packet budget, and
prefer busy poll params for a specific epoll context.
Parameters are limited:
- busy_poll_usecs is limited to <= s32_max
- busy_poll_budget is limited to <= NAPI_POLL_WEIGHT by unprivileged
users (!capable(CAP_NET_ADMIN))
- prefer_busy_poll must be 0 or 1
- __pad must be 0
Signed-off-by: Joe Damato <jdamato@fastly.com >
Acked-by: Stanislav Fomichev <sdf@google.com >
Reviewed-by: Jiri Slaby <jirislaby@kernel.org >
Reviewed-by: Eric Dumazet <edumazet@google.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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