From 4c853bf66f448fd186bafde5736592945d1693b1 Mon Sep 17 00:00:00 2001 From: Samiullah Khawaja Date: Thu, 10 Jul 2025 21:12:03 +0000 Subject: [PATCH] Add support to set NAPI threaded for individual NAPI A net device has a threaded sysctl that can be used to enable threaded NAPI polling on all of the NAPI contexts under that device. Allow enabling threaded NAPI polling at individual NAPI level using netlink. Extend the netlink operation `napi-set` and allow setting the threaded attribute of a NAPI. This will enable the threaded polling on a NAPI context. Add a test in `nl_netdev.py` that verifies various cases of threaded NAPI being set at NAPI and at device level. Tested ./tools/testing/selftests/net/nl_netdev.py TAP version 13 1..7 ok 1 nl_netdev.empty_check ok 2 nl_netdev.lo_check ok 3 nl_netdev.page_pool_check ok 4 nl_netdev.napi_list_check ok 5 nl_netdev.dev_set_threaded ok 6 nl_netdev.napi_set_threaded ok 7 nl_netdev.nsim_rxq_reset_down # Totals: pass:7 fail:0 xfail:0 xpass:0 skip:0 error:0 Signed-off-by: Samiullah Khawaja Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20250710211203.3979655-1-skhawaja@google.com Signed-off-by: Jakub Kicinski --- include/uapi/linux/netdev.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/uapi/linux/netdev.h b/include/uapi/linux/netdev.h index 3878bbd..4738614 100644 --- a/include/uapi/linux/netdev.h +++ b/include/uapi/linux/netdev.h @@ -134,6 +134,7 @@ enum { NETDEV_A_NAPI_DEFER_HARD_IRQS, NETDEV_A_NAPI_GRO_FLUSH_TIMEOUT, NETDEV_A_NAPI_IRQ_SUSPEND_TIMEOUT, + NETDEV_A_NAPI_THREADED, __NETDEV_A_NAPI_MAX, NETDEV_A_NAPI_MAX = (__NETDEV_A_NAPI_MAX - 1)