[PATCH v2 nf-next] ipvs: Move defense_work and est_reload_work to system_dfl_long_wq
From: Ismael Luceno <hidden>
Date: 2026-07-02 10:11:09
Also in:
lkml, lvs-devel, netfilter-devel
Subsystem:
ipvs, netfilter, networking [general], the rest · Maintainers:
Simon Horman, Julian Anastasov, Pablo Neira Ayuso, Florian Westphal, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Under synflood conditions binding these handlers to system_long_wq may pin them to a saturated CPU. We've observed improved throughtput on a DPDK/VPP application with this change, which we attribute to the reduced context switching. Neither handler has per-CPU data dependencies nor cache locality requirements that would prevent this change. Signed-off-by: Ismael Luceno <redacted> --- CC: Marco Crivellari <redacted> CC: Tejun Heo <tj@kernel.org> Changes since v1: * Rebased on nf-next * Reworded commit message net/netfilter/ipvs/ip_vs_ctl.c | 6 +++--- net/netfilter/ipvs/ip_vs_est.c | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index bcf40b8c41cf..d7e669efab4d 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c@@ -235,7 +235,7 @@ #define DEFENSE_TIMER_PERIOD 1*HZ update_defense_level(ipvs); if (atomic_read(&ipvs->dropentry)) ip_vs_random_dropentry(ipvs); - queue_delayed_work(system_long_wq, &ipvs->defense_work, + queue_delayed_work(system_dfl_long_wq, &ipvs->defense_work, DEFENSE_TIMER_PERIOD); } #endif
@@ -290,7 +290,7 @@ #define DEFENSE_TIMER_PERIOD 1*HZ atomic_set(&ipvs->est_genid_done, genid); if (repeat) - queue_delayed_work(system_long_wq, &ipvs->est_reload_work, + queue_delayed_work(system_dfl_long_wq, &ipvs->est_reload_work, delay); unlock:
@@ -5126,7 +5126,7 @@ do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) goto err; /* Schedule defense work */ - queue_delayed_work(system_long_wq, &ipvs->defense_work, + queue_delayed_work(system_dfl_long_wq, &ipvs->defense_work, DEFENSE_TIMER_PERIOD); return 0;
diff --git a/net/netfilter/ipvs/ip_vs_est.c b/net/netfilter/ipvs/ip_vs_est.c
index ab09f5182951..78964aa861e9 100644
--- a/net/netfilter/ipvs/ip_vs_est.c
+++ b/net/netfilter/ipvs/ip_vs_est.c@@ -243,7 +243,7 @@ #define pr_fmt(fmt) "IPVS: " fmt /* Bump the kthread configuration genid if stopping is requested */ if (restart) atomic_inc(&ipvs->est_genid); - queue_delayed_work(system_long_wq, &ipvs->est_reload_work, 0); + queue_delayed_work(system_dfl_long_wq, &ipvs->est_reload_work, 0); } /* Start kthread task with current configuration */