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From: Florian Westphal <fw@strlen.de>
Date: Tue, 4 Jun 2024 16:08:48 +0200
Subject: [PATCH 2/3] net: tcp: un-pin the tw_timer
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.10/older/patches-6.10.2-rt14.tar.xz
After previous patch, even if timer fires immediately on another CPU,
context that schedules the timer now holds the ehash spinlock, so timer
cannot reap tw socket until ehash lock is released.
Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/20240604140903.31939-3-fw@strlen.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
net/ipv4/inet_timewait_sock.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/ipv4/inet_timewait_sock.c
+++ b/net/ipv4/inet_timewait_sock.c
@@ -203,7 +203,7 @@ struct inet_timewait_sock *inet_twsk_all
tw->tw_prot = sk->sk_prot_creator;
atomic64_set(&tw->tw_cookie, atomic64_read(&sk->sk_cookie));
twsk_net_set(tw, sock_net(sk));
- timer_setup(&tw->tw_timer, tw_timer_handler, TIMER_PINNED);
+ timer_setup(&tw->tw_timer, tw_timer_handler, 0);
/*
* Because we use RCU lookups, we should not set tw_refcnt
* to a non null value before everything is setup for this
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