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ipv6: anycast: use call_rcu_hurry() in aca_put()

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This is a followup of commit b5327b9a30 ("ipv6: use
call_rcu_hurry() in fib6_info_release()").

I had another pmtu.sh failure, and found another lazy
call_rcu() causing this failure.

aca_free_rcu() calls fib6_info_release() which releases
devices references.

We must not delay it too much or risk unregister_netdevice/ref_tracker
traces because references to netdev are not released in time.

This should speedup device/netns dismantles when CONFIG_RCU_LAZY=y

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2024-04-29 18:36:43 +00:00 committed by David S. Miller
parent c2e6a872bd
commit fff6e6accd
1 changed files with 2 additions and 3 deletions
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5
net/ipv6/anycast.c
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@ -252,9 +252,8 @@ static void aca_free_rcu(struct rcu_head *h)
static void aca_put(struct ifacaddr6 *ac)
{
if (refcount_dec_and_test(&ac->aca_refcnt)) {
call_rcu(&ac->rcu, aca_free_rcu);
}
if (refcount_dec_and_test(&ac->aca_refcnt))
call_rcu_hurry(&ac->rcu, aca_free_rcu);
}
static struct ifacaddr6 *aca_alloc(struct fib6_info *f6i,