Patch "tcp_metrics: do not create an entry from tcp_init_metrics()" has been added to the 5.15-stable tree

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This is a note to let you know that I've just added the patch titled

    tcp_metrics: do not create an entry from tcp_init_metrics()

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     tcp_metrics-do-not-create-an-entry-from-tcp_init_met.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 420dc90fe28f010a1da43274d71055c403080e5c
Author: Eric Dumazet <edumazet@xxxxxxxxxx>
Date:   Fri Sep 22 22:03:55 2023 +0000

    tcp_metrics: do not create an entry from tcp_init_metrics()
    
    [ Upstream commit a135798e6e200ecb2f864cecca6d257ba278370c ]
    
    tcp_init_metrics() only wants to get metrics if they were
    previously stored in the cache. Creating an entry is adding
    useless costs, especially when tcp_no_metrics_save is set.
    
    Fixes: 51c5d0c4b169 ("tcp: Maintain dynamic metrics in local cache.")
    Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
    Reviewed-by: David Ahern <dsahern@xxxxxxxxxx>
    Acked-by: Neal Cardwell <ncardwell@xxxxxxxxxx>
    Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index 940f75df19358..def337f72c860 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -478,7 +478,7 @@ void tcp_init_metrics(struct sock *sk)
 		goto reset;
 
 	rcu_read_lock();
-	tm = tcp_get_metrics(sk, dst, true);
+	tm = tcp_get_metrics(sk, dst, false);
 	if (!tm) {
 		rcu_read_unlock();
 		goto reset;



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