github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-13 00:28:54 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

macvlan: avoid spinlock contention in macvlan_broadcast_enqueue()

Browse Source 
Under high stress, we spend a lot of time cloning skbs,
then acquiring a spinlock, then freeing the clone because
the queue is full.

Add a shortcut to avoid these costs under pressure.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260401103809.3038139-3-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2026-04-01 10:38:09 +00:00 committed by Jakub Kicinski
parent 1ef5789d99
commit 0d5dc1d7aa
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/macvlan.c
View File

@ -360,6 +360,9 @@ static void macvlan_broadcast_enqueue(struct macvlan_port *port,
struct sk_buff *nskb;
int err = -ENOMEM;
if (skb_queue_len_lockless(&port->bc_queue) >= bc_queue_len_used)
goto err;
nskb = skb_clone(skb, GFP_ATOMIC);
if (!nskb)
goto err;