diff options
| author | Eric Dumazet <edumazet@google.com> | 2025-11-06 08:55:00 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-11-07 19:00:16 -0800 |
| commit | fd9557c3606bb683c01a6c7627e915b539b9a8df (patch) | |
| tree | ee565f803ce1408d888e258a43cea24f212fef91 /net/core/dev.c | |
| parent | 01c87d7f48b4f9b8be0950ed4de5d345632bd564 (diff) | |
net: add prefetch() in skb_defer_free_flush()
skb_defer_free_flush() is becoming more important these days.
Add a prefetch operation to reduce latency a bit on some
platforms like AMD EPYC 7B12.
On more recent cpus, a stall happens when reading skb_shinfo().
Avoiding it will require a more elaborate strategy.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Link: https://patch.msgid.link/20251106085500.2438951-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/core/dev.c')
| -rw-r--r-- | net/core/dev.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 537aa43edff0..69515edd17bc 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -6782,6 +6782,7 @@ static void skb_defer_free_flush(void) free_list = llist_del_all(&sdn->defer_list); llist_for_each_entry_safe(skb, next, free_list, ll_node) { + prefetch(next); napi_consume_skb(skb, 1); } } |