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author | Eric Dumazet <edumazet@google.com> | 2024-03-28 17:40:32 +0300 |
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committer | Jakub Kicinski <kuba@kernel.org> | 2024-03-30 01:03:11 +0300 |
commit | 1abe267f173eae7ae76cf56232292e9641eb652f (patch) | |
tree | b8f7952bdc3936448e9ee4da907745b2f9c1a7f8 /net/8021q | |
parent | 612b1c0dec5bc7367f90fc508448b8d0d7c05414 (diff) | |
download | linux-1abe267f173eae7ae76cf56232292e9641eb652f.tar.xz |
net: add sk_wake_async_rcu() helper
While looking at UDP receive performance, I saw sk_wake_async()
was no longer inlined.
This matters at least on AMD Zen1-4 platforms (see SRSO)
This might be because rcu_read_lock() and rcu_read_unlock()
are no longer nops in recent kernels ?
Add sk_wake_async_rcu() variant, which must be called from
contexts already holding rcu lock.
As SOCK_FASYNC is deprecated in modern days, use unlikely()
to give a hint to the compiler.
sk_wake_async_rcu() is properly inlined from
__udp_enqueue_schedule_skb() and sock_def_readable().
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20240328144032.1864988-5-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/8021q')
0 files changed, 0 insertions, 0 deletions