* [PATCH net-next 0/2] minor tcp io_uring zc optimisations @ 2023-05-15 16:06 Pavel Begunkov 2023-05-15 16:06 ` [PATCH net-next 1/2] net/tcp: don't peek at tail for io_uring zc Pavel Begunkov ` (2 more replies) 0 siblings, 3 replies; 12+ messages in thread From: Pavel Begunkov @ 2023-05-15 16:06 UTC (permalink / raw) To: io-uring, netdev, edumazet, davem, dsahern, kuba, pabeni; +Cc: Pavel Begunkov Patch 1 is a simple cleanup, patch 2 gives removes 2 atomics from the io_uring zc TCP submission path, which yielded extra 0.5% for my throughput CPU bound tests based on liburing/examples/send-zerocopy.c Pavel Begunkov (2): net/tcp: don't peek at tail for io_uring zc net/tcp: optimise io_uring zc ubuf refcounting net/ipv4/tcp.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) -- 2.40.0 ^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH net-next 1/2] net/tcp: don't peek at tail for io_uring zc 2023-05-15 16:06 [PATCH net-next 0/2] minor tcp io_uring zc optimisations Pavel Begunkov @ 2023-05-15 16:06 ` Pavel Begunkov 2023-05-15 17:27 ` David Ahern 2023-05-15 16:06 ` [PATCH net-next 2/2] net/tcp: optimise io_uring zc ubuf refcounting Pavel Begunkov 2023-05-17 7:40 ` [PATCH net-next 0/2] minor tcp io_uring zc optimisations patchwork-bot+netdevbpf 2 siblings, 1 reply; 12+ messages in thread From: Pavel Begunkov @ 2023-05-15 16:06 UTC (permalink / raw) To: io-uring, netdev, edumazet, davem, dsahern, kuba, pabeni; +Cc: Pavel Begunkov Move tcp_write_queue_tail() to SOCK_ZEROCOPY specific flag as zerocopy setup for msghdr->ubuf_info doesn't need to peek into the last request. Signed-off-by: Pavel Begunkov <[email protected]> --- net/ipv4/tcp.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 4d6392c16b7a..40f591f7fce1 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -1229,13 +1229,12 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) flags = msg->msg_flags; if ((flags & MSG_ZEROCOPY) && size) { - skb = tcp_write_queue_tail(sk); - if (msg->msg_ubuf) { uarg = msg->msg_ubuf; net_zcopy_get(uarg); zc = sk->sk_route_caps & NETIF_F_SG; } else if (sock_flag(sk, SOCK_ZEROCOPY)) { + skb = tcp_write_queue_tail(sk); uarg = msg_zerocopy_realloc(sk, size, skb_zcopy(skb)); if (!uarg) { err = -ENOBUFS; -- 2.40.0 ^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [PATCH net-next 1/2] net/tcp: don't peek at tail for io_uring zc 2023-05-15 16:06 ` [PATCH net-next 1/2] net/tcp: don't peek at tail for io_uring zc Pavel Begunkov @ 2023-05-15 17:27 ` David Ahern 2023-05-15 18:11 ` Eric Dumazet 0 siblings, 1 reply; 12+ messages in thread From: David Ahern @ 2023-05-15 17:27 UTC (permalink / raw) To: Pavel Begunkov, io-uring, netdev, edumazet, davem, kuba, pabeni On 5/15/23 10:06 AM, Pavel Begunkov wrote: > Move tcp_write_queue_tail() to SOCK_ZEROCOPY specific flag as zerocopy > setup for msghdr->ubuf_info doesn't need to peek into the last request. > > Signed-off-by: Pavel Begunkov <[email protected]> > --- > net/ipv4/tcp.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > Reviewed-by: David Ahern <[email protected]> ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH net-next 1/2] net/tcp: don't peek at tail for io_uring zc 2023-05-15 17:27 ` David Ahern @ 2023-05-15 18:11 ` Eric Dumazet 0 siblings, 0 replies; 12+ messages in thread From: Eric Dumazet @ 2023-05-15 18:11 UTC (permalink / raw) To: David Ahern; +Cc: Pavel Begunkov, io-uring, netdev, davem, kuba, pabeni On Mon, May 15, 2023 at 7:27 PM David Ahern <[email protected]> wrote: > > On 5/15/23 10:06 AM, Pavel Begunkov wrote: > > Move tcp_write_queue_tail() to SOCK_ZEROCOPY specific flag as zerocopy > > setup for msghdr->ubuf_info doesn't need to peek into the last request. > > > > Signed-off-by: Pavel Begunkov <[email protected]> > > --- > > net/ipv4/tcp.c | 3 +-- > > 1 file changed, 1 insertion(+), 2 deletions(-) > > > > Reviewed-by: David Ahern <[email protected]> Reviewed-by: Eric Dumazet <[email protected]> ^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH net-next 2/2] net/tcp: optimise io_uring zc ubuf refcounting 2023-05-15 16:06 [PATCH net-next 0/2] minor tcp io_uring zc optimisations Pavel Begunkov 2023-05-15 16:06 ` [PATCH net-next 1/2] net/tcp: don't peek at tail for io_uring zc Pavel Begunkov @ 2023-05-15 16:06 ` Pavel Begunkov 2023-05-15 17:29 ` David Ahern 2023-05-17 7:40 ` [PATCH net-next 0/2] minor tcp io_uring zc optimisations patchwork-bot+netdevbpf 2 siblings, 1 reply; 12+ messages in thread From: Pavel Begunkov @ 2023-05-15 16:06 UTC (permalink / raw) To: io-uring, netdev, edumazet, davem, dsahern, kuba, pabeni; +Cc: Pavel Begunkov io_uring keeps a reference to ubuf_info during submission, so if tcp_sendmsg_locked() sees msghdr::msg_ubuf in can be sure the buffer will be kept alive and doesn't need to additionally pin it. Signed-off-by: Pavel Begunkov <[email protected]> --- net/ipv4/tcp.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 40f591f7fce1..3d18e295bb2f 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -1231,7 +1231,6 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) if ((flags & MSG_ZEROCOPY) && size) { if (msg->msg_ubuf) { uarg = msg->msg_ubuf; - net_zcopy_get(uarg); zc = sk->sk_route_caps & NETIF_F_SG; } else if (sock_flag(sk, SOCK_ZEROCOPY)) { skb = tcp_write_queue_tail(sk); @@ -1458,7 +1457,9 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) tcp_push(sk, flags, mss_now, tp->nonagle, size_goal); } out_nopush: - net_zcopy_put(uarg); + /* msg->msg_ubuf is pinned by the caller so we don't take extra refs */ + if (uarg && !msg->msg_ubuf) + net_zcopy_put(uarg); return copied + copied_syn; do_error: @@ -1467,7 +1468,9 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) if (copied + copied_syn) goto out; out_err: - net_zcopy_put_abort(uarg, true); + /* msg->msg_ubuf is pinned by the caller so we don't take extra refs */ + if (uarg && !msg->msg_ubuf) + net_zcopy_put_abort(uarg, true); err = sk_stream_error(sk, flags, err); /* make sure we wake any epoll edge trigger waiter */ if (unlikely(tcp_rtx_and_write_queues_empty(sk) && err == -EAGAIN)) { -- 2.40.0 ^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [PATCH net-next 2/2] net/tcp: optimise io_uring zc ubuf refcounting 2023-05-15 16:06 ` [PATCH net-next 2/2] net/tcp: optimise io_uring zc ubuf refcounting Pavel Begunkov @ 2023-05-15 17:29 ` David Ahern 2023-05-15 18:14 ` Eric Dumazet 0 siblings, 1 reply; 12+ messages in thread From: David Ahern @ 2023-05-15 17:29 UTC (permalink / raw) To: Pavel Begunkov, io-uring, netdev, edumazet, davem, kuba, pabeni On 5/15/23 10:06 AM, Pavel Begunkov wrote: > diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c > index 40f591f7fce1..3d18e295bb2f 100644 > --- a/net/ipv4/tcp.c > +++ b/net/ipv4/tcp.c > @@ -1231,7 +1231,6 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) > if ((flags & MSG_ZEROCOPY) && size) { > if (msg->msg_ubuf) { > uarg = msg->msg_ubuf; > - net_zcopy_get(uarg); > zc = sk->sk_route_caps & NETIF_F_SG; > } else if (sock_flag(sk, SOCK_ZEROCOPY)) { > skb = tcp_write_queue_tail(sk); > @@ -1458,7 +1457,9 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) > tcp_push(sk, flags, mss_now, tp->nonagle, size_goal); > } > out_nopush: > - net_zcopy_put(uarg); > + /* msg->msg_ubuf is pinned by the caller so we don't take extra refs */ > + if (uarg && !msg->msg_ubuf) > + net_zcopy_put(uarg); > return copied + copied_syn; > > do_error: > @@ -1467,7 +1468,9 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) > if (copied + copied_syn) > goto out; > out_err: > - net_zcopy_put_abort(uarg, true); > + /* msg->msg_ubuf is pinned by the caller so we don't take extra refs */ > + if (uarg && !msg->msg_ubuf) > + net_zcopy_put_abort(uarg, true); > err = sk_stream_error(sk, flags, err); > /* make sure we wake any epoll edge trigger waiter */ > if (unlikely(tcp_rtx_and_write_queues_empty(sk) && err == -EAGAIN)) { Both net_zcopy_put_abort and net_zcopy_put have an `if (uarg)` check. ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH net-next 2/2] net/tcp: optimise io_uring zc ubuf refcounting 2023-05-15 17:29 ` David Ahern @ 2023-05-15 18:14 ` Eric Dumazet 2023-05-15 18:40 ` David Ahern 0 siblings, 1 reply; 12+ messages in thread From: Eric Dumazet @ 2023-05-15 18:14 UTC (permalink / raw) To: David Ahern; +Cc: Pavel Begunkov, io-uring, netdev, davem, kuba, pabeni On Mon, May 15, 2023 at 7:29 PM David Ahern <[email protected]> wrote: > > On 5/15/23 10:06 AM, Pavel Begunkov wrote: > > diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c > > index 40f591f7fce1..3d18e295bb2f 100644 > > --- a/net/ipv4/tcp.c > > +++ b/net/ipv4/tcp.c > > @@ -1231,7 +1231,6 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) > > if ((flags & MSG_ZEROCOPY) && size) { > > if (msg->msg_ubuf) { > > uarg = msg->msg_ubuf; > > - net_zcopy_get(uarg); > > zc = sk->sk_route_caps & NETIF_F_SG; > > } else if (sock_flag(sk, SOCK_ZEROCOPY)) { > > skb = tcp_write_queue_tail(sk); > > @@ -1458,7 +1457,9 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) > > tcp_push(sk, flags, mss_now, tp->nonagle, size_goal); > > } > > out_nopush: > > - net_zcopy_put(uarg); > > + /* msg->msg_ubuf is pinned by the caller so we don't take extra refs */ > > + if (uarg && !msg->msg_ubuf) > > + net_zcopy_put(uarg); > > return copied + copied_syn; > > > > do_error: > > @@ -1467,7 +1468,9 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) > > if (copied + copied_syn) > > goto out; > > out_err: > > - net_zcopy_put_abort(uarg, true); > > + /* msg->msg_ubuf is pinned by the caller so we don't take extra refs */ > > + if (uarg && !msg->msg_ubuf) > > + net_zcopy_put_abort(uarg, true); > > err = sk_stream_error(sk, flags, err); > > /* make sure we wake any epoll edge trigger waiter */ > > if (unlikely(tcp_rtx_and_write_queues_empty(sk) && err == -EAGAIN)) { > > Both net_zcopy_put_abort and net_zcopy_put have an `if (uarg)` check. Right, but here this might avoid a read of msg->msg_ubuf, which might be more expensive to fetch. Compiler will probably remove the second test (uarg) from net_zcopy_put() Reviewed-by: Eric Dumazet <[email protected]> ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH net-next 2/2] net/tcp: optimise io_uring zc ubuf refcounting 2023-05-15 18:14 ` Eric Dumazet @ 2023-05-15 18:40 ` David Ahern 2023-05-16 12:59 ` Pavel Begunkov 0 siblings, 1 reply; 12+ messages in thread From: David Ahern @ 2023-05-15 18:40 UTC (permalink / raw) To: Eric Dumazet; +Cc: Pavel Begunkov, io-uring, netdev, davem, kuba, pabeni On 5/15/23 12:14 PM, Eric Dumazet wrote: > On Mon, May 15, 2023 at 7:29 PM David Ahern <[email protected]> wrote: >> >> On 5/15/23 10:06 AM, Pavel Begunkov wrote: >>> diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c >>> index 40f591f7fce1..3d18e295bb2f 100644 >>> --- a/net/ipv4/tcp.c >>> +++ b/net/ipv4/tcp.c >>> @@ -1231,7 +1231,6 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) >>> if ((flags & MSG_ZEROCOPY) && size) { >>> if (msg->msg_ubuf) { >>> uarg = msg->msg_ubuf; >>> - net_zcopy_get(uarg); >>> zc = sk->sk_route_caps & NETIF_F_SG; >>> } else if (sock_flag(sk, SOCK_ZEROCOPY)) { >>> skb = tcp_write_queue_tail(sk); >>> @@ -1458,7 +1457,9 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) >>> tcp_push(sk, flags, mss_now, tp->nonagle, size_goal); >>> } >>> out_nopush: >>> - net_zcopy_put(uarg); >>> + /* msg->msg_ubuf is pinned by the caller so we don't take extra refs */ >>> + if (uarg && !msg->msg_ubuf) >>> + net_zcopy_put(uarg); >>> return copied + copied_syn; >>> >>> do_error: >>> @@ -1467,7 +1468,9 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) >>> if (copied + copied_syn) >>> goto out; >>> out_err: >>> - net_zcopy_put_abort(uarg, true); >>> + /* msg->msg_ubuf is pinned by the caller so we don't take extra refs */ >>> + if (uarg && !msg->msg_ubuf) >>> + net_zcopy_put_abort(uarg, true); >>> err = sk_stream_error(sk, flags, err); >>> /* make sure we wake any epoll edge trigger waiter */ >>> if (unlikely(tcp_rtx_and_write_queues_empty(sk) && err == -EAGAIN)) { >> >> Both net_zcopy_put_abort and net_zcopy_put have an `if (uarg)` check. > > Right, but here this might avoid a read of msg->msg_ubuf, which might > be more expensive to fetch. agreed. > > Compiler will probably remove the second test (uarg) from net_zcopy_put() > > Reviewed-by: Eric Dumazet <[email protected]> The one in net_zcopy_put can be removed with the above change. It's other caller is net_zcopy_put_abort which has already checked uarg is set. ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH net-next 2/2] net/tcp: optimise io_uring zc ubuf refcounting 2023-05-15 18:40 ` David Ahern @ 2023-05-16 12:59 ` Pavel Begunkov 2023-05-16 14:37 ` David Ahern 0 siblings, 1 reply; 12+ messages in thread From: Pavel Begunkov @ 2023-05-16 12:59 UTC (permalink / raw) To: David Ahern, Eric Dumazet; +Cc: io-uring, netdev, davem, kuba, pabeni On 5/15/23 19:40, David Ahern wrote: > On 5/15/23 12:14 PM, Eric Dumazet wrote: >> On Mon, May 15, 2023 at 7:29 PM David Ahern <[email protected]> wrote: >>> >>> On 5/15/23 10:06 AM, Pavel Begunkov wrote: >>>> diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c >>>> index 40f591f7fce1..3d18e295bb2f 100644 >>>> --- a/net/ipv4/tcp.c >>>> +++ b/net/ipv4/tcp.c >>>> @@ -1231,7 +1231,6 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) >>>> if ((flags & MSG_ZEROCOPY) && size) { >>>> if (msg->msg_ubuf) { >>>> uarg = msg->msg_ubuf; >>>> - net_zcopy_get(uarg); >>>> zc = sk->sk_route_caps & NETIF_F_SG; >>>> } else if (sock_flag(sk, SOCK_ZEROCOPY)) { >>>> skb = tcp_write_queue_tail(sk); >>>> @@ -1458,7 +1457,9 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) >>>> tcp_push(sk, flags, mss_now, tp->nonagle, size_goal); >>>> } >>>> out_nopush: >>>> - net_zcopy_put(uarg); >>>> + /* msg->msg_ubuf is pinned by the caller so we don't take extra refs */ >>>> + if (uarg && !msg->msg_ubuf) >>>> + net_zcopy_put(uarg); >>>> return copied + copied_syn; >>>> >>>> do_error: >>>> @@ -1467,7 +1468,9 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size) >>>> if (copied + copied_syn) >>>> goto out; >>>> out_err: >>>> - net_zcopy_put_abort(uarg, true); >>>> + /* msg->msg_ubuf is pinned by the caller so we don't take extra refs */ >>>> + if (uarg && !msg->msg_ubuf) >>>> + net_zcopy_put_abort(uarg, true); >>>> err = sk_stream_error(sk, flags, err); >>>> /* make sure we wake any epoll edge trigger waiter */ >>>> if (unlikely(tcp_rtx_and_write_queues_empty(sk) && err == -EAGAIN)) { >>> >>> Both net_zcopy_put_abort and net_zcopy_put have an `if (uarg)` check. >> >> Right, but here this might avoid a read of msg->msg_ubuf, which might >> be more expensive to fetch. > > agreed. I put it there to avoid one extra check in the non-zerocopy path. msg->msg_ubuf is null there, the conditional will pass and it'll still have to test uarg. >> Compiler will probably remove the second test (uarg) from net_zcopy_put() >> >> Reviewed-by: Eric Dumazet <[email protected]> Thank you for reviews! > The one in net_zcopy_put can be removed with the above change. It's > other caller is net_zcopy_put_abort which has already checked uarg is set. Ah yes, do you want me to fold it in? -- Pavel Begunkov ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH net-next 2/2] net/tcp: optimise io_uring zc ubuf refcounting 2023-05-16 12:59 ` Pavel Begunkov @ 2023-05-16 14:37 ` David Ahern 2023-05-16 17:46 ` Pavel Begunkov 0 siblings, 1 reply; 12+ messages in thread From: David Ahern @ 2023-05-16 14:37 UTC (permalink / raw) To: Pavel Begunkov, Eric Dumazet; +Cc: io-uring, netdev, davem, kuba, pabeni On 5/16/23 6:59 AM, Pavel Begunkov wrote: > > >> The one in net_zcopy_put can be removed with the above change. It's >> other caller is net_zcopy_put_abort which has already checked uarg is >> set. > > Ah yes, do you want me to fold it in? > no preference. ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH net-next 2/2] net/tcp: optimise io_uring zc ubuf refcounting 2023-05-16 14:37 ` David Ahern @ 2023-05-16 17:46 ` Pavel Begunkov 0 siblings, 0 replies; 12+ messages in thread From: Pavel Begunkov @ 2023-05-16 17:46 UTC (permalink / raw) To: David Ahern, Eric Dumazet; +Cc: io-uring, netdev, davem, kuba, pabeni On 5/16/23 15:37, David Ahern wrote: > On 5/16/23 6:59 AM, Pavel Begunkov wrote: >> >> >>> The one in net_zcopy_put can be removed with the above change. It's >>> other caller is net_zcopy_put_abort which has already checked uarg is >>> set. >> >> Ah yes, do you want me to fold it in? >> > > no preference. I'll leave it for another patch then. It might be interesting to try remove null checks for all *_zcopy_* helpers, but it didn't feel right last time I tried. -- Pavel Begunkov ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH net-next 0/2] minor tcp io_uring zc optimisations 2023-05-15 16:06 [PATCH net-next 0/2] minor tcp io_uring zc optimisations Pavel Begunkov 2023-05-15 16:06 ` [PATCH net-next 1/2] net/tcp: don't peek at tail for io_uring zc Pavel Begunkov 2023-05-15 16:06 ` [PATCH net-next 2/2] net/tcp: optimise io_uring zc ubuf refcounting Pavel Begunkov @ 2023-05-17 7:40 ` patchwork-bot+netdevbpf 2 siblings, 0 replies; 12+ messages in thread From: patchwork-bot+netdevbpf @ 2023-05-17 7:40 UTC (permalink / raw) To: Pavel Begunkov; +Cc: io-uring, netdev, edumazet, davem, dsahern, kuba, pabeni Hello: This series was applied to netdev/net-next.git (main) by David S. Miller <[email protected]>: On Mon, 15 May 2023 17:06:35 +0100 you wrote: > Patch 1 is a simple cleanup, patch 2 gives removes 2 atomics from the > io_uring zc TCP submission path, which yielded extra 0.5% for my > throughput CPU bound tests based on liburing/examples/send-zerocopy.c > > Pavel Begunkov (2): > net/tcp: don't peek at tail for io_uring zc > net/tcp: optimise io_uring zc ubuf refcounting > > [...] Here is the summary with links: - [net-next,1/2] net/tcp: don't peek at tail for io_uring zc https://git.kernel.org/netdev/net-next/c/eea96a3e2c90 - [net-next,2/2] net/tcp: optimise io_uring zc ubuf refcounting https://git.kernel.org/netdev/net-next/c/a7533584728d You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html ^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2023-05-17 7:40 UTC | newest] Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2023-05-15 16:06 [PATCH net-next 0/2] minor tcp io_uring zc optimisations Pavel Begunkov 2023-05-15 16:06 ` [PATCH net-next 1/2] net/tcp: don't peek at tail for io_uring zc Pavel Begunkov 2023-05-15 17:27 ` David Ahern 2023-05-15 18:11 ` Eric Dumazet 2023-05-15 16:06 ` [PATCH net-next 2/2] net/tcp: optimise io_uring zc ubuf refcounting Pavel Begunkov 2023-05-15 17:29 ` David Ahern 2023-05-15 18:14 ` Eric Dumazet 2023-05-15 18:40 ` David Ahern 2023-05-16 12:59 ` Pavel Begunkov 2023-05-16 14:37 ` David Ahern 2023-05-16 17:46 ` Pavel Begunkov 2023-05-17 7:40 ` [PATCH net-next 0/2] minor tcp io_uring zc optimisations patchwork-bot+netdevbpf
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