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I just want to inform you
by Godwin Pete 08 Sep '21

08 Sep '21

Hi, I just want to use this little opportunity to inform you about my success towards the transfer. I'm currently out of the country for an investment with part of my share, after completing the transfer with an Indian business man. But i will visit your country, next year. After the completion of my project. Please, contact my secretary to send you the (ATM) card which I've already credited with the sum of ($500,000.00). Just contact her to help you in receiving the (ATM) card. I've explained everything to her before my trip. This is what I can do for you because, you couldn't help in the transfer, but for the fact that you're the person whom I've contacted initially, for the transfer. I decided to give this ($500,000.00) as a compensation for being contacted initially for the transfer. I always try to make the difference, in dealing with people any time I come in contact with them. I'm also trying to show that I'm quite a different person from others whose may have a different purpose within them. I believe that you will render some help to me when I, will visit your country, for another investment there. So contact my secretary for the card, Her contact are as follows, Full name: Mrs, Jovita Dumuije, Country: Burkina Faso Email: jovitadumuije(a)gmail.com Thanks, and hope for a good corporation with you in future. Godwin Peter,

1 0

[PATCH net] net: hns3: add option to turn off page pool feature
by Yunsheng Lin 06 Sep '21

06 Sep '21

When page pool is added to the hns3 driver, it is always enabled unconditionally, which means spilt page handling in the hns3 driver is dead code. As there is a requirement to test the performance between spilt page handling in driver and page pool, so add a module param to support disabling the page pool. When the page pool is proved to be perform better in most case, the spilt page handling in driver can be removed. Fixes: 93188e9642c3 ("net: hns3: support skb's frag page recycling based on page pool") Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> --- drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index 22af3d6ce178..293243bbe407 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -61,6 +61,9 @@ static unsigned int tx_sgl = 1; module_param(tx_sgl, uint, 0600); MODULE_PARM_DESC(tx_sgl, "Minimum number of frags when using dma_map_sg() to optimize the IOMMU mapping"); +static bool page_pool_enabled = true; +module_param(page_pool_enabled, bool, 0400); + #define HNS3_SGL_SIZE(nfrag) (sizeof(struct scatterlist) * (nfrag) + \ sizeof(struct sg_table)) #define HNS3_MAX_SGL_SIZE ALIGN(HNS3_SGL_SIZE(HNS3_MAX_TSO_BD_NUM), \ @@ -4753,7 +4756,8 @@ static int hns3_alloc_ring_memory(struct hns3_enet_ring *ring) goto out_with_desc_cb; if (!HNAE3_IS_TX_RING(ring)) { - hns3_alloc_page_pool(ring); + if (page_pool_enabled) + hns3_alloc_page_pool(ring); ret = hns3_alloc_ring_buffers(ring); if (ret) -- 2.33.0

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[PATCH net-next] tcp: add tcp_tx_skb_cache_key checking in sk_stream_alloc_skb()
by Yunsheng Lin 02 Sep '21

02 Sep '21

Since tcp_tx_skb_cache is disabled by default in: commit 0b7d7f6b2208 ("tcp: add tcp_tx_skb_cache sysctl") Add tcp_tx_skb_cache_key checking in sk_stream_alloc_skb() to avoid possible branch-misses. Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> --- Also, the sk->sk_tx_skb_cache may be both changed by allocation and freeing side, I assume there may be some implicit protection here too, such as the NAPI protection for rx? --- net/ipv4/tcp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index e8b48df..226ddef 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -866,7 +866,7 @@ struct sk_buff *sk_stream_alloc_skb(struct sock *sk, int size, gfp_t gfp, { struct sk_buff *skb; - if (likely(!size)) { + if (static_branch_unlikely(&tcp_tx_skb_cache_key) && likely(!size)) { skb = sk->sk_tx_skb_cache; if (skb) { skb->truesize = SKB_TRUESIZE(skb_end_offset(skb)); -- 2.7.4

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[PATCH net-next 0/2] some optimization for page pool
by Yunsheng Lin 01 Sep '21

01 Sep '21

Patch 1: support non-split page when PP_FLAG_PAGE_FRAG is set. Patch 1: keep track of pp page when __skb_frag_ref() is called. Yunshene Lin (2): page_pool: support non-split page with PP_FLAG_PAGE_FRAG skbuff: keep track of pp page when __skb_frag_ref() is called include/linux/skbuff.h | 13 ++++++++++++- include/net/page_pool.h | 23 +++++++++++++++++++++++ net/core/page_pool.c | 24 +++++++++--------------- 3 files changed, 44 insertions(+), 16 deletions(-) -- 2.7.4

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For your information
by Godwin Pete 30 Aug '21

30 Aug '21

Hi, I just want to use this little opportunity to inform you about my success towards the transfer. I'm currently out of the country for an investment with part of my share, after completing the transfer with an Indian business man. But i will visit your country, next year. After the completion of my project. Please, contact my secretary to send you the (ATM) card which I've already credited with the sum of ($500,000.00). Just contact her to help you in receiving the (ATM) card. I've explained everything to her before my trip. This is what I can do for you because, you couldn't help in the transfer, but for the fact that you're the person whom I've contacted initially, for the transfer. I decided to give this ($500,000.00) as a compensation for being contacted initially for the transfer. I always try to make the difference, in dealing with people any time I come in contact with them. I'm also trying to show that I'm quite a different person from others whose may have a different purpose within them. I believe that you will render some help to me when I, will visit your country, for another investment there. So contact my secretary for the card, Her contact are as follows, Full name: Mrs, Jovita Dumuije, Country: Burkina Faso Email: jovitadumuije(a)gmail.com Thanks, and hope for a good corporation with you in future. Godwin Peter,

1 0

[PATCH RESEND ethtool-next] netlink: settings: add netlink support for coalesce cqe mode parameter
by Yufeng Mo 30 Aug '21

30 Aug '21

Add support for "ethtool -c <dev> cqe-mode-rx/cqe-mode-tx on/off" for setting coalesce cqe mode. Signed-off-by: Yufeng Mo <moyufeng(a)huawei.com> --- ethtool.c | 2 ++ netlink/coalesce.c | 15 +++++++++++++++ 2 files changed, 17 insertions(+) diff --git a/ethtool.c b/ethtool.c index 2486caa..a6826e9 100644 --- a/ethtool.c +++ b/ethtool.c @@ -5703,6 +5703,8 @@ static const struct option args[] = { " [tx-usecs-high N]\n" " [tx-frames-high N]\n" " [sample-interval N]\n" + " [cqe-mode-rx on|off]\n" + " [cqe-mode-tx on|off]\n" }, { .opts = "-g|--show-ring", diff --git a/netlink/coalesce.c b/netlink/coalesce.c index 75922a9..762d0e3 100644 --- a/netlink/coalesce.c +++ b/netlink/coalesce.c @@ -66,6 +66,9 @@ int coalesce_reply_cb(const struct nlmsghdr *nlhdr, void *data) show_u32(tb[ETHTOOL_A_COALESCE_TX_USECS_HIGH], "tx-usecs-high: "); show_u32(tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH], "tx-frame-high: "); putchar('\n'); + show_bool("rx", "CQE mode RX: %s ", + tb[ETHTOOL_A_COALESCE_USE_CQE_MODE_RX]); + show_bool("tx", "TX: %s\n", tb[ETHTOOL_A_COALESCE_USE_CQE_MODE_TX]); return MNL_CB_OK; } @@ -226,6 +229,18 @@ static const struct param_parser scoalesce_params[] = { .handler = nl_parse_direct_u32, .min_argc = 1, }, + { + .arg = "cqe-mode-rx", + .type = ETHTOOL_A_COALESCE_USE_CQE_MODE_RX, + .handler = nl_parse_u8bool, + .min_argc = 1, + }, + { + .arg = "cqe-mode-tx", + .type = ETHTOOL_A_COALESCE_USE_CQE_MODE_TX, + .handler = nl_parse_u8bool, + .min_argc = 1, + }, {} }; -- 2.8.1

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[PATCH kernel] netlink: settings: add netlink support for coalesce cqe mode parameter
by Yufeng Mo 27 Aug '21

27 Aug '21

Add support for "ethtool -c <dev> cqe-mode-rx/cqe-mode-tx on/off" for setting coalesce cqe mode. Signed-off-by: Yufeng Mo <moyufeng(a)huawei.com> --- ethtool.c | 2 ++ netlink/coalesce.c | 15 +++++++++++++++ 2 files changed, 17 insertions(+) diff --git a/ethtool.c b/ethtool.c index 2486caa..a6826e9 100644 --- a/ethtool.c +++ b/ethtool.c @@ -5703,6 +5703,8 @@ static const struct option args[] = { " [tx-usecs-high N]\n" " [tx-frames-high N]\n" " [sample-interval N]\n" + " [cqe-mode-rx on|off]\n" + " [cqe-mode-tx on|off]\n" }, { .opts = "-g|--show-ring", diff --git a/netlink/coalesce.c b/netlink/coalesce.c index 75922a9..762d0e3 100644 --- a/netlink/coalesce.c +++ b/netlink/coalesce.c @@ -66,6 +66,9 @@ int coalesce_reply_cb(const struct nlmsghdr *nlhdr, void *data) show_u32(tb[ETHTOOL_A_COALESCE_TX_USECS_HIGH], "tx-usecs-high: "); show_u32(tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH], "tx-frame-high: "); putchar('\n'); + show_bool("rx", "CQE mode RX: %s ", + tb[ETHTOOL_A_COALESCE_USE_CQE_MODE_RX]); + show_bool("tx", "TX: %s\n", tb[ETHTOOL_A_COALESCE_USE_CQE_MODE_TX]); return MNL_CB_OK; } @@ -226,6 +229,18 @@ static const struct param_parser scoalesce_params[] = { .handler = nl_parse_direct_u32, .min_argc = 1, }, + { + .arg = "cqe-mode-rx", + .type = ETHTOOL_A_COALESCE_USE_CQE_MODE_RX, + .handler = nl_parse_u8bool, + .min_argc = 1, + }, + { + .arg = "cqe-mode-tx", + .type = ETHTOOL_A_COALESCE_USE_CQE_MODE_TX, + .handler = nl_parse_u8bool, + .min_argc = 1, + }, {} }; -- 2.8.1

2 1

[PATCH kernel] netlink: settings: add netlink support for coalesce cqe mode parameter
by Yufeng Mo 27 Aug '21

27 Aug '21

Add support for "ethtool -c <dev> cqe-mode-rx/cqe-mode-tx on/off" for setting coalesce cqe mode. Signed-off-by: Yufeng Mo <moyufeng(a)huawei.com> --- ethtool.c | 2 ++ netlink/coalesce.c | 15 +++++++++++++++ 2 files changed, 17 insertions(+) diff --git a/ethtool.c b/ethtool.c index 2486caa..a6826e9 100644 --- a/ethtool.c +++ b/ethtool.c @@ -5703,6 +5703,8 @@ static const struct option args[] = { " [tx-usecs-high N]\n" " [tx-frames-high N]\n" " [sample-interval N]\n" + " [cqe-mode-rx on|off]\n" + " [cqe-mode-tx on|off]\n" }, { .opts = "-g|--show-ring", diff --git a/netlink/coalesce.c b/netlink/coalesce.c index 75922a9..762d0e3 100644 --- a/netlink/coalesce.c +++ b/netlink/coalesce.c @@ -66,6 +66,9 @@ int coalesce_reply_cb(const struct nlmsghdr *nlhdr, void *data) show_u32(tb[ETHTOOL_A_COALESCE_TX_USECS_HIGH], "tx-usecs-high: "); show_u32(tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH], "tx-frame-high: "); putchar('\n'); + show_bool("rx", "CQE mode RX: %s ", + tb[ETHTOOL_A_COALESCE_USE_CQE_MODE_RX]); + show_bool("tx", "TX: %s\n", tb[ETHTOOL_A_COALESCE_USE_CQE_MODE_TX]); return MNL_CB_OK; } @@ -226,6 +229,18 @@ static const struct param_parser scoalesce_params[] = { .handler = nl_parse_direct_u32, .min_argc = 1, }, + { + .arg = "cqe-mode-rx", + .type = ETHTOOL_A_COALESCE_USE_CQE_MODE_RX, + .handler = nl_parse_u8bool, + .min_argc = 1, + }, + { + .arg = "cqe-mode-tx", + .type = ETHTOOL_A_COALESCE_USE_CQE_MODE_TX, + .handler = nl_parse_u8bool, + .min_argc = 1, + }, {} }; -- 2.8.1

1 0

[PATCH net-next] sock: remove one redundant SKB_FRAG_PAGE_ORDER macro
by Yunsheng Lin 26 Aug '21

26 Aug '21

Both SKB_FRAG_PAGE_ORDER are defined to the same value in net/core/sock.c and drivers/vhost/net.c. Move the SKB_FRAG_PAGE_ORDER definition to net/core/sock.h, as both net/core/sock.c and drivers/vhost/net.c include it, and it seems a reasonable file to put the macro. Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> --- drivers/vhost/net.c | 2 -- include/net/sock.h | 1 + net/core/sock.c | 1 - 3 files changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 6414bd5..3a249ee 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -643,8 +643,6 @@ static bool tx_can_batch(struct vhost_virtqueue *vq, size_t total_len) !vhost_vq_avail_empty(vq->dev, vq); } -#define SKB_FRAG_PAGE_ORDER get_order(32768) - static bool vhost_net_page_frag_refill(struct vhost_net *net, unsigned int sz, struct page_frag *pfrag, gfp_t gfp) { diff --git a/include/net/sock.h b/include/net/sock.h index 95b2577..66a9a90 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -2717,6 +2717,7 @@ extern int sysctl_optmem_max; extern __u32 sysctl_wmem_default; extern __u32 sysctl_rmem_default; +#define SKB_FRAG_PAGE_ORDER get_order(32768) DECLARE_STATIC_KEY_FALSE(net_high_order_alloc_disable_key); static inline int sk_get_wmem0(const struct sock *sk, const struct proto *proto) diff --git a/net/core/sock.c b/net/core/sock.c index 950f1e7..62627e8 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -2574,7 +2574,6 @@ static void sk_leave_memory_pressure(struct sock *sk) } } -#define SKB_FRAG_PAGE_ORDER get_order(32768) DEFINE_STATIC_KEY_FALSE(net_high_order_alloc_disable_key); /** -- 2.7.4

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[PATCH RFC 0/7] add socket to netdev page frag recycling support
by Yunsheng Lin 26 Aug '21

26 Aug '21

This patchset adds the socket to netdev page frag recycling support based on the busy polling and page pool infrastructure. The profermance improve from 30Gbit to 41Gbit for one thread iperf tcp flow, and the CPU usages decreases about 20% for four threads iperf flow with 100Gb line speed in IOMMU strict mode. The profermance improve about 2.5% for one thread iperf tcp flow in IOMMU passthrough mode. Yunsheng Lin (7): page_pool: refactor the page pool to support multi alloc context skbuff: add interface to manipulate frag count for tx recycling net: add NAPI api to register and retrieve the page pool ptr net: pfrag_pool: add pfrag pool support based on page pool sock: support refilling pfrag from pfrag_pool net: hns3: support tx recycling in the hns3 driver sysctl_tcp_use_pfrag_pool drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 32 +++++---- include/linux/netdevice.h | 9 +++ include/linux/skbuff.h | 43 +++++++++++- include/net/netns/ipv4.h | 1 + include/net/page_pool.h | 15 ++++ include/net/pfrag_pool.h | 24 +++++++ include/net/sock.h | 1 + net/core/Makefile | 1 + net/core/dev.c | 34 ++++++++- net/core/page_pool.c | 86 ++++++++++++----------- net/core/pfrag_pool.c | 92 +++++++++++++++++++++++++ net/core/sock.c | 12 ++++ net/ipv4/sysctl_net_ipv4.c | 7 ++ net/ipv4/tcp.c | 34 ++++++--- 14 files changed, 325 insertions(+), 66 deletions(-) create mode 100644 include/net/pfrag_pool.h create mode 100644 net/core/pfrag_pool.c -- 2.7.4

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