netdev - [PATCH net-next] Revert "r8169: use netif_receive_skb

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <f1cb3f3e-e44b-db2d-d4aa-07e407583902@gmail.com>
Date:   Wed, 3 Apr 2019 19:54:12 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     David Miller <davem@...emloft.net>,
        Realtek linux nic maintainers <nic_swsd@...ltek.com>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH net-next] Revert "r8169: use netif_receive_skb_list batching"

This reverts commit 6578229d4efb7ea6287861bfc2bd306140458e07.
netif_receive_skb_list() doesn't support GRO, therefore we may have
scenarios with decreased performance. See discussion here [0].

[0] https://marc.info/?t=155403847400001&r=1&w=2

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 drivers/net/ethernet/realtek/r8169.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 8a8a4f70db1e..88eb9e05d2a1 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -6426,7 +6426,6 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp, u32 budget
 {
 	unsigned int cur_rx, rx_left;
 	unsigned int count;
-	LIST_HEAD(rx_list);
 
 	cur_rx = tp->cur_rx;
 
@@ -6502,7 +6501,7 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp, u32 budget
 			if (skb->pkt_type == PACKET_MULTICAST)
 				dev->stats.multicast++;
 
-			list_add_tail(&skb->list, &rx_list);
+			napi_gro_receive(&tp->napi, skb);
 
 			u64_stats_update_begin(&tp->rx_stats.syncp);
 			tp->rx_stats.packets++;
@@ -6517,8 +6516,6 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp, u32 budget
 	count = cur_rx - tp->cur_rx;
 	tp->cur_rx = cur_rx;
 
-	netif_receive_skb_list(&rx_list);
-
 	return count;
 }
 
-- 
2.21.0