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Message-ID: <202311162002.m26ObVLU-lkp@intel.com>
Date: Thu, 16 Nov 2023 20:39:56 +0800
From: kernel test robot <lkp@...el.com>
To: Coco Li <lixiaoyan@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
Eric Dumazet <edumazet@...gle.com>,
Neal Cardwell <ncardwell@...gle.com>,
Mubashir Adnan Qureshi <mubashirq@...gle.com>,
Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew@...n.ch>,
Jonathan Corbet <corbet@....net>, David Ahern <dsahern@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
netdev@...r.kernel.org, Chao Wu <wwchao@...gle.com>,
Wei Wang <weiwan@...gle.com>, Pradeep Nemavat <pnemavat@...gle.com>,
Coco Li <lixiaoyan@...gle.com>
Subject: Re: [PATCH v7 net-next 4/5] net-device: reorganize net_device fast
path variables
Hi Coco,
kernel test robot noticed the following build errors:
[auto build test ERROR on net-next/main]
url: https://github.com/intel-lab-lkp/linux/commits/Coco-Li/Documentations-Analyze-heavily-used-Networking-related-structs/20231114-073648
base: net-next/main
patch link: https://lore.kernel.org/r/20231113233301.1020992-5-lixiaoyan%40google.com
patch subject: [PATCH v7 net-next 4/5] net-device: reorganize net_device fast path variables
config: powerpc-mpc8313_rdb_defconfig (https://download.01.org/0day-ci/archive/20231116/202311162002.m26ObVLU-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231116/202311162002.m26ObVLU-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311162002.m26ObVLU-lkp@intel.com/
All errors (new ones prefixed by >>):
net/core/dev.c:4079:1: warning: unused function 'sch_handle_ingress' [-Wunused-function]
4079 | sch_handle_ingress(struct sk_buff *skb, struct packet_type **pt_prev, int *ret,
| ^
net/core/dev.c:4086:1: warning: unused function 'sch_handle_egress' [-Wunused-function]
4086 | sch_handle_egress(struct sk_buff *skb, int *ret, struct net_device *dev)
| ^
net/core/dev.c:5296:19: warning: unused function 'nf_ingress' [-Wunused-function]
5296 | static inline int nf_ingress(struct sk_buff *skb, struct packet_type **pt_prev,
| ^
>> net/core/dev.c:11547:2: error: call to '__compiletime_assert_971' declared with 'error' attribute: BUILD_BUG_ON failed: offsetof(struct net_device, __cacheline_group_end__net_device_read_txrx) - offsetofend(struct net_device, __cacheline_group_begin__net_device_read_txrx) > 24
11547 | CACHELINE_ASSERT_GROUP_SIZE(struct net_device, net_device_read_txrx, 24);
| ^
include/linux/cache.h:108:2: note: expanded from macro 'CACHELINE_ASSERT_GROUP_SIZE'
108 | BUILD_BUG_ON(offsetof(TYPE, __cacheline_group_end__##GROUP) - \
| ^
include/linux/build_bug.h:50:2: note: expanded from macro 'BUILD_BUG_ON'
50 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
| ^
include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
| ^
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:423:2: note: expanded from macro '_compiletime_assert'
423 | __compiletime_assert(condition, msg, prefix, suffix)
| ^
include/linux/compiler_types.h:416:4: note: expanded from macro '__compiletime_assert'
416 | prefix ## suffix(); \
| ^
<scratch space>:11:1: note: expanded from here
11 | __compiletime_assert_971
| ^
3 warnings and 1 error generated.
vim +11547 net/core/dev.c
11515
11516 static void __init net_dev_struct_check(void)
11517 {
11518 /* TX read-mostly hotpath */
11519 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_tx, priv_flags);
11520 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_tx, netdev_ops);
11521 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_tx, header_ops);
11522 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_tx, _tx);
11523 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_tx, real_num_tx_queues);
11524 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_tx, gso_max_size);
11525 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_tx, gso_ipv4_max_size);
11526 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_tx, gso_max_segs);
11527 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_tx, num_tc);
11528 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_tx, mtu);
11529 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_tx, needed_headroom);
11530 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_tx, tc_to_txq);
11531 #ifdef CONFIG_XPS
11532 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_tx, xps_maps);
11533 #endif
11534 #ifdef CONFIG_NETFILTER_EGRESS
11535 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_tx, nf_hooks_egress);
11536 #endif
11537 #ifdef CONFIG_NET_XGRESS
11538 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_tx, tcx_egress);
11539 #endif
11540 CACHELINE_ASSERT_GROUP_SIZE(struct net_device, net_device_read_tx, 152);
11541
11542 /* TXRX read-mostly hotpath */
11543 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_txrx, flags);
11544 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_txrx, hard_header_len);
11545 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_txrx, features);
11546 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_txrx, ip6_ptr);
11547 CACHELINE_ASSERT_GROUP_SIZE(struct net_device, net_device_read_txrx, 24);
11548
11549 /* RX read-mostly hotpath */
11550 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_rx, ptype_specific);
11551 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_rx, ifindex);
11552 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_rx, real_num_rx_queues);
11553 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_rx, _rx);
11554 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_rx, gro_flush_timeout);
11555 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_rx, napi_defer_hard_irqs);
11556 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_rx, gro_max_size);
11557 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_rx, gro_ipv4_max_size);
11558 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_rx, rx_handler);
11559 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_rx, rx_handler_data);
11560 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_rx, nd_net);
11561 #ifdef CONFIG_NETPOLL
11562 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_rx, npinfo);
11563 #endif
11564 #ifdef CONFIG_NET_XGRESS
11565 CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_rx, tcx_ingress);
11566 #endif
11567 CACHELINE_ASSERT_GROUP_SIZE(struct net_device, net_device_read_rx, 96);
11568 }
11569
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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