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Date: Sun, 18 Dec 2022 11:33:57 +0800
From: kernel test robot <lkp@...el.com>
To: Yevgeny Kliteynik <kliteyn@...dia.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-kernel@...r.kernel.org, Saeed Mahameed <saeedm@...dia.com>,
Alex Vesker <valex@...dia.com>
Subject: drivers/net/ethernet/mellanox/mlx5/core/steering/dr_rule.c:1087:1:
warning: stack frame size (1072) exceeds limit (1024) in
'dr_rule_create_rule_nic'
Hi Yevgeny,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: f9ff5644bcc04221bae56f922122f2b7f5d24d62
commit: b9b81e1e93820eb47aeaf0fe7cdda535adf8e7a4 net/mlx5: DR, For short chains of STEs, avoid allocating ste_arr dynamically
date: 7 weeks ago
config: powerpc-allyesconfig
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 98b13979fb05f3ed288a900deb843e7b27589e58)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install powerpc cross compiling tool for clang build
# apt-get install binutils-powerpc-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b9b81e1e93820eb47aeaf0fe7cdda535adf8e7a4
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout b9b81e1e93820eb47aeaf0fe7cdda535adf8e7a4
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/net/ethernet/mellanox/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
>> drivers/net/ethernet/mellanox/mlx5/core/steering/dr_rule.c:1087:1: warning: stack frame size (1072) exceeds limit (1024) in 'dr_rule_create_rule_nic' [-Wframe-larger-than]
dr_rule_create_rule_nic(struct mlx5dr_rule *rule,
^
235/1072 (21.92%) spills, 837/1072 (78.08%) variables
1 warning generated.
vim +/dr_rule_create_rule_nic +1087 drivers/net/ethernet/mellanox/mlx5/core/steering/dr_rule.c
41d07074154c67 Alex Vesker 2019-08-19 1085
41d07074154c67 Alex Vesker 2019-08-19 1086 static int
41d07074154c67 Alex Vesker 2019-08-19 @1087 dr_rule_create_rule_nic(struct mlx5dr_rule *rule,
41d07074154c67 Alex Vesker 2019-08-19 1088 struct mlx5dr_rule_rx_tx *nic_rule,
41d07074154c67 Alex Vesker 2019-08-19 1089 struct mlx5dr_match_param *param,
41d07074154c67 Alex Vesker 2019-08-19 1090 size_t num_actions,
41d07074154c67 Alex Vesker 2019-08-19 1091 struct mlx5dr_action *actions[])
41d07074154c67 Alex Vesker 2019-08-19 1092 {
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1093 u8 hw_ste_arr_optimized[DR_RULE_MAX_STE_CHAIN_OPTIMIZED * DR_STE_SIZE] = {};
41d07074154c67 Alex Vesker 2019-08-19 1094 struct mlx5dr_ste_send_info *ste_info, *tmp_ste_info;
41d07074154c67 Alex Vesker 2019-08-19 1095 struct mlx5dr_matcher *matcher = rule->matcher;
41d07074154c67 Alex Vesker 2019-08-19 1096 struct mlx5dr_domain *dmn = matcher->tbl->dmn;
41d07074154c67 Alex Vesker 2019-08-19 1097 struct mlx5dr_matcher_rx_tx *nic_matcher;
41d07074154c67 Alex Vesker 2019-08-19 1098 struct mlx5dr_domain_rx_tx *nic_dmn;
41d07074154c67 Alex Vesker 2019-08-19 1099 struct mlx5dr_ste_htbl *htbl = NULL;
41d07074154c67 Alex Vesker 2019-08-19 1100 struct mlx5dr_ste_htbl *cur_htbl;
41d07074154c67 Alex Vesker 2019-08-19 1101 struct mlx5dr_ste *ste = NULL;
41d07074154c67 Alex Vesker 2019-08-19 1102 LIST_HEAD(send_ste_list);
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1103 bool hw_ste_arr_is_opt;
41d07074154c67 Alex Vesker 2019-08-19 1104 u8 *hw_ste_arr = NULL;
41d07074154c67 Alex Vesker 2019-08-19 1105 u32 new_hw_ste_arr_sz;
41d07074154c67 Alex Vesker 2019-08-19 1106 int ret, i;
41d07074154c67 Alex Vesker 2019-08-19 1107
41d07074154c67 Alex Vesker 2019-08-19 1108 nic_matcher = nic_rule->nic_matcher;
41d07074154c67 Alex Vesker 2019-08-19 1109 nic_dmn = nic_matcher->nic_tbl->nic_dmn;
41d07074154c67 Alex Vesker 2019-08-19 1110
46f2a8ae8a7008 Yevgeny Kliteynik 2021-07-04 1111 if (dr_rule_skip(dmn->type, nic_dmn->type, &matcher->mask, param,
01723919675dfa Hamdan Igbaria 2020-06-15 1112 rule->flow_source))
41d07074154c67 Alex Vesker 2019-08-19 1113 return 0;
41d07074154c67 Alex Vesker 2019-08-19 1114
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1115 ret = mlx5dr_matcher_select_builders(matcher,
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1116 nic_matcher,
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1117 dr_rule_get_ipv(¶m->outer),
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1118 dr_rule_get_ipv(¶m->inner));
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1119 if (ret)
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1120 return ret;
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1121
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1122 hw_ste_arr_is_opt = nic_matcher->num_of_builders <= DR_RULE_MAX_STES_OPTIMIZED;
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1123 if (likely(hw_ste_arr_is_opt)) {
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1124 hw_ste_arr = hw_ste_arr_optimized;
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1125 } else {
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1126 hw_ste_arr = kzalloc((nic_matcher->num_of_builders + DR_ACTION_MAX_STES) *
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1127 DR_STE_SIZE, GFP_KERNEL);
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1128
ed03a418abe8e5 Alex Vesker 2020-05-20 1129 if (!hw_ste_arr)
ed03a418abe8e5 Alex Vesker 2020-05-20 1130 return -ENOMEM;
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1131 }
ed03a418abe8e5 Alex Vesker 2020-05-20 1132
ed03a418abe8e5 Alex Vesker 2020-05-20 1133 mlx5dr_domain_nic_lock(nic_dmn);
ed03a418abe8e5 Alex Vesker 2020-05-20 1134
cc2295cd54e483 Yevgeny Kliteynik 2021-10-14 1135 ret = mlx5dr_matcher_add_to_tbl_nic(dmn, nic_matcher);
cc2295cd54e483 Yevgeny Kliteynik 2021-10-14 1136 if (ret)
cc2295cd54e483 Yevgeny Kliteynik 2021-10-14 1137 goto free_hw_ste;
cc2295cd54e483 Yevgeny Kliteynik 2021-10-14 1138
41d07074154c67 Alex Vesker 2019-08-19 1139 /* Set the tag values inside the ste array */
41d07074154c67 Alex Vesker 2019-08-19 1140 ret = mlx5dr_ste_build_ste_arr(matcher, nic_matcher, param, hw_ste_arr);
41d07074154c67 Alex Vesker 2019-08-19 1141 if (ret)
cc2295cd54e483 Yevgeny Kliteynik 2021-10-14 1142 goto remove_from_nic_tbl;
41d07074154c67 Alex Vesker 2019-08-19 1143
41d07074154c67 Alex Vesker 2019-08-19 1144 /* Set the actions values/addresses inside the ste array */
41d07074154c67 Alex Vesker 2019-08-19 1145 ret = mlx5dr_actions_build_ste_arr(matcher, nic_matcher, actions,
41d07074154c67 Alex Vesker 2019-08-19 1146 num_actions, hw_ste_arr,
41d07074154c67 Alex Vesker 2019-08-19 1147 &new_hw_ste_arr_sz);
41d07074154c67 Alex Vesker 2019-08-19 1148 if (ret)
cc2295cd54e483 Yevgeny Kliteynik 2021-10-14 1149 goto remove_from_nic_tbl;
41d07074154c67 Alex Vesker 2019-08-19 1150
41d07074154c67 Alex Vesker 2019-08-19 1151 cur_htbl = nic_matcher->s_htbl;
41d07074154c67 Alex Vesker 2019-08-19 1152
41d07074154c67 Alex Vesker 2019-08-19 1153 /* Go over the array of STEs, and build dr_ste accordingly.
41d07074154c67 Alex Vesker 2019-08-19 1154 * The loop is over only the builders which are equal or less to the
41d07074154c67 Alex Vesker 2019-08-19 1155 * number of stes, in case we have actions that lives in other stes.
41d07074154c67 Alex Vesker 2019-08-19 1156 */
41d07074154c67 Alex Vesker 2019-08-19 1157 for (i = 0; i < nic_matcher->num_of_builders; i++) {
41d07074154c67 Alex Vesker 2019-08-19 1158 /* Calculate CRC and keep new ste entry */
41d07074154c67 Alex Vesker 2019-08-19 1159 u8 *cur_hw_ste_ent = hw_ste_arr + (i * DR_STE_SIZE);
41d07074154c67 Alex Vesker 2019-08-19 1160
41d07074154c67 Alex Vesker 2019-08-19 1161 ste = dr_rule_handle_ste_branch(rule,
41d07074154c67 Alex Vesker 2019-08-19 1162 nic_rule,
41d07074154c67 Alex Vesker 2019-08-19 1163 &send_ste_list,
41d07074154c67 Alex Vesker 2019-08-19 1164 cur_htbl,
41d07074154c67 Alex Vesker 2019-08-19 1165 cur_hw_ste_ent,
41d07074154c67 Alex Vesker 2019-08-19 1166 i + 1,
41d07074154c67 Alex Vesker 2019-08-19 1167 &htbl);
41d07074154c67 Alex Vesker 2019-08-19 1168 if (!ste) {
41d07074154c67 Alex Vesker 2019-08-19 1169 mlx5dr_err(dmn, "Failed creating next branch\n");
41d07074154c67 Alex Vesker 2019-08-19 1170 ret = -ENOENT;
41d07074154c67 Alex Vesker 2019-08-19 1171 goto free_rule;
41d07074154c67 Alex Vesker 2019-08-19 1172 }
41d07074154c67 Alex Vesker 2019-08-19 1173
41d07074154c67 Alex Vesker 2019-08-19 1174 cur_htbl = ste->next_htbl;
41d07074154c67 Alex Vesker 2019-08-19 1175
41d07074154c67 Alex Vesker 2019-08-19 1176 mlx5dr_ste_get(ste);
8a015baef50a7b Yevgeny Kliteynik 2021-07-08 1177 mlx5dr_rule_set_last_member(nic_rule, ste, true);
41d07074154c67 Alex Vesker 2019-08-19 1178 }
41d07074154c67 Alex Vesker 2019-08-19 1179
41d07074154c67 Alex Vesker 2019-08-19 1180 /* Connect actions */
41d07074154c67 Alex Vesker 2019-08-19 1181 ret = dr_rule_handle_action_stes(rule, nic_rule, &send_ste_list,
41d07074154c67 Alex Vesker 2019-08-19 1182 ste, hw_ste_arr, new_hw_ste_arr_sz);
41d07074154c67 Alex Vesker 2019-08-19 1183 if (ret) {
41d07074154c67 Alex Vesker 2019-08-19 1184 mlx5dr_dbg(dmn, "Failed apply actions\n");
41d07074154c67 Alex Vesker 2019-08-19 1185 goto free_rule;
41d07074154c67 Alex Vesker 2019-08-19 1186 }
41d07074154c67 Alex Vesker 2019-08-19 1187 ret = dr_rule_send_update_list(&send_ste_list, dmn, true);
41d07074154c67 Alex Vesker 2019-08-19 1188 if (ret) {
41d07074154c67 Alex Vesker 2019-08-19 1189 mlx5dr_err(dmn, "Failed sending ste!\n");
41d07074154c67 Alex Vesker 2019-08-19 1190 goto free_rule;
41d07074154c67 Alex Vesker 2019-08-19 1191 }
41d07074154c67 Alex Vesker 2019-08-19 1192
41d07074154c67 Alex Vesker 2019-08-19 1193 if (htbl)
41d07074154c67 Alex Vesker 2019-08-19 1194 mlx5dr_htbl_put(htbl);
41d07074154c67 Alex Vesker 2019-08-19 1195
cc2295cd54e483 Yevgeny Kliteynik 2021-10-14 1196 nic_matcher->rules++;
cc2295cd54e483 Yevgeny Kliteynik 2021-10-14 1197
ed03a418abe8e5 Alex Vesker 2020-05-20 1198 mlx5dr_domain_nic_unlock(nic_dmn);
ed03a418abe8e5 Alex Vesker 2020-05-20 1199
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1200 if (unlikely(!hw_ste_arr_is_opt))
260986fcff81a0 Alex Vesker 2019-10-29 1201 kfree(hw_ste_arr);
260986fcff81a0 Alex Vesker 2019-10-29 1202
41d07074154c67 Alex Vesker 2019-08-19 1203 return 0;
41d07074154c67 Alex Vesker 2019-08-19 1204
41d07074154c67 Alex Vesker 2019-08-19 1205 free_rule:
41d07074154c67 Alex Vesker 2019-08-19 1206 dr_rule_clean_rule_members(rule, nic_rule);
41d07074154c67 Alex Vesker 2019-08-19 1207 /* Clean all ste_info's */
41d07074154c67 Alex Vesker 2019-08-19 1208 list_for_each_entry_safe(ste_info, tmp_ste_info, &send_ste_list, send_list) {
41d07074154c67 Alex Vesker 2019-08-19 1209 list_del(&ste_info->send_list);
41d07074154c67 Alex Vesker 2019-08-19 1210 kfree(ste_info);
41d07074154c67 Alex Vesker 2019-08-19 1211 }
cc2295cd54e483 Yevgeny Kliteynik 2021-10-14 1212
cc2295cd54e483 Yevgeny Kliteynik 2021-10-14 1213 remove_from_nic_tbl:
cc2295cd54e483 Yevgeny Kliteynik 2021-10-14 1214 mlx5dr_matcher_remove_from_tbl_nic(dmn, nic_matcher);
cc2295cd54e483 Yevgeny Kliteynik 2021-10-14 1215
41d07074154c67 Alex Vesker 2019-08-19 1216 free_hw_ste:
ed03a418abe8e5 Alex Vesker 2020-05-20 1217 mlx5dr_domain_nic_unlock(nic_dmn);
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1218
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1219 if (unlikely(!hw_ste_arr_is_opt))
41d07074154c67 Alex Vesker 2019-08-19 1220 kfree(hw_ste_arr);
b9b81e1e93820e Yevgeny Kliteynik 2022-03-29 1221
41d07074154c67 Alex Vesker 2019-08-19 1222 return ret;
41d07074154c67 Alex Vesker 2019-08-19 1223 }
41d07074154c67 Alex Vesker 2019-08-19 1224
:::::: The code at line 1087 was first introduced by commit
:::::: 41d07074154c67a587b12d2b8a8cec3707e51eb7 net/mlx5: DR, Expose steering rule functionality
:::::: TO: Alex Vesker <valex@...lanox.com>
:::::: CC: Saeed Mahameed <saeedm@...lanox.com>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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