CentOS7 编译DPDK的问题记录

DPDK的make方式的编译方法百度下基本都差不多，参考链接在末尾哈。

这里讲述下本人在编译过程中遇到的问题，高手就不用看了，菜鸟的辛酸经历。

1. dpdk编译后没有igb_uio.ko, 没有kmod文件。

问题背景：CentOS Linux release 7.7.1908 + kernel >=3.16 + dpdk20.02

问题现象：dpdk20.02官网文档 中要求kernel >= 3.16， 且官网中说明dpdk20.02可以运行在CentOS7中。但编译过程中没有kmod文件产生，无论手动make编译、meson编译还是dpdk脚本编译。

可能原因：kernel-devel、kernel-headers和内核版本不是对应的。

查看命令：uname -a ; rpm -qa kernel\* | sort

可以通过以下方式安装和系统内核版本一致的：

yum install “kernel-devel-uname-r == $(uname -r)”
yum install “kernel-headers-uname-r == $(uname -r)”

但我的环境里不能升级到和内核一样的版本，因为对应的最新的版本。

解决办法：使用dpdk18.11.6或之前的版本，kernel-devel等版本最新到3.10.0-1062.12.1，所以kernel也是用的3.10

 

2. 编译问题：

/usr/src/kernels/3.10.0-1062.12.1.el7.x86_64/include/linux/init.h:318:7: 错误：‘cleanup_module’ specifies less restrictive attribute than its target ‘igbuio_pci_exit_module’: ‘cold’ [-Werror=missing-attributes]
  318 |  void cleanup_module(void) __attribute__((alias(#exitfn)));
      |       ^~~~~~~~~~~~~~
/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio/igb_uio.c:642:1: 附注：in expansion of macro ‘module_exit’
  642 | module_exit(igbuio_pci_exit_module);
      | ^~~~~~~~~~~
/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio/igb_uio.c:636:1: 附注：‘cleanup_module’ target declared here
  636 | igbuio_pci_exit_module(void)
      | ^~~~~~~~~~~~~~~~~~~~~~
cc1：所有的警告都被当作是错误
make[9]: *** [/usr/src/kernels/3.10.0-1062.12.1.el7.x86_64/scripts/Makefile.build:340：/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio/igb_uio.o] 错误 1
make[8]: *** [/usr/src/kernels/3.10.0-1062.12.1.el7.x86_64/Makefile:1316：_module_/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio] 错误 2
make[7]: *** [Makefile:140：sub-make] 错误 2
make[6]: *** [/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/mk/rte.module.mk:51：igb_uio.ko] 错误 2
make[5]: *** [/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/mk/rte.subdir.mk:37：igb_uio] 错误 2
make[4]: *** [/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/mk/rte.subdir.mk:37：linux] 错误 2
make[3]: *** [/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/mk/rte.sdkbuild.mk:51：kernel] 错误 2
make[2]: *** [/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/mk/rte.sdkroot.mk:101：all] 错误 2
make[1]: *** [/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/mk/rte.sdkinstall.mk:58：pre_install] 错误 2
make: *** [/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/mk/rte.sdkroot.mk:79：install] 错误 2

以及

/usr/src/kernels/3.10.0-1062.12.1.el7.x86_64/include/linux/init.h:312:6: 错误：‘init_module’ specifies less restrictive attribute than its target ‘igbuio_pci_init_module’: ‘cold’ [-Werror=missing-attributes]
  312 |  int init_module(void) __attribute__((alias(#initfn)));
      |      ^~~~~~~~~~~
/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio/igb_uio.c:641:1: 附注：in expansion of macro ‘module_init’
  641 | module_init(igbuio_pci_init_module);
      | ^~~~~~~~~~~
/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio/igb_uio.c:616:1: 附注：‘init_module’ target declared here
  616 | igbuio_pci_init_module(void)
      | ^~~~~~~~~~~~~~~~~~~~~~
cc1：所有的警告都被当作是错误
make[9]: *** [/usr/src/kernels/3.10.0-1062.12.1.el7.x86_64/scripts/Makefile.build:340：/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio/igb_uio.o] 错误 1
make[8]: *** [/usr/src/kernels/3.10.0-1062.12.1.el7.x86_64/Makefile:1316：_module_/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio] 错误 2
make[7]: *** [Makefile:140：sub-make] 错误 2
make[6]: *** [/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/mk/rte.module.mk:51：igb_uio.ko] 错误 2
make[5]: *** [/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/mk/rte.subdir.mk:37：igb_uio] 错误 2
make[4]: *** [/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/mk/rte.subdir.mk:37：linux] 错误 2
make[3]: *** [/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/mk/rte.sdkbuild.mk:51：kernel] 错误 2
make[2]: *** [/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/mk/rte.sdkroot.mk:101：all] 错误 2
make[1]: *** [/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/mk/rte.sdkinstall.mk:58：pre_install] 错误 2
make: *** [/home/samba_share/spdk/spdk-20.01/dpdk/dpdk-stable-18.11.6/mk/rte.sdkroot.mk:79：install] 错误 2
 

解决办法：在/usr/src/kernels/3.10.0-1062.12.1.el7.x86_64/include/linux/init.h中的

318 |  void cleanup_module(void) __attribute__((alias(#exitfn)));    ===》 改成 

          void cleanup_module(void) __cold __attribute__((alias(#exitfn)));

312 |  int init_module(void) __attribute__((alias(#initfn)));                ===》 改成

          int init_module(void) __cold __attribute__((alias(#initfn)));

 

dpdk官方文档：

DPDK20.02

DPDK18.11.6

参考链接：

https://blog.csdn.net/hn3e81/article/details/93054030?depth_1-utm_source=distribute.pc_relevant.none-task&utm_source=distribute.pc_relevant.none-task

https://blog.csdn.net/javaxflinux/article/details/86523870?depth_1-utm_source=distribute.pc_relevant.none-task&utm_source=distribute.pc_relevant.none-task

https://blog.csdn.net/cloudvtech/article/details/80221236?depth_1-utm_source=distribute.pc_relevant.none-task&utm_source=distribute.pc_relevant.none-task