Thanks Illya for pointing out this, I checked if_packet.h in git.kernel.org by using v3.10 tag, it indeed can support TPACKET_V3
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/if_packet.h?h=v3.10 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/if_packet.h?h=v3.10#n225 #define TPACKET3_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll)) So we can safely support TPACKET_V3 only because ovs' minimal kernel requirement is 3.10.0 -----邮件原件----- 发件人: Ilya Maximets [mailto:i.maxim...@ovn.org] 发送时间: 2020年2月6日 19:11 收件人: ovs-dev@openvswitch.org; Yi Yang (杨燚)-云服务集团 <yangy...@inspur.com>; William Tu <u9012...@gmail.com> 抄送: Ben Pfaff <b...@ovn.org>; Ilya Maximets <i.maxim...@ovn.org> 主题: Re: [ovs-dev] [PATCH] Use TPACKET_V1/V2/V3 to accelerate veth for DPDK datapath > On Sun, Feb 2, 2020 at 8:06 PM Yi Yang (杨燚)-云服务集团 <yangyi01 at inspur.com> > wrote: >> >> Hi, William >> >> Sorry for last reply, I don't know why I always can't get your >> comments email from my outlook, Ben's comments are ok, I also can't >> see your comments in outlook junk box. >> >> About your comments in >> https://mail.openvswitch.org/pipermail/ovs-dev/2020-January/367146.ht >> ml, I checked it in my CentOS 7 which has 3.10.0 kernel, TPACKET_V3 >> sample code can work, so I'm ok to remove V1&V2 code. >> > > OK thank you for confirming that v3 works on 3.10 cento 7! FYI, rhel/centos 3.10 kernels has almost nothing in common with upstream 3.10 kernel. Best regards, Ilya Maximets. _______________________________________________ dev mailing list d...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-dev
