Joe, it is my bad. Our nsh patches added two pointer variables to " struct ovs_skb_cb", that increased its size by 16 bytes, but sk_buff.cb only has 48 bytes, when I build ovs with "--with-linux=..." option, sizeof(struct ovs_gso_cb) will be over 48 bytes, that is the root cause of this build issue. After I manage to remove those two pointer variables, it can be built successfully. But sizeof(struct ovs_gso_cb) is still 48 bytes, obviously it can't be extended any more in the future unless Linux kernel changes sk_buff.cb to bigger size.
-----Original Message----- From: Joe Stringer [mailto:[email protected]] Sent: Friday, December 2, 2016 2:21 AM To: Yang, Yi Y <[email protected]> Cc: [email protected]; [email protected] Subject: Re: [ovs-dev] What is the minimum Linux kernel version ovs 2.6.1 build requires? On 30 November 2016 at 04:58, Yang, Yi Y <[email protected]> wrote: > Hi, folks > > I tried to build ovs 2.6.1 in Ubuntu trusty 64 with the below configuration > options, but it failed, it is ok when I use the same way to build in Ubuntu > 16.04 which has Linux kernel 4.4. What is the minimum Linux kernel version > ovs 2.6.1 build requires? I'm surprised to see this; I regularly build master and branch-2.6 on Ubuntu 14.04 with linux 3.13 and 16.04 with linux 4.4. Which kernel version are you seeing this with? Can you also pastebin the $BUILD/datapath/linux/kcompat.h ? _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
