On 2019/8/13 下午10:00, Dave Jones wrote:
On Tue, Aug 13, 2019 at 04:33:59PM +0800, Jason Wang wrote:
>
> On 2019/8/13 上午6:19, Dave Jones wrote:
> > On Wed, Aug 07, 2019 at 12:30:07AM +0000, Linux Kernel wrote:
> > > Commit: 4b663366246be1d1d4b1b8b01245b2e88ad9e706
> > > Parent: 16b2084a8afa1432d14ba72b7c97d7908e178178
> > > Web:
https://git.kernel.org/torvalds/c/4b663366246be1d1d4b1b8b01245b2e88ad9e706
> > > Author: Alexis Bauvin <abau...@scaleway.com>
> > > AuthorDate: Tue Jul 23 16:23:01 2019 +0200
> > >
> > > tun: mark small packets as owned by the tap sock
> > >
> > > - v1 -> v2: Move skb_set_owner_w to __tun_build_skb to reduce
patch size
> >
> > This commit breaks ipv6 routing when I deployed on it a linode.
> > It seems to work briefly after boot, and then silently all packets get
> > dropped. (Presumably, it's dropping RA or ND packets)
> >
> > With this reverted, everything works as it did in rc3.
> >
> Two questions:
>
> - Are you using XDP for TUN?
not knowingly.
$ grep XDP .config
# CONFIG_XDP_SOCKETS is not set
What's configured on the hypervisor side I have no idea.
Ok, please tell me more about your setups:
- Are you using TUN in host or guest?
- Are you using it for VM or VPN(tunneling)?
- Where did the packet get dropped?
> - Does it work before 66ccbc9c87c2?
that's been around since 4.14-rc1, and at one point it ran whatever was
in debian9 (4.9). I don't recall it ever not working, so I'd say yes.
I can build a 4.13 if it'll prove something, but it'll take me a while.
(This is my primary MX, so it's dropping email while it's on the broken
kernel, so I need to plan some time to be around to babysit it)
If possible please try that.
> If yes, could you show us the result of net_dropmonitor?
where do I get that? It doesn't seem packaged for debian.
Dave
It's part of perf-script(1). You can simply start it through perf script
record net_dropmonitor.
Thanks
