Hello, Thanks for giving me the original patch! I backported it along with some of the following commits to 2.0.8 and it seems to work too. The whole diff is https://git.grifon.fr/alarig/SwordArMor-gentoo-overlay/src/branch/master/net-misc/bird/files/bird-2.0.8-linux-netlink-filters.patch
I will test it on old kernels too, and if it works, I’m planning to include it in the gentoo package. On Sat 19 Feb 2022 01:44:43 GMT, Ondrej Zajicek wrote: > On Sat, Feb 19, 2022 at 12:44:11AM +0100, Alarig Le Lay wrote: > > Hello, > > > > I gave the 2.0.9 git snapshot (71c9484b00b4428ae6c7d7c8eea6d96073683a54) > > a try tonight, and it seems to fix the issue for me. I’ve not tested on > > 5.10 though, as the LTS is now 5.15. > > However, I did test 5.15 with 2.0.8 and I had the same behaviour. > > > > The VM is up for 6h now and everything is stable. Before, the logs were > > flooded within an hour. > > Hello > > Thanks for confirming it. That is likely an issue investigated and fixed > by Tomas Hlavacek: > > http://trubka.network.cz/pipermail/bird-users/2022-January/015909.html > > > > On Fri 24 Sep 2021 23:29:25 GMT, Alarig Le Lay wrote: > > > Hello, > > > > > > Now that the IPv6 bug is supposed to be resolved since 5.8, I tried to > > > upgrade a router from 4.14 to 5.10 > > > > > > Bird starts, however while inserting routes to FIB, I have long I/O loop > > > cycles and at some point bird is unable to keep up. > > > I already recompiled bird in case of a header change or something like > > > that, and to switch to a pre-compiled kernel, neither have any effect. > > > > > > When bird begins to loose track of itself, I have this kind of messages: > > > Sep 24 08:44:43 edge04-hostzealot bird: Netlink: File exists > > > Sep 24 08:44:43 edge04-hostzealot bird: Netlink: File exists > > > Sep 24 08:44:43 edge04-hostzealot bird: Netlink: File exists > > > Sep 24 08:44:43 edge04-hostzealot bird: Netlink: File exists > > > Sep 24 08:44:43 edge04-hostzealot bird: Netlink: File exists > > > Sep 24 08:44:43 edge04-hostzealot bird: ... > > > Sep 24 08:44:43 edge04-hostzealot bird: I/O loop cycle took 28703 ms for > > > 1 events > > > Sep 24 08:44:43 edge04-hostzealot bird: Kernel dropped some netlink > > > messages, will resync on next scan. > > > Sep 24 08:45:50 edge04-hostzealot bird: Netlink: File exists > > > Sep 24 08:45:50 edge04-hostzealot bird: Netlink: File exists > > > Sep 24 08:45:50 edge04-hostzealot bird: Netlink: File exists > > > Sep 24 08:45:50 edge04-hostzealot bird: Netlink: File exists > > > Sep 24 08:45:50 edge04-hostzealot bird: Netlink: File exists > > > Sep 24 08:45:50 edge04-hostzealot bird: ... > > > Sep 24 08:45:51 edge04-hostzealot bird: I/O loop cycle took 36201 ms for > > > 1 events > > > > > > And then ospf begins to flap and routes are re-calculated based on > > > remaining bgp ones. > > > Sep 24 08:46:54 edge04-hostzealot bird: Next hop address 185.107.95.180 > > > resolvable through recursive route for 185.107.92.0/22 > > > (I have a way more specific route in OSPF) > > > > > > I activated the debug, and I can see that bird is re-scanning the entire > > > kernel table when the “I/O loop” message appears > > > Sep 24 09:07:30 edge04-hostzealot bird: kernel_grt_ipv4: 1.0.0.0/24: seen > > > Sep 24 09:07:30 edge04-hostzealot bird: kernel_grt_ipv4: 1.0.4.0/24: seen > > > > > > And it tries to insert already inserted routes > > > Sep 24 09:08:04 edge04-hostzealot bird: kernel_grt_ipv4: 122.76.248.0/23: > > > installing > > > Sep 24 09:08:04 edge04-hostzealot bird: Netlink: File exists > > > > > > And then OSPF is clearly going down > > > Sep 24 09:08:04 edge04-hostzealot bird: ospf_ipv4: Inactivity timer > > > expired for nbr 45.91.126.248 on gre4 > > > Sep 24 09:08:04 edge04-hostzealot bird: ospf_ipv4: Neighbor 45.91.126.248 > > > on gre4 changed state from Full to Down > > > Sep 24 09:08:04 edge04-hostzealot bird: ospf_ipv4: Neighbor 45.91.126.248 > > > on gre4 removed > > > > > > Here are some more detailed logs: https://paste.swordarmor.fr/raw/HX45 > > > https://paste.swordarmor.fr/raw/oM9s > > > > > > This server isn’t the fastest one on the marked, but stuffed enough to > > > handle full views. And with an older kernel it works very well. > > > > > > I have RRs running on 5.10 kernels, so it’s more likely a kernel issue, > > > but I’m not able to determine if it’s caused by the kernel itself or by > > > the way bird is using netlink. > > > > > > I’m using bird 2.0.8, I didn’t try an older version. > > > -- > Elen sila lumenn' omentielvo > > Ondrej 'Santiago' Zajicek (email: [email protected]) > OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net) > "To err is human -- to blame it on a computer is even more so."
