** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1748232
Title:
rtnetlink: enable namespace identifying properties in rtnetlink
requests
Status in linux package in Ubuntu:
Confirmed
Bug description:
Hey,
I've recently pushed a couple of patches to enable IFLA_IF_NETNSID to
be passed in rtnetlink requests to avoid having to take the hit of
setns() to a network namespace and its owning user namespace when
performing operations on a target network namespace. This makes a lot
of costly operations for LXD through liblxc way cheaper. Juju is one
candidate that recently suffered from costs caused by lxc list on a
LXD instance with a lot of containers. If it's not too much trouble in
the current meltdown/spectre and pre-LTS release craziness it would be
really great if we could ensure that these patches make it into the
Bionic kernel and possibly be backported to the 16.04 kernel. The
16.04 kernel might be a little annoying though since it misses a few
pre-requisite patches but if you think that we can do it I can give
you the patches that you need to make it easier for you! Here are the
patches that are required for 4.15 in Bionic:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7c4f63ba824302492985553018881455982241d6
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c310bfcb6e1be993629c5747accf8e1c65fbb255
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b61ad68a9fe85d29d5363eb36860164a049723cf
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5bb8ed075428b71492734af66230aa0c07fcc515
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7973bfd8758d05c85ee32052a3d7d5d0549e91b4
There's one additional (security/hardening) patch which has been acked
and will very likely make it into 4.16 as well once Dave picks it up
and sends it to Linus. So I'm listing it here right away but if you
want to wait until it is fully upstream, I understand:
https://patchwork.ozlabs.org/patch/870363/
Thanks!
Christian
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