Public bug reported: 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 ** Affects: linux (Ubuntu) Importance: Undecided Status: Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1748232/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
