[ovs-build] Passed: ovsrobot/ovs#3806 (series_238922 - 96b4025)
builds at travis-ci.com
Tue Apr 13 13:07:43 UTC 2021
Build Update for ovsrobot/ovs
Duration: 11 mins and 2 secs
Commit: 96b4025 (series_238922)
Author: Michal Kazior
Message: netlink: ignore IFLA_WIRELESS events
Some older wireless drivers - ones relying on the
old and long deprecated wireless extension ioctl
system - can generate quite a bit of IFLA_WIRELESS
events depending on their configuration and
runtime conditions. These are delivered as
RTNLGRP_LINK via RTM_NEWLINK messages.
These tend to be relatively easily identifiable
because they report the change mask being 0. This
isn't guaranteed but in practice it shouldn't be a
problem. None of the wireless events that I ever
observed actually carry any unique information
about netdev states that ovs-vswitchd is
interested in. Hence ignoring these shouldn't
cause any problems.
These events can be responsible for a significant
CPU churn as ovs-vswitchd attempts to do plenty of
work for each and every netlink message regardless
of what that message carries. On low-end devices
such as consumer-grade routers these can lead to a
lot of CPU cycles being wasted, adding up to heat
output and reducing performance.
It could be argued that wireless drivers in
question should be fixed, but that isn't exactly a
trivial thing to do. Patching ovs seems far more
viable while still making sense.
Signed-off-by: Michal Kazior <michal at plume.com>
Signed-off-by: 0-day Robot <robot at bytheb.org>
View the changeset: https://github.com/ovsrobot/ovs/commit/96b4025c3aef
View the full build log and details: https://travis-ci.com/github/ovsrobot/ovs/builds/222936936?utm_medium=notification&utm_source=email
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