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Subject[PATCH net-next 0/2 v2] netns: uevent performance tweaks
Date
Hey everyone,

This is v2 of "netns: uevent performance tweaks" which contains *no
functional changes* just a minor indendation fix as requested by David.

Like Eric requested, I did extensive testing that prove significant
performance improvements when using per-netns uevent sequence numbers
with decoupled locks. The results and test descriptions were added to
the commit message of
[PATCH 2/2 v1] netns: isolate seqnums to use per-netns locks.

This series deals with a bunch of performance improvements when sending
out uevents that have been extensively discussed here:
https://lkml.org/lkml/2018/4/10/592

- Only record uevent sockets from network namespaces owned by the
initial user namespace in the global uevent socket list.
Eric, this is the exact patch we agreed upon in
https://lkml.org/lkml/2018/4/10/592.
A very detailed rationale is present in the commit message for
[PATCH 1/2] netns: restrict uevents
- Decouple the locking for network namespaces in the global uevent
socket list from the locking for network namespaces not in the global
uevent socket list.
A very detailed rationale including performance test results is
present in the commit message for
[PATCH 2/2] netns: isolate seqnums to use per-netns locks

Thanks!
Christian

Christian Brauner (2):
netns: restrict uevents
netns: isolate seqnums to use per-netns locks

include/linux/kobject.h | 2 +
include/net/net_namespace.h | 3 +
kernel/ksysfs.c | 11 +++-
lib/kobject_uevent.c | 122 ++++++++++++++++++++++++++++--------
net/core/net_namespace.c | 14 +++++
5 files changed, 126 insertions(+), 26 deletions(-)

--
2.17.0

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