[ovs-build] Passed: ovsrobot/ovs#3567 (series_229861 - 573495a)

[Travis CI]

Build Update for ovsrobot/ovs
-------------------------------------

Build: #3567
Status: Passed

Duration: 16 mins and 52 secs
Commit: 573495a (series_229861)
Author: Gaetan Rivet
Message: conntrack: Inverse conn and ct lock precedence

The lock priority order is for the global 'ct_lock' to be taken first
and then 'conn->lock'. This is an issue, as multiple operations on
connections are thus blocked between threads contending on the
global 'ct_lock'.

This was previously necessary due to how the expiration lists, timeout
policies and zone limits were managed. They are now using RCU-friendly
structures that allow concurrent readers. The mutual exclusion now only
needs to happen during writes.

This allows reducing the 'ct_lock' precedence, and to only take it
when writing the relevant structures. This will reduce contention on
'ct_lock', which impairs scalability when the connection tracker is
used by many threads.

Signed-off-by: Gaetan Rivet <grive at u256.net>
Reviewed-by: Eli Britstein <elibr at nvidia.com>
Signed-off-by: 0-day Robot <robot at bytheb.org>

View the changeset: https://github.com/ovsrobot/ovs/compare/ad9220ca6b7b...573495a56713

View the full build log and details: https://travis-ci.com/github/ovsrobot/ovs/builds/217392396?utm_medium=notification&utm_source=email


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