[ovs-build] Passed: ovsrobot/ovs#2330 (series_162172 - 4845ca4)

Travis CI builds at travis-ci.org
Tue Mar 3 16:35:56 UTC 2020

Build Update for ovsrobot/ovs

Build: #2330
Status: Passed

Duration: 50 mins and 25 secs
Commit: 4845ca4 (series_162172)
Author: Yanqin Wei
Message: lib: use acquire-release semantics for pvector size

Read/write concurrency of pvector library is implemented by a temp vector
and RCU protection. Considering performance reason, insertion does not
follow this scheme.
In insertion function, a thread fence ensures size incrementation is done
after new entry is stored. But there is no barrier in the iteration
fuction(pvector_cursor_init). Entry point access may be reordered before
loading vector size, so the invalid entry point may be loaded when vector
This patch fixes it by acquire-release pair. It can guarantee new size is
observed by reader after new entry stored by writer. And this is
implemented by one-way barrier instead of two-way memory fence.

Fixes: fe7cfa5c3f19 ("lib/pvector: Non-intrusive RCU priority vector.")
Reviewed-by: Gavin Hu <Gavin.Hu at arm.com>
Reviewed-by: Lijian Zhang <Lijian.Zhang at arm.com>
Signed-off-by: Yanqin Wei <Yanqin.Wei at arm.com>
Signed-off-by: 0-day Robot <robot at bytheb.org>

View the changeset: https://github.com/ovsrobot/ovs/commit/4845ca470b0f

View the full build log and details: https://travis-ci.org/ovsrobot/ovs/builds/657810796?utm_medium=notification&utm_source=email


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