Comment 91 for bug 1684993

Revision history for this message
OpenContrail Admin (ci-admin-f) wrote : A change has been merged

Reviewed: https://review.opencontrail.org/46490
Committed: http://github.com/Juniper/contrail-controller/commit/f770d34b665cb6140b7be390891e29cd93c1ed00
Submitter: Zuul (<email address hidden>)
Branch: R4.1

commit f770d34b665cb6140b7be390891e29cd93c1ed00
Author: Ananth Suryanarayana <email address hidden>
Date: Wed Sep 19 14:29:53 2018 -0700

Do not insert already sleeping tbb task back into sleeping list

During testing, it was found that tbb sleeping threads singly linked
list was corrupted and had become circular. This seemingly caused
my_slack count to get permanently stuck at -1, as the sleeping list
traversal would potentially never end.

During testing, using a specific assert, it was confirmed that duplicate
insertion did happen.

Fixed it by modifying the sleeing threads singly linked list into a
doubly linked list and then making sure that a thread if already in
the list is never prepended back as the head of the list.

https://github.com/01org/tbb/issues/86

Change-Id: I052d397bf8b881c75e9ed6a8d17e7cbc1b12764b
Closes-Bug: #1684993
Depends-On: Ie5de2844a19843bec185e921a83bde4f55c1b6ed