Comment 71 for bug 1684993

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

Reviewed: https://review.opencontrail.org/46339
Committed: http://github.com/Juniper/contrail-third-party/commit/92489e37bb67d48fe8eaa07b1d689672e144e0db
Submitter: Zuul v3 CI (<email address hidden>)
Branch: R5.0

commit 92489e37bb67d48fe8eaa07b1d689672e144e0db
Author: Ananth Suryanarayana <email address hidden>
Date: Wed Sep 19 18:50:49 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

Closes-Bug: #1684993
Change-Id: I6773eb8dddd849cebb695a59864a9da2ce2faa17
Depends-On: Iec821e3b08c3825cf2789a70bf53621650c66516