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.
Reviewed: https:/ /review. opencontrail. org/46530 github. com/Juniper/ contrail- third-party/ commit/ c0c55a572419876 af53112ac0e4de5 ba6d06de81
Committed: http://
Submitter: Zuul v3 CI (<email address hidden>)
Branch: master
commit c0c55a572419876 af53112ac0e4de5 ba6d06de81
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
Change-Id: I84993a23b4524f 19c42e4166015c9 216466c6865
Closes-Bug: #1684993