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/46531 github. com/Juniper/ contrail- controller/ commit/ 8542634c95fb141 fc37ca6c50bb2fe b89ee98a2e
Committed: http://
Submitter: Zuul v3 CI (<email address hidden>)
Branch: master
commit 8542634c95fb141 fc37ca6c50bb2fe b89ee98a2e
Author: Ananth Suryanarayana <email address hidden>
Date: Wed Sep 19 18:51:43 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: I1c08787cf74a12 b5486189eb0dc69 cd524ed4170 19c42e4166015c9 216466c6865
Closes-Bug: #1684993
Depends-On: I84993a23b4524f