PATCH 1~2 mainly fix the deadline PI crash happened when doing
enqueue_task_dl()->rt_mutex_get_top_task() due to not holding
rq lock for the top waiter update.
PATCH 3~6 mainly fix the deadline PI issue happened when doing
enqueue_task_dl() after get @pi_task, and access pi_task's data
(dl.dl_runtime and dl.dl_period), because the access is not
holding any lock(pi lock or rq lock) of pi_task's. PATCH 3~4 are
separated out to make PATCH 5 smaller and easier to reviewers.
The two issues can be fixed using the same logic, so bind them
together as one series.
Xunlei Pang (6):
rtmutex: Deboost before waking up the top waiter
sched/rtmutex/deadline: Fix a PI crash for deadline tasks
rtmutex: Move "rt_mutex_waiter" definition to
"include/linux/rtmutex.h"
sched: Move dl_policy() to "include/linux/sched.h"
sched/deadline/rtmutex: Fix unprotected PI access in enqueue_task_dl()
sched/deadline/rtmutex: Don't miss the dl_runtime/dl_period update
include/linux/init_task.h | 3 +-
include/linux/rtmutex.h | 29 +++++++++++++-
include/linux/sched.h | 10 ++++-
include/linux/sched/deadline.h | 22 +++++++++++
kernel/fork.c | 1 +
kernel/futex.c | 5 +--
kernel/locking/rtmutex.c | 84 ++++++++++++++++++++++++++++-------------
kernel/locking/rtmutex_common.h | 22 +----------
kernel/sched/core.c | 2 +
kernel/sched/deadline.c | 10 +++--
kernel/sched/sched.h | 4 --
11 files changed, 132 insertions(+), 60 deletions(-)
--
1.8.3.1
