Hi, This is a (painfully late) followup to proposal sometime ago to add spin on owner to rtmutexes. My first attempt was rather liberal in that I tried avoiding the pi-dance and let the lock be stolen. However, due to -rt constraints this series only deals with top-waiter, based on what we do in the preempt rt patchset.
First two patches are trivial and the whole patchset as survived a week of locktorture+pi_stress pounding at the same time without anything breaking. That said, I'm sure it needs more testing and eyeballs, these paths make my head hurt. Thanks! Davidlohr Bueso (3): rtmutex: Delete save_state member of struct rt_mutex rtmutex: Add rt_mutex_init_waiter helper rtmutex: Reduce top-waiter blocking on a lock include/linux/rtmutex.h | 1 - kernel/Kconfig.locks | 4 ++ kernel/futex.c | 5 +-- kernel/locking/rtmutex.c | 82 +++++++++++++++++++++++++++++++++++------ kernel/locking/rtmutex_common.h | 17 ++++++++- 5 files changed, 92 insertions(+), 17 deletions(-) -- 2.1.4
