| From: |
| Davidlohr Bueso <dave@stgolabs.net> |
| To: |
| Thomas Gleixner <tglx@linutronix.de>, Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com> |
| Subject: |
| [PATCH -tip 0/4] rtmutex: Spin on owner |
| Date: |
| Tue, 19 May 2015 10:24:54 -0700 |
| Message-ID: |
| <1432056298-18738-1-git-send-email-dave@stgolabs.net> |
| Cc: |
| Steven Rostedt <rostedt@goodmis.org>, Mike Galbraith <umgwanakikbuti@gmail.com>, "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>, Sebastian Andrzej Siewior <bigeasy@linutronix.de>, Davidlohr Bueso <dave@stgolabs.net>, linux-kernel@vger.kernel.org |
| Archive‑link: | |
Article |
Hello,
First three patches are straightforward and found while
going through the code. Patch 4 is the actual meat of the
set, but similar to what we have already in regular mutexes.
While having optimistic spinning in rtmutexes is a desired
feature, I've marked it RFC as I could very well have missed
something inherint in the rt flavor.
Details in the individual patches. Passes pi tests from
Darren's futextest suite as well as all weekend running
pi_stress from rt-tests on a 60 core box.
Thanks!
Davidlohr Bueso (4):
locking/rtmutex: Implement lockless top-waiter wakeup
locking/rtmutex: Use cmp-cmpxchg
locking/rtmutex: Update stale plist comments
locking/rtmutex: Support spin on owner (osq)
include/linux/rtmutex.h | 4 ++
kernel/Kconfig.locks | 4 ++
kernel/locking/rtmutex.c | 175 +++++++++++++++++++++++++++++++++++++++++------
3 files changed, 162 insertions(+), 21 deletions(-)
--
2.1.4
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