Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1236722

[PATCH -tip v3 0/5] locking: Use acquire/release semantics

Show all headers | View raw

Changes from v2:
 o Redid changelog for patches 2-5 (tglx)

Changes from v1:
 o Fix bogus acquire in generic rwsem lock downgrade (Linus)
 o Fix bogus acquire in unlock_rt_mutex_safe() (tglx)

Hi,

This series continues porting users to Will's new _{acquire|release|relaxed}
optimizations for weakly ordered archs -- and in practice, arm64 being the only
actual user we have, thus could use a _lot_ more testing. While we have osq in
-tip recently, along with Waiman's one for native qspinlocks, the following
patches pretty much complete the move over for all things kernel/locking/*.
Of course, particular primitives can be found in the obvious patch titles. Note
that patch 1 adds the necessary machinery to fully support some locks, such as
rwsems.

Compiles on x86 and x86-64.

Thanks!

Davidlohr Bueso (5):
  asm-generic: Add _{relaxed|acquire|release}() variants for inc/dec
    atomics
  locking/mutex: Use acquire/release semantics
  locking/rtmutex: Use acquire/release semantics
  locking/mcs: Use acquire/release semantics
  locking/rwsem: Use acquire/release semantics

 include/asm-generic/atomic-long.h | 29 +++++++-----
 include/asm-generic/mutex-dec.h   |  8 ++--
 include/asm-generic/mutex-xchg.h  | 10 ++--
 include/asm-generic/rwsem.h       | 21 ++++++---
 include/linux/atomic.h            | 97 +++++++++++++++++++++++++++++++++++++++
 kernel/locking/mcs_spinlock.h     |  4 +-
 kernel/locking/mutex.c            |  9 ++--
 kernel/locking/rtmutex.c          | 30 ++++++++----
 kernel/locking/rwsem-xadd.c       |  5 +-
 9 files changed, 168 insertions(+), 45 deletions(-)

--
2.1.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH -tip v3 0/5] locking: Use acquire/release semantics Davidlohr Bueso <dave@stgolabs.net> - 2015-09-30 22:10 +0200
  [PATCH 5/5] locking/rwsem: Use acquire/release semantics Davidlohr Bueso <dave@stgolabs.net> - 2015-09-30 22:10 +0200
  [PATCH 1/5] asm-generic: Add _{relaxed|acquire|release}() variants for inc/dec atomics Davidlohr Bueso <dave@stgolabs.net> - 2015-09-30 22:10 +0200
    Re: [PATCH 1/5] asm-generic: Add _{relaxed|acquire|release}()  variants for inc/dec atomics Peter Zijlstra <peterz@infradead.org> - 2015-10-01 08:40 +0200
      Re: [PATCH 1/5] asm-generic: Add _{relaxed|acquire|release}()  variants for inc/dec atomics Will Deacon <will.deacon@arm.com> - 2015-10-05 19:40 +0200
        Re: [PATCH 1/5] asm-generic: Add _{relaxed|acquire|release}()  variants for inc/dec atomics Peter Zijlstra <peterz@infradead.org> - 2015-10-05 21:50 +0200
  [PATCH 3/5] locking/rtmutex: Use acquire/release semantics Davidlohr Bueso <dave@stgolabs.net> - 2015-09-30 22:10 +0200
  Re: [PATCH -tip v3 0/5] locking: Use acquire/release semantics Thomas Gleixner <tglx@linutronix.de> - 2015-09-30 22:40 +0200

csiph-web