linux-kernel - [PATCH v5 0/3] locking/qrwlock: More optimizations in qrwlock

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Date:	Fri, 19 Jun 2015 11:49:59 -0400
From:	Waiman Long <Waiman.Long@...com>
To:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>, Arnd Bergmann <arnd@...db.de>
Cc:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	Will Deacon <will.deacon@....com>,
	Scott J Norton <scott.norton@...com>,
	Douglas Hatch <doug.hatch@...com>,
	Waiman Long <Waiman.Long@...com>
Subject: [PATCH v5 0/3] locking/qrwlock: More optimizations in qrwlock

v4->v5:
 - Add a new patch to rename function names to sync up to qspinlock
   naming convention.
 - Move the extended qrwlock structure to the header file as requested
   by Will Deacon so that it can also be used in the ARM's architecture
   specific code.

v3->v4:
 - Remove the unnecessary _QW_WMASK check in
   queue_read_lock_slowpath().

v2->v3:
 - Fix incorrect commit log message in patch 1.

v1->v2:
 - Add microbenchmark data for the second patch

This patch set contains 2 patches on qrwlock. The first one is to
optimize the interrupt context reader slowpath.  The second one is
to optimize the writer slowpath.


*** BLURB HERE ***

Waiman Long (3):
  locking/qrwlock: Rename functions to queued_*()
  locking/qrwlock: Better optimization for interrupt context readers
  locking/qrwlock: Don't contend with readers when setting _QW_WAITING

 arch/x86/include/asm/qrwlock.h      |    7 ++--
 include/asm-generic/qrwlock.h       |   58 +++++++++++++++++-----------------
 include/asm-generic/qrwlock_types.h |   18 ++++++++++-
 kernel/locking/qrwlock.c            |   29 ++++++++---------
 4 files changed, 63 insertions(+), 49 deletions(-)

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