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Message-Id: <1464713631-1066-1-git-send-email-Waiman.Long@hpe.com>
Date: Tue, 31 May 2016 12:53:46 -0400
From: Waiman Long <Waiman.Long@....com>
To: Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>
Cc: linux-kernel@...r.kernel.org,
Pan Xinhui <xinhui@...ux.vnet.ibm.com>,
Boqun Feng <boqun.feng@...il.com>,
Scott J Norton <scott.norton@....com>,
Douglas Hatch <doug.hatch@....com>,
Waiman Long <Waiman.Long@....com>
Subject: [PATCH v2 0/5] locking/pvqspinlock: Fix missed PV wakeup & support PPC
v1->v2:
- Adds a patch to make pv_unhash() atomic to prevent racing.
- Adds 2 more patches to update the pvstat code.
Patch 1 separates the wait_again and spurious wakeup stat counters
so that the former is for the queue head only and the latter is for
the non-head queue nodes.
Patch 2 fixes the missed PV wakeup problem as reported by Pan Xinhui.
Patch 3 makes pv_unhash() atomic to fix another potential racing problem
reported by Boqun Feng.
Patch 4 adds a new pvstat counter to track the rare _Q_SLOW_VAL racing.
Patch 5 adds a new argument to pv_wait() to provide better support
for PPC.
Waiman Long (5):
locking/pvstat: Separate wait_again and spurious wakeup stats
locking/pvqspinlock: Fix missed PV wakeup problem
locking/pvqspinlock: Make pv_unhash() atomic
locking/pvstat: Add stat counter to track _Q_SLOW_VAL race
locking/pvqspinlock: Add lock holder CPU argument to pv_wait()
arch/x86/include/asm/paravirt.h | 4 +-
arch/x86/include/asm/paravirt_types.h | 2 +-
arch/x86/kernel/kvm.c | 2 +-
arch/x86/xen/spinlock.c | 2 +-
kernel/locking/qspinlock.c | 5 +-
kernel/locking/qspinlock_paravirt.h | 189 ++++++++++++++++++++++++---------
kernel/locking/qspinlock_stat.h | 17 ++--
7 files changed, 159 insertions(+), 62 deletions(-)
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