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(-)
