linux-kernel - [PATCH 0/3] powerpc/qspinlock: Some tuning updates

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Message-Id: <20210309015950.27688-1-dave@stgolabs.net>
Date:   Mon,  8 Mar 2021 17:59:47 -0800
From:   Davidlohr Bueso <dave@...olabs.net>
To:     npiggin@...il.com
Cc:     peterz@...radead.org, mingo@...hat.com, will@...nel.org,
        longman@...hat.com, mpe@...erman.id.au, benh@...nel.crashing.org,
        paulus@...ba.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, dave@...olabs.net
Subject: [PATCH 0/3] powerpc/qspinlock: Some tuning updates

Hi,

A few updates while going through the powerpc port of the qspinlock.

Patches 1 and 2 are straightforward, while patch 3 can be considered
more of an rfc as I've only tested on a single machine, and there
could be an alternative way if it doesn't end up being nearly a
universal performance win.

Thanks!

Davidlohr Bueso (3):
  powerpc/spinlock: Define smp_mb__after_spinlock only once
  powerpc/spinlock: Unserialize spin_is_locked
  powerpc/qspinlock: Use generic smp_cond_load_relaxed

 arch/powerpc/include/asm/barrier.h         | 16 ----------------
 arch/powerpc/include/asm/qspinlock.h       | 14 --------------
 arch/powerpc/include/asm/simple_spinlock.h |  6 +-----
 arch/powerpc/include/asm/spinlock.h        |  3 +++
 4 files changed, 4 insertions(+), 35 deletions(-)

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2.26.2