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Date: Thu, 9 Jul 2015 12:32:21 -0400 From: Waiman Long <Waiman.Long@...com> To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, Arnd Bergmann <arnd@...db.de>, Thomas Gleixner <tglx@...utronix.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-tip v2 0/2] locking/qrwlock: Improve qrwlock performance v1->v2: - Take out patch 1 which had been merged to tip. - Take out patch 4 as the change may impact light load performance - Rebased to the latest tip branch In converting some existing spinlocks to rwlock, it was found that the write lock slowpath performance isn't as good as the qspinlock. This patch series tries to improve qrwlock performance to close the gap between qspinlock and qrwlock. With this patch series in place, we can start converting some spinlocks back to rwlocks where it makes sense and the lock size increase isn't a concern. Waiman Long (2): locking/qrwlock: Reduce reader/writer to reader lock transfer latency locking/qrwlock: Reduce writer to writer lock transfer latency kernel/locking/qrwlock.c | 32 +++++++++++++++++--------------- 1 files changed, 17 insertions(+), 15 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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