From: Christoph Lameter <cl@linux.com>
To: akpm@linux-foundation.org
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: linux-kernel@vger.kernel.org
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Tejun Heo <tj@kernel.org>
Subject: [rfc: cpuops adv V1 0/8] Cmpxchg and xchg support for cpu ops
Date: Thu, 02 Dec 2010 15:53:40 -0600 [thread overview]
Message-ID: <20101202215340.562309713@linux.com> (raw)
This is a patchset on top of the thiscpuops upgrade patchset. It
adds cmpxchg and xchg support and uses that to improve various
kernel subsystem.
For vm statistics we can avoid interrupt enable/disable which reduces
the latencies of the vm counter updates to a fraction.
The slub fastpaths and slowpaths can decrease their cycle count. In
particular it is possible to improve the performance of the free slowpath.
next reply other threads:[~2010-12-02 21:54 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-02 21:53 Christoph Lameter [this message]
2010-12-02 21:53 ` [rfc: cpuops adv V1 1/8] percpu: generic this_cpu_cmpxchg() and this_cpu_cmpxchg_double support Christoph Lameter
2010-12-02 21:53 ` [rfc: cpuops adv V1 2/8] --- include/linux/percpu.h | 31 +++---------------------------- 1 file changed, 3 insertions(+), 28 deletions(-) Christoph Lameter
2010-12-02 22:06 ` [rfc: cpuops adv V1 2/8] Fallback to atomic xchg, cmpxchg Christoph Lameter
2010-12-02 21:53 ` [rfc: cpuops adv V1 3/8] x86: this_cpu_cmpxchg and this_cpu_cmpxchg_double operations Christoph Lameter
2010-12-06 17:14 ` Avi Kivity
2010-12-06 17:35 ` Christoph Lameter
2010-12-07 9:31 ` Avi Kivity
2010-12-02 21:53 ` [rfc: cpuops adv V1 4/8] irq_work: Use per cpu atomics instead of regular atomics Christoph Lameter
2010-12-02 21:53 ` [rfc: cpuops adv V1 5/8] vmstat: User per cpu atomics to avoid interrupt disable / enable Christoph Lameter
2010-12-02 21:53 ` [rfc: cpuops adv V1 6/8] Lockless (and preemptless) fastpaths for slub Christoph Lameter
2010-12-02 21:53 ` [rfc: cpuops adv V1 7/8] slub: Add PageSlubPartial Christoph Lameter
2010-12-02 21:53 ` [rfc: cpuops adv V1 8/8] slub: [RFC] Partially lockless freepath slowpath Christoph Lameter
2010-12-04 19:29 ` [rfc: cpuops adv V1 0/8] Cmpxchg and xchg support for cpu ops Pekka Enberg
2010-12-04 19:31 ` Tejun Heo
2010-12-06 15:52 ` Christoph Lameter
2010-12-06 15:51 ` Christoph Lameter
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