From: Tejun Heo <tj@kernel.org>
To: cl@linux-foundation.org
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
mingo@elte.hu, rusty@rustcorp.com.au,
Pekka Enberg <penberg@cs.helsinki.fi>
Subject: Re: [this_cpu_xx V4 11/20] RCU: Use this_cpu operations
Date: Sat, 03 Oct 2009 19:52:30 +0900 [thread overview]
Message-ID: <4AC72CEE.4010705@kernel.org> (raw)
In-Reply-To: <20091001212559.690311062@gentwo.org>
cl@linux-foundation.org wrote:
> RCU does not do dynamic allocations but it increments per cpu variables
> a lot. These instructions results in a move to a register and then back
> to memory. This patch will make it use the inc/dec instructions on x86
> that do not need a register.
>
> Acked-by: Tejun Heo <tj@kernel.org>
> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
> Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Patch titles slightly cleaned up and 0001-0011 are committed and
published to percpu#for-next.
Thanks.
--
tejun
next prev parent reply other threads:[~2009-10-03 10:51 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-01 21:25 [this_cpu_xx V4 00/20] Introduce per cpu atomic operations and avoid per cpu address arithmetic cl
2009-10-01 21:25 ` [this_cpu_xx V4 01/20] Introduce this_cpu_ptr() and generic this_cpu_* operations cl
2009-10-02 9:16 ` Tejun Heo
2009-10-02 9:34 ` Ingo Molnar
2009-10-02 17:11 ` Christoph Lameter
2009-10-06 10:04 ` Rusty Russell
2009-10-06 23:39 ` Christoph Lameter
2009-10-06 23:55 ` Tejun Heo
2009-10-08 17:57 ` [Patchs vs. percpu-next] Use this_cpu_xx to dynamically allocate counters Christoph Lameter
2009-10-13 11:51 ` Rusty Russell
2009-10-08 18:06 ` Christoph Lameter
2009-10-01 21:25 ` [this_cpu_xx V4 02/20] this_cpu: X86 optimized this_cpu operations cl
2009-10-02 9:18 ` Tejun Heo
2009-10-02 9:59 ` Ingo Molnar
2009-10-03 19:33 ` Pekka Enberg
2009-10-04 16:47 ` Ingo Molnar
2009-10-04 16:51 ` Pekka Enberg
2009-10-01 21:25 ` [this_cpu_xx V4 03/20] Use this_cpu operations for SNMP statistics cl
2009-10-01 21:25 ` [this_cpu_xx V4 04/20] Use this_cpu operations for NFS statistics cl
2009-10-01 21:25 ` [this_cpu_xx V4 05/20] use this_cpu ops for network statistics cl
2009-10-01 21:25 ` [this_cpu_xx V4 06/20] this_cpu_ptr: Straight transformations cl
2009-10-01 21:25 ` [this_cpu_xx V4 07/20] this_cpu_ptr: Eliminate get/put_cpu cl
2009-10-01 21:25 ` [this_cpu_xx V4 08/20] this_cpu_ptr: xfs_icsb_modify_counters does not need "cpu" variable cl
2009-10-01 21:25 ` [this_cpu_xx V4 09/20] Use this_cpu_ptr in crypto subsystem cl
2009-10-01 21:25 ` [this_cpu_xx V4 10/20] Use this_cpu ops for VM statistics cl
2009-10-01 21:25 ` [this_cpu_xx V4 11/20] RCU: Use this_cpu operations cl
2009-10-03 10:52 ` Tejun Heo [this message]
2009-10-01 21:25 ` [this_cpu_xx V4 12/20] Move early initialization of pagesets out of zone_wait_table_init() cl
2009-10-02 14:16 ` Mel Gorman
2009-10-02 17:30 ` Christoph Lameter
2009-10-05 9:35 ` Mel Gorman
2009-10-03 10:29 ` Tejun Heo
2009-10-05 14:39 ` Christoph Lameter
2009-10-05 15:01 ` Tejun Heo
2009-10-05 15:06 ` Christoph Lameter
2009-10-05 15:21 ` Tejun Heo
2009-10-05 15:28 ` Christoph Lameter
2009-10-05 15:41 ` Tejun Heo
2009-10-05 15:39 ` Christoph Lameter
2009-10-01 21:25 ` [this_cpu_xx V4 13/20] this_cpu_ops: page allocator conversion cl
2009-10-02 15:14 ` Mel Gorman
2009-10-02 17:39 ` Christoph Lameter
2009-10-05 9:45 ` Mel Gorman
2009-10-05 14:43 ` Christoph Lameter
2009-10-05 14:55 ` Christoph Lameter
2009-10-06 9:45 ` Mel Gorman
2009-10-06 16:34 ` Christoph Lameter
2009-10-06 17:03 ` Mel Gorman
2009-10-06 17:51 ` Christoph Lameter
2009-10-06 18:36 ` Mel Gorman
2009-10-06 19:06 ` Christoph Lameter
2009-10-07 10:42 ` Mel Gorman
2009-10-01 21:25 ` [this_cpu_xx V4 14/20] this_cpu ops: Remove pageset_notifier cl
2009-10-01 21:25 ` [this_cpu_xx V4 15/20] Use this_cpu operations in slub cl
2009-10-01 21:25 ` [this_cpu_xx V4 16/20] SLUB: Get rid of dynamic DMA kmalloc cache allocation cl
2009-10-01 21:25 ` [this_cpu_xx V4 17/20] this_cpu: Remove slub kmem_cache fields cl
2009-10-01 21:25 ` [this_cpu_xx V4 18/20] Make slub statistics use this_cpu_inc cl
2009-10-01 21:25 ` [this_cpu_xx V4 19/20] this_cpu: slub aggressive use of this_cpu operations in the hotpaths cl
2009-10-01 21:25 ` [this_cpu_xx V4 20/20] SLUB: Experimental new fastpath w/o interrupt disable cl
2009-10-02 9:30 ` [this_cpu_xx V4 00/20] Introduce per cpu atomic operations and avoid per cpu address arithmetic Tejun Heo
2009-10-02 9:54 ` Ingo Molnar
2009-10-02 17:15 ` Christoph Lameter
2009-10-02 17:32 ` Ingo Molnar
2009-10-02 17:49 ` Christoph Lameter
2009-10-02 17:10 ` Christoph Lameter
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