From: Tejun Heo <tj@kernel.org>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, Mel Gorman <mel@csn.ul.ie>,
Pekka Enberg <penberg@cs.helsinki.fi>,
Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>,
Rusty Russell <rusty@rustcorp.com.au>
Subject: Re: [this_cpu_xx V8 07/16] Module handling: Use this_cpu_xx to dynamically allocate counters
Date: Mon, 21 Dec 2009 17:19:15 +0900 [thread overview]
Message-ID: <4B2F2F83.4070901@kernel.org> (raw)
In-Reply-To: <4B2F2AE8.7060507@kernel.org>
On 12/21/2009 04:59 PM, Tejun Heo wrote:
> Here's the version I committed to percpu branch.
>
> Thanks.
>
> From 8af47ddd01364ae3c663c0bc92415c06fe887ba1 Mon Sep 17 00:00:00 2001
> From: Christoph Lameter <cl@linux-foundation.org>
> Date: Fri, 18 Dec 2009 16:26:24 -0600
> Subject: [PATCH] module: Use this_cpu_xx to dynamically allocate counters
>
> Use cpu ops to deal with the per cpu data instead of a local_t. Reduces memory
> requirements, cache footprint and decreases cycle counts.
>
> The this_cpu_xx operations are also used for !SMP mode. Otherwise we could
> not drop the use of __module_ref_addr() which would make per cpu data handling
> complicated. this_cpu_xx operations have their own fallback for !SMP.
>
> The last hold out of users of local_t is the tracing ringbuffer after this patch
> has been applied.
>
> Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
> Cc: Rusty Russell <rusty@rustcorp.com.au>
This was changed to Acked-by as Rusty acked on the previous thread.
Thanks.
--
tejun
next prev parent reply other threads:[~2009-12-21 8:16 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-18 22:26 [this_cpu_xx V8 00/16] Per cpu atomics in core allocators, cleanup and more this_cpu_ops Christoph Lameter
2009-12-18 22:26 ` [this_cpu_xx V8 01/16] this_cpu_ops: page allocator conversion Christoph Lameter
2009-12-18 22:26 ` [this_cpu_xx V8 02/16] this_cpu ops: Remove pageset_notifier Christoph Lameter
2009-12-18 22:26 ` [this_cpu_xx V8 03/16] Use this_cpu operations in slub Christoph Lameter
2009-12-20 9:11 ` Pekka Enberg
2009-12-18 22:26 ` [this_cpu_xx V8 04/16] SLUB: Get rid of dynamic DMA kmalloc cache allocation Christoph Lameter
2009-12-18 22:26 ` [this_cpu_xx V8 05/16] this_cpu: Remove slub kmem_cache fields Christoph Lameter
2009-12-18 22:26 ` [this_cpu_xx V8 06/16] Make slub statistics use this_cpu_inc Christoph Lameter
2009-12-18 22:26 ` [this_cpu_xx V8 07/16] Module handling: Use this_cpu_xx to dynamically allocate counters Christoph Lameter
2009-12-21 7:47 ` Tejun Heo
2009-12-21 7:59 ` Tejun Heo
2009-12-21 8:19 ` Tejun Heo [this message]
2009-12-21 23:28 ` Rusty Russell
2009-12-22 0:02 ` Tejun Heo
2009-12-22 16:17 ` Christoph Lameter
2009-12-22 15:58 ` Christoph Lameter
2009-12-22 15:57 ` Christoph Lameter
2009-12-23 2:07 ` Tejun Heo
2010-01-04 17:22 ` Christoph Lameter
2010-01-04 17:51 ` Mathieu Desnoyers
2009-12-18 22:26 ` [this_cpu_xx V8 08/16] Remove cpu_local_xx macros Christoph Lameter
2009-12-18 22:26 ` [this_cpu_xx V8 09/16] Allow arch to provide inc/dec functionality for each size separately Christoph Lameter
2009-12-21 7:25 ` Tejun Heo
2009-12-22 15:56 ` Christoph Lameter
2009-12-23 2:08 ` Tejun Heo
2009-12-18 22:26 ` [this_cpu_xx V8 10/16] Support generating inc/dec for this_cpu_inc/dec Christoph Lameter
2009-12-18 22:26 ` [this_cpu_xx V8 11/16] Generic support for this_cpu_cmpxchg Christoph Lameter
2009-12-19 14:45 ` Mathieu Desnoyers
2009-12-22 15:54 ` Christoph Lameter
2009-12-22 17:24 ` Mathieu Desnoyers
2010-01-04 17:21 ` Christoph Lameter
2010-01-05 22:29 ` Mathieu Desnoyers
2010-01-05 22:35 ` Christoph Lameter
2009-12-18 22:26 ` [this_cpu_xx V8 12/16] Add percpu cmpxchg operations Christoph Lameter
2009-12-18 22:26 ` [this_cpu_xx V8 13/16] Generic support for this_cpu_xchg Christoph Lameter
2009-12-18 22:26 ` [this_cpu_xx V8 14/16] x86 percpu xchg operation Christoph Lameter
2009-12-18 22:26 ` [this_cpu_xx V8 15/16] Generic support for this_cpu_add_return() Christoph Lameter
2009-12-18 22:26 ` [this_cpu_xx V8 16/16] x86 support for this_cpu_add_return Christoph Lameter
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