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From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
To: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux-foundation.org>,
	linux-kernel@vger.kernel.org, Mel Gorman <mel@csn.ul.ie>,
	Pekka Enberg <penberg@cs.helsinki.fi>,
	Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [this_cpu_xx V7 0/8] Per cpu atomics in core allocators and cleanup
Date: Tue, 15 Dec 2009 20:40:31 -0500	[thread overview]
Message-ID: <20091216014031.GA12282@Krystal> (raw)
In-Reply-To: <4B2830CC.7040309@kernel.org>

* Tejun Heo (tj@kernel.org) wrote:
> Hello, Mathieu.
> 
> On 12/16/2009 02:43 AM, Mathieu Desnoyers wrote:
> > So I think accessing the "local_t offset" through percpu pointers should
> > be fine if I allocate struct ltt_chanbuf through the per cpu API.
> > However, I wonder how to deal with the commit_count counters, because
> > there is an indirection level.
> 
> Are they different in numbers for different cpus?

Nope, there is the same number of sub-buffers for each per-cpu buffer.
I just want to see if supplementary indirections are allowed after
dereferencing the per-cpu pointer ?

Thanks,

Mathieu

> 
> Thanks.
> 
> -- 
> tejun

-- 
Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68

  reply	other threads:[~2009-12-16  1:40 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-12-14 22:03 [this_cpu_xx V7 0/8] Per cpu atomics in core allocators and cleanup Christoph Lameter
2009-12-14 22:03 ` [this_cpu_xx V7 1/8] this_cpu_ops: page allocator conversion Christoph Lameter
2009-12-15  3:53   ` Tejun Heo
2009-12-15 15:04     ` Christoph Lameter
2009-12-16  0:53       ` Tejun Heo
2009-12-16 14:55         ` Christoph Lameter
2009-12-17  0:23           ` Tejun Heo
2009-12-14 22:03 ` [this_cpu_xx V7 2/8] this_cpu ops: Remove pageset_notifier Christoph Lameter
2009-12-14 22:03 ` [this_cpu_xx V7 3/8] Use this_cpu operations in slub Christoph Lameter
2009-12-14 22:03 ` [this_cpu_xx V7 4/8] SLUB: Get rid of dynamic DMA kmalloc cache allocation Christoph Lameter
2009-12-14 22:03 ` [this_cpu_xx V7 5/8] this_cpu: Remove slub kmem_cache fields Christoph Lameter
2009-12-14 22:03 ` [this_cpu_xx V7 6/8] Make slub statistics use this_cpu_inc Christoph Lameter
2009-12-15  6:24   ` Eric Dumazet
2009-12-15 14:46     ` Christoph Lameter
2009-12-15 14:59       ` Eric Dumazet
2009-12-14 22:03 ` [this_cpu_xx V7 7/8] Module handling: Use this_cpu_xx to dynamically allocate counters Christoph Lameter
2009-12-15  4:03   ` Tejun Heo
2009-12-15 22:41     ` Rusty Russell
2009-12-16 16:10       ` Christoph Lameter
2009-12-17  0:25         ` Tejun Heo
2009-12-17  5:42           ` Rusty Russell
2009-12-14 22:03 ` [this_cpu_xx V7 8/8] Remove cpu_local_xx macros Christoph Lameter
2009-12-15  4:04   ` Tejun Heo
2009-12-15  6:37 ` [this_cpu_xx V7 0/8] Per cpu atomics in core allocators and cleanup Pekka Enberg
2009-12-15  6:47   ` Tejun Heo
2009-12-15 14:50     ` Christoph Lameter
2009-12-15 17:06 ` Mel Gorman
2009-12-16 14:44   ` Christoph Lameter
2009-12-16 21:36     ` Christoph Lameter
2009-12-15 17:43 ` Mathieu Desnoyers
2009-12-16  0:58   ` Tejun Heo
2009-12-16  1:40     ` Mathieu Desnoyers [this message]
2009-12-16  1:46       ` Tejun Heo
2009-12-17 13:39         ` Mathieu Desnoyers
2009-12-17 19:28           ` Christoph Lameter
2009-12-17 20:25             ` Mathieu Desnoyers
2009-12-17 20:43               ` Christoph Lameter
2009-12-18  0:13                 ` Mathieu Desnoyers
2009-12-18  0:27                   ` Christoph Lameter

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