linux-kernel - Re: [PATCH 12/35] workqueue: update cwq alignement

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Date:	Tue, 29 Jun 2010 17:47:39 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	torvalds@...ux-foundation.org, mingo@...e.hu,
	linux-kernel@...r.kernel.org, jeff@...zik.org,
	akpm@...ux-foundation.org, rusty@...tcorp.com.au,
	cl@...ux-foundation.org, dhowells@...hat.com,
	arjan@...ux.intel.com, oleg@...hat.com, axboe@...nel.dk,
	dwalker@...eaurora.org, stefanr@...6.in-berlin.de,
	florian@...kler.org, andi@...stfloor.org, mst@...hat.com,
	randy.dunlap@...cle.com
Subject: Re: [PATCH 12/35] workqueue: update cwq alignement

On Tue, Jun 29, 2010 at 05:42:22PM +0200, Tejun Heo wrote:
> Hello,
> 
> On 06/29/2010 02:36 PM, Frederic Weisbecker wrote:
> > But then, if each cpu pointers are aligned, the struct itself doesn't need
> > to be aligned in its size right? It would need to if multiple elements
> > were allocated per cpu but for this struct we only have one per cpu. So
> > what seems to matter wrt alignment is only the base pointer of these structs,
> > not the size.
> 
> Yeap, sure, but how does it matter?


It means the size of the struct itself doesn't need to aligned to anything.

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