linux-kernel - Re: [PATCH v2 16/31] workqueue: introduce workqueue

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Message-ID: <20130305223434.GB1227@htj.dyndns.org>
Date:	Tue, 5 Mar 2013 14:34:34 -0800
From:	Tejun Heo <tj@...nel.org>
To:	Ryan Mallon <rmallon@...il.com>
Cc:	linux-kernel@...r.kernel.org, laijs@...fujitsu.com,
	axboe@...nel.dk, jmoyer@...hat.com, zab@...hat.com,
	kbuild test robot <fengguang.wu@...el.com>
Subject: Re: [PATCH v2 16/31] workqueue: introduce workqueue_attrs

On Tue, Mar 05, 2013 at 02:33:27PM -0800, Tejun Heo wrote:
> Hello, Ryan.
> 
> On Wed, Mar 06, 2013 at 09:29:35AM +1100, Ryan Mallon wrote:
> > > @@ -148,6 +148,8 @@ struct worker_pool {
> > >  	struct mutex		assoc_mutex;	/* protect POOL_DISASSOCIATED */
> > >  	struct ida		worker_ida;	/* L: for worker IDs */
> > >  
> > > +	struct workqueue_attrs	*attrs;		/* I: worker attributes */
> > 
> > If attrs always exists, why not just embed the struct and avoid the
> > need to alloc/free it?
> 
> Because then it'll need a separate init paths for embedded ones.  If
> the field was in any way hot, I'd have embedded it but it isn't and
> it's just less code to share the alloc path.

Ooh, right, and that cpumask_t is going away and you can't statically
allocate cpumask_var_t, so it needs an allocation and error check from
it anyway.

-- 
tejun
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