netdev - Re: [PATCH v1 5/5] driver-core: add driver asynchronous probe support

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Message-ID: <20141003211211.GX14081@wotan.suse.de>
Date:	Fri, 3 Oct 2014 23:12:11 +0200
From:	"Luis R. Rodriguez" <mcgrof@...e.com>
To:	"Luis R. Rodriguez" <mcgrof@...not-panic.com>
Cc:	gregkh@...uxfoundation.org, dmitry.torokhov@...il.com,
	tiwai@...e.de, tj@...nel.org, arjan@...ux.intel.com, teg@...m.no,
	rmilasan@...e.com, werner@...e.com, oleg@...hat.com, hare@...e.com,
	bpoirier@...e.de, santosh@...lsio.com, pmladek@...e.cz,
	dbueso@...e.com, linux-kernel@...r.kernel.org,
	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	Joseph Salisbury <joseph.salisbury@...onical.com>,
	Kay Sievers <kay@...y.org>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Tim Gardner <tim.gardner@...onical.com>,
	Pierre Fersing <pierre-fersing@...rref.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nagalakshmi Nandigama <nagalakshmi.nandigama@...gotech.com>,
	Praveen Krishnamoorthy <praveen.krishnamoorthy@...gotech.com>,
	Sreekanth Reddy <sreekanth.reddy@...gotech.com>,
	Abhijit Mahajan <abhijit.mahajan@...gotech.com>,
	Casey Leedom <leedom@...lsio.com>,
	Hariprasad S <hariprasad@...lsio.com>,
	MPT-FusionLinux.pdl@...gotech.com, linux-scsi@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH v1 5/5] driver-core: add driver asynchronous probe
	support

On Fri, Oct 03, 2014 at 10:11:26PM +0200, Luis R. Rodriguez wrote:
> On Fri, Sep 26, 2014 at 02:57:17PM -0700, Luis R. Rodriguez wrote:
> > +	queue_work(system_unbound_wq, &priv->attach_work->work);
> 
> Tejun,
> 
> based on my testing so far using system_highpri_wq instead of
> system_unbound_wq yields close to par / better boot times
> than synchronous probe support for all modules. How set are
> you on using system_unbound_wq? About to punt out a new
> series which also addresses built-in.

Nevermind, folks can change this later with better empirical
testing than I can provide and right now the differences I
see are not too conclusive and I suspect we'll see more of
a difference once the right built-in drivers are selected
to probe asynchrounously.

  Luis
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