linux-kernel - Re: [RFC v1 0/3] driver-core: add asynch module loading support

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Message-ID: <20140831175243.GB17827@core.coreip.homeip.net>
Date:	Sun, 31 Aug 2014 10:52:43 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	"Luis R. Rodriguez" <mcgrof@...not-panic.com>,
	gregkh@...uxfoundation.org, falcon@...zu.com, tiwai@...e.de,
	arjan@...ux.intel.com, linux-kernel@...r.kernel.org,
	oleg@...hat.com, akpm@...ux-foundation.org,
	penguin-kernel@...ove.sakura.ne.jp, joseph.salisbury@...onical.com,
	bpoirier@...e.de, "Luis R. Rodriguez" <mcgrof@...e.com>
Subject: Re: [RFC v1 0/3] driver-core: add asynch module loading support

On Sun, Aug 31, 2014 at 07:05:26AM -0400, Tejun Heo wrote:
> On Sun, Aug 31, 2014 at 07:02:00AM -0400, Tejun Heo wrote:
> > So, something like the following.  A couple things to note
> > 
> > * driver_attach() can never fail but is marked with __must_check.  We
> >   prolly should change it to void.
> > 
> > * Old/weird userspace which depends on insmod to wait for device
> >   probing might choke and the new behavior might need to be switched
> >   somehow (sysctl, insmod param or whatever).
> 
> One more thing.
> 
> * Use of ordered workqueue probably isn't necessary and using
>   system_unbound_wq should be fine.
> 

For my use case (touchpad taking long time to initialize) I explicitly do not
want it to keep order of initialization. I want to make sure the rest of the
kernel continues initialization while touchpad device resets.

Thanks.

-- 
Dmitry
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