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From: David Daney <david.daney@cavium.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Grant Likely <grant.likely@secretlab.ca>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Greg Kroah-Hartman <greg@kroah.com>, Dilan Lee <dilee@nvidia.com>,
	Mark Brown <broonie@opensource.wolfsonmicro.com>,
	Manjunath GKondaiah <manjunath.gkondaiah@linaro.org>,
	Arnd Bergmann <arnd@arndb.de>
Subject: Re: [RFC PATCH v3] drivercore: Add driver probe deferral mechanism
Date: Thu, 22 Sep 2011 14:19:29 -0700	[thread overview]
Message-ID: <4E7BA661.7070903@cavium.com> (raw)
In-Reply-To: <20110922212909.49966cf4@lxorguk.ukuu.org.uk>

On 09/22/2011 01:29 PM, Alan Cox wrote:
> Definitely what is needed for some of the x86 SoC stuff and would let us
> rip out some of the special case magic for the SCU discovery.
>
> First thing that strikes me is driver_bound kicks the processing queue
> again. That seems odd - surely this isn't needed because any driver that
> does initialise this time and may allow something else to get going will
> queue the kick itself. Thus this seems to just add overhead.
>

Do you mean explicitly kick the queue?

How would a given driver know that something else is waiting for it?  Or 
would we add the explicit kick to each and every driver in the tree?


> It all looks a bit O(N²) if we don't expect the drivers that might
> trigger something else binding to just say 'hey I'm one of the
> troublemakers'

I think it probably is O(N²), but N is small...



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  parent reply	other threads:[~2011-09-22 21:19 UTC|newest]

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-09-22 18:51 [RFC PATCH v3] drivercore: Add driver probe deferral mechanism Grant Likely
2011-09-22 18:51 ` Grant Likely
2011-09-22 18:58 ` Joe Perches
2011-09-22 18:58   ` Joe Perches
2011-09-22 19:28 ` David Daney
2011-09-22 20:29 ` Alan Cox
2011-09-22 20:29   ` Alan Cox
2011-09-22 21:19   ` Grant Likely
2011-09-22 21:19     ` Grant Likely
2011-09-23 17:50     ` Valdis.Kletnieks
2011-09-23 17:50       ` Valdis.Kletnieks at vt.edu
2011-09-23 23:18       ` Grant Likely
2011-09-23 23:18         ` Grant Likely
2011-09-22 21:19   ` David Daney [this message]
2011-09-22 22:47     ` Alan Cox
2011-09-22 22:47       ` Alan Cox
2011-09-23  5:02       ` Grant Likely
2011-09-23  5:02         ` Grant Likely
2011-09-23 16:55       ` David Daney
2011-09-23 16:55         ` David Daney
2011-09-26 14:16 ` Mark Brown
2011-09-26 14:16   ` Mark Brown
2011-09-26 15:12   ` Russell King - ARM Linux
2011-09-26 15:12     ` Russell King - ARM Linux
2011-09-26 15:26     ` Mark Brown
2011-09-26 15:26       ` Mark Brown
2011-09-26 15:48       ` Grant Likely
2011-09-26 15:48         ` Grant Likely
2011-09-27 13:50         ` Arnd Bergmann
2011-09-27 13:50           ` Arnd Bergmann
2011-09-27 21:08           ` Grant Likely
2011-09-27 21:08             ` Grant Likely
2011-09-27 22:13             ` Mark Brown
2011-09-27 22:13               ` Mark Brown
2011-09-28 13:04               ` Arnd Bergmann
2011-09-28 13:04                 ` Arnd Bergmann
2011-09-28 13:20                 ` Mark Brown
2011-09-28 13:20                   ` Mark Brown
2011-09-28 23:14               ` Grant Likely
2011-09-28 23:14                 ` Grant Likely
2011-09-29 11:00                 ` Mark Brown
2011-09-29 11:00                   ` Mark Brown
2011-10-03 23:02 ` Kevin Hilman
2011-10-03 23:02   ` Kevin Hilman
2011-10-04 15:52   ` Grant Likely
2011-10-04 15:52     ` Grant Likely
2011-10-04 14:51 ` G, Manjunath Kondaiah
2011-10-04 14:51   ` G, Manjunath Kondaiah
2011-10-04 14:51   ` G, Manjunath Kondaiah
2011-10-04 15:58   ` Grant Likely
2011-10-04 15:58     ` Grant Likely
2011-10-04 15:58     ` Grant Likely
2011-10-04 18:35     ` G, Manjunath Kondaiah
2011-10-04 18:35       ` G, Manjunath Kondaiah
2011-10-04 23:35       ` Grant Likely
2011-10-04 23:35         ` Grant Likely
2011-10-07  3:31         ` G, Manjunath Kondaiah
2011-10-07  3:31           ` G, Manjunath Kondaiah
2011-10-11 20:47 ` Andrew Morton
2011-10-11 20:47   ` Andrew Morton
2011-10-11 21:07   ` David Daney
2011-10-13  4:19     ` Grant Likely
2011-10-13  4:19       ` Grant Likely

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