linux-kernel - Re: [patch] drivers: wait for threaded probes between initcall levels

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Message-ID: <20061030191307.GE10235@parisc-linux.org>
Date:	Mon, 30 Oct 2006 12:13:07 -0700
From:	Matthew Wilcox <matthew@....cx>
To:	Kyle Moffett <mrmacman_g4@....com>
Cc:	Linus Torvalds <torvalds@...l.org>,
	"Adam J. Richter" <adam@...drasil.com>, akpm@...l.org,
	bunk@...sta.de, greg@...ah.com, linux-kernel@...r.kernel.org,
	linux-pci@...ey.karlin.mff.cuni.cz, pavel@....cz,
	shemminger@...l.org
Subject: Re: [patch] drivers: wait for threaded probes between initcall levels

On Mon, Oct 30, 2006 at 01:47:53PM -0500, Kyle Moffett wrote:
> Well, yes, but it would help some architectures.  It would seem  
> rather stupid to build a hardware limitation into a 64+ cpu system  
> such that it cannot initialize or reconfigure multiple pieces of  
> hardware at once.  It also would help for more "mundane" systems such  
> as my "Quad" G5 desktop which takes an appreciable time to probe all  
> the various PCI, USB, SATA, and  Firewire devices in the system.

Probing PCI devices really doesn't take that long.  It's the extra stuff
the drivers do at ->probe that takes the time.  And the stand-out
offender here is SCSI (and FC), which I'm working to fix.  Firewire, USB
and SATA are somewhere intermediate.
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