linux-kernel - Re: Race free attributes in sysfs

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Message-ID: <20070523151426.GB26046@kroah.com>
Date:	Wed, 23 May 2007 08:14:26 -0700
From:	Greg KH <greg@...ah.com>
To:	Mark Lord <lkml@....ca>
Cc:	Dmitry Torokhov <dtor@...ightbb.com>,
	Pierre Ossman <drzeus-list@...eus.cx>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Race free attributes in sysfs

On Wed, May 23, 2007 at 09:27:12AM -0400, Mark Lord wrote:
>  Greg KH wrote:
> > And yes, it only starts to look for things when it recieves an event, it
> > does not "scan" sysfs at all.
> 
>  Does it "look for" only that one event, or does it "scan" at that point?

udev will act on that event, and as I mentioned, not read anything from
sysfs at all, unless a custom rule is in the rules file asking it to
read a specific sysfs file in the tree.

So no "scanning" happens unless specificically asked for.

And as mentioned, udev can work just fine without sysfs enabled at all
now, with the exception of some custom rules for some devices.

thanks,

greg k-h
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