Date: Thu, 12 Jun 2003 15:03:35 -0700
From: Andrew Morton <akpm@digeo.com>
To: Greg KH <greg@kroah.com>
Cc: sdake@mvista.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] udev enhancements to use kernel event queue
Message-Id: <20030612150335.6710a94f.akpm@digeo.com>
In-Reply-To: <20030612214753.GA1087@kroah.com>
References: <3EE8D038.7090600@mvista.com>
	<20030612214753.GA1087@kroah.com>
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Greg KH <greg@kroah.com> wrote:
>
> > 3) /sbin/hotplug events can occur out of order, eg: remove event occurs, 
> > /sbin/hotplug sleeps waiting for something, insert event occurs and 
> > completes immediately.  Then the remove event completes, after the 
> > insert, resulting in out-of-order completion and a broken /dev.  I have 
> > seen this several times with udev.
> 
> I responded:
> 	Yes this happens.  I have a fix for this for udev itself.  No
> 	kernel changes are needed.  I'll show it at OLS in July if you
> 	want to see it :)

This is a significantly crappy aspect of the /sbin/hotplug callout.  I'd be
very interested in reading an outline of how you propose fixing it, without
waiting until OLS, thanks.

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