linux-kernel - Re: [PATCH 3/3] misc: use a proper range for minor number dynamic allocation

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Date:	Tue, 15 Dec 2009 15:41:14 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Thadeu Lima de Souza Cascardo <cascardo@...oscopio.com>,
	linux-kernel@...r.kernel.org, rubini@...dd.com, gregkh@...e.de
Subject: Re: [PATCH 3/3] misc: use a proper range for minor number dynamic
 allocation

On Tue, 15 Dec 2009 23:37:38 +0000
Alan Cox <alan@...rguk.ukuu.org.uk> wrote:

> > > I merged this patch, but made a note-to-self that there are remaining
> > > open issues..
> > 
> > And nothing else happened.  Can we revisit this please?
> 
> The last I saw was a request for an explanation of the users
> configuration and how he was getting so many misc devices. Its a bug in
> dlm if the dlm is doing that but I didn't see any follow up to the DLM
> folks on the subject from the reporter, so it stays NACKed and conflicts
> with the device registry.
> 
> We need to know from the DLM folks/Thaddeu what is actually going on with
> that system, especially as it seems to be producing multiple
> registrations of the same misc device name which is completely broken and
> should probably be made to error anyway.
> 
> Whatever is going on this is the wrong "fix". If DLM should only register
> it once (as seems the intent) then DLM needs fixing or the users config
> or both. If it can register many then DLM needs fixing to not eat misc
> devices.
> 
> <eviltwin>Possibly we need to make it BUG_ON() adding the same name twice, then
> perhaps we'd get more feedback</eviltwin>
> 

OK, thanks, I dropped it.  We can always reappyly it (or a variant)
once this is all sorted out.

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