linux-kernel - Re: [PATCH 2/8] Mark powerpc memory resources as busy

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Date:	Mon, 5 Aug 2013 13:11:12 +1000
From:	Michael Ellerman <michael@...erman.id.au>
To:	Nathan Fontenot <nfont@...ux.vnet.ibm.com>
Cc:	linux-mm <linux-mm@...ck.org>, isimatu.yasuaki@...fujitsu.com,
	linuxppc-dev@...ts.ozlabs.org, LKML <linux-kernel@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH 2/8] Mark powerpc memory resources as busy

On Fri, Aug 02, 2013 at 02:05:57PM -0500, Nathan Fontenot wrote:
> On 08/01/2013 09:28 PM, Michael Ellerman wrote:
> > On Wed, Jul 24, 2013 at 01:36:34PM -0500, Nathan Fontenot wrote:
> >> Memory I/O resources need to be marked as busy or else we cannot remove
> >> them when doing memory hot remove.
> > 
> > I would have thought it was the opposite?
> 
> Me too.
> 
> As it turns out the code in kernel/resource.c checks to make sure the
> IORESOURCE_BUSY flag is set when trying to release a resource.

OK, I guess there's probably some sane reason, but it does seem
backward.

cheers
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