linux-kernel - Re: [PATCH kernel v9 09/32] vfio: powerpc/spapr: Rework groups attaching

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Message-ID: <20150430040525.GA15238@voom.redhat.com>
Date:	Thu, 30 Apr 2015 14:05:25 +1000
From:	David Gibson <david@...son.dropbear.id.au>
To:	Alexey Kardashevskiy <aik@...abs.ru>
Cc:	linuxppc-dev@...ts.ozlabs.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Alex Williamson <alex.williamson@...hat.com>,
	Gavin Shan <gwshan@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH kernel v9 09/32] vfio: powerpc/spapr: Rework groups
 attaching

On Thu, Apr 30, 2015 at 12:29:30PM +1000, Alexey Kardashevskiy wrote:
> On 04/29/2015 12:16 PM, David Gibson wrote:
> >On Sat, Apr 25, 2015 at 10:14:33PM +1000, Alexey Kardashevskiy wrote:
> >>This is to make extended ownership and multiple groups support patches
> >>simpler for review.
> >>
> >>This should cause no behavioural change.
> >
> >Um.. this doesn't appear to be true.  Previously removing a group from
> >an enabled container would fail with EBUSY, now it forces a disable.
> 
> 
> This is the original tce_iommu_detach_group() where I cannot find EBUSY you
> are referring to; it did and does enforce disable. What do I miss
> here?

Sorry, my mistake.  I misread the patch.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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