linux-kernel - Re: [PATCH kernel] powerpc/powernv/ioda2: Fix calculation for memory allocated for TCE table

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Message-ID: <20150721051128.GL19189@voom.fritz.box>
Date:	Tue, 21 Jul 2015 15:11:28 +1000
From:	David Gibson <david@...son.dropbear.id.au>
To:	Alexey Kardashevskiy <aik@...abs.ru>
Cc:	linuxppc-dev@...ts.ozlabs.org,
	Michael Ellerman <mpe@...erman.id.au>,
	Paul Mackerras <paulus@...ba.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH kernel] powerpc/powernv/ioda2: Fix calculation for memory
 allocated for TCE table

On Mon, Jul 20, 2015 at 08:45:51PM +1000, Alexey Kardashevskiy wrote:
> The existing code stores the amount of memory allocated for a TCE table.
> At the moment it uses @offset which is a virtual offset in the TCE table
> which is only correct for a one level tables and it does not include
> memory allocated for intermediate levels. When multilevel TCE table is
> requested, WARN_ON in tce_iommu_create_table() prints a warning.
> 
> This adds an additional counter to pnv_pci_ioda2_table_do_alloc_pages()
> to count actually allocated memory.
> 
> Signed-off-by: Alexey Kardashevskiy <aik@...abs.ru>

Reviewed-by: David Gibson <david@...son.dropbear.id.au>

-- 
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