linux-kernel - Re: [PATCH] arm64: fix MAX

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Message-ID: <alpine.DEB.2.02.1406111604060.27885@chino.kir.corp.google.com>
Date:	Wed, 11 Jun 2014 16:04:29 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Mark Salter <msalter@...hat.com>,
	Michal Nazarewicz <mina86@...a86.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>
cc:	Catalin Marinas <catalin.marinas@....com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: fix MAX_ORDER for 64K pagesize

On Wed, 11 Jun 2014, David Rientjes wrote:

> Any reason to not switch this to
> 
> 	ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE && CMA
> 

(ARM64_64K_PAGES) && (TRANSPARENT_HUGEPAGE || CMA)

> instead?  If pageblock_order > MAX_ORDER because of 
> HPAGE_SHIFT > PAGE_SHIFT, then cma is always going to be passing a 
> too-large-order to free_pages_prepare() via this path.
> 
> Adding Michal and Marek to the cc.
> 
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