linux-kernel - Re: [Xen-devel] [PATCH] xen: Add __GFP_DMA flag when xen_swiotlb

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Message-ID: <20150423023308.GB7783@cbz-thinkpad>
Date:	Thu, 23 Apr 2015 10:33:08 +0800
From:	Chen Baozi <cbz@...zis.org>
To:	Stefano Stabellini <stefano.stabellini@...citrix.com>
Cc:	Ian Campbell <Ian.Campbell@...rix.com>,
	David Vrabel <david.vrabel@...rix.com>,
	xen-devel@...ts.xen.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Roger Pau Monne <roger.pau@...rix.com>
Subject: Re: [Xen-devel] [PATCH] xen: Add __GFP_DMA flag when
 xen_swiotlb_init gets free pages.

On Tue, Apr 21, 2015 at 12:11:01PM +0100, Stefano Stabellini wrote:
> Chen,
> could you please try the patch below in your repro scenario?
> I have only build tested it.
> 
> ---
> 
> xen: Add __GFP_DMA flag when xen_swiotlb_init gets free pages on ARM
> 
> From: Chen Baozi <baozich@...il.com>
> 
> Make sure that xen_swiotlb_init allocates buffers that are DMA capable
> when at least one memblock is available below 4G. Otherwise we assume
> that all devices on the SoC can cope with >4G addresses.
> 
> No functional changes on x86.
> 
> Signed-off-by: Chen Baozi <baozich@...il.com>
> Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com>

Tested-by: Chen Baozi <baozich@...il.com>

Cheers,

Baozi
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