linux-kernel - Re: [PATCH 08/13] swiotlb-xen: always use dma-direct helpers to alloc coherent pages

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Message-ID: <20190904070033.GA11643@lst.de>
Date:   Wed, 4 Sep 2019 09:00:33 +0200
From:   Christoph Hellwig <hch@....de>
To:     Boris Ostrovsky <boris.ostrovsky@...cle.com>
Cc:     Christoph Hellwig <hch@....de>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Juergen Gross <jgross@...e.com>, x86@...nel.org,
        linux-arm-kernel@...ts.infradead.org,
        xen-devel@...ts.xenproject.org, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/13] swiotlb-xen: always use dma-direct helpers to
 alloc coherent pages

On Tue, Sep 03, 2019 at 06:25:54PM -0400, Boris Ostrovsky wrote:
> > If I am reading __dma_direct_alloc_pages() correctly there is a path
> > that will force us to use GFP_DMA32 and as Juergen pointed out in
> > another message that may not be desirable.

Yes, it will add GFP_DMA32.  So I guess for now we'll just keep the
direct page allocator calls and resend.  I don't think this is the
right thing to do long term, but I'd really like to get this series
finished.