linux-kernel - Re: [PATCH] iommu/vt-d: add NUMA awareness to intel_alloc

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Date:   Wed, 1 Apr 2020 23:56:27 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        Christoph Hellwig <hch@...radead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Benjamin Serebrin <serebrin@...gle.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Joerg Roedel <joro@...tes.org>,
        iommu@...ts.linux-foundation.org, netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] iommu/vt-d: add NUMA awareness to intel_alloc_coherent()

On Wed, Apr 01, 2020 at 03:53:38PM -0700, Eric Dumazet wrote:
> 
> 
> On 2/2/18 10:59 AM, Eric Dumazet wrote:
> > On Fri, Feb 2, 2018 at 10:53 AM, Christoph Hellwig <hch@...radead.org> wrote:
> >> I've got patches pending to replace all that code with
> >> dma_direct_alloc, which will do the right thing.  They were
> >> submitted for 4.16, and I will resend them after -rc1.
> > 
> > I see, thanks Christoph !
> > 
> 
> Hi Christoph 
> 
> It seems 4.16 has shipped ( :) ) , and intel_alloc_coherent() still has no NUMA awareness.

Actually, that code went in and then got reverted again..

> Should I respin https://lore.kernel.org/patchwork/patch/884326/

Maybe.  We are still hoping to convert intel-iommu to the dma-iommu
framework, but I'm not sure how long that is going to take, so maybe
just respin it for now.