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Date:   Thu, 6 Dec 2018 18:40:27 +0100
From:   Jesper Dangaard Brouer <brouer@redhat.com>
To:     Christoph Hellwig <hch@lst.de>
Cc:     iommu@lists.linux-foundation.org,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Tariq Toukan <tariqt@mellanox.com>,
        Ilias Apalodimas <ilias.apalodimas@linaro.org>,
        Toke =?UTF-8?B?SMO4aWxhbmQtSsO4?= =?UTF-8?B?cmdlbnNlbg==?= 
        <toke@toke.dk>, Robin Murphy <robin.murphy@arm.com>,
        linux-kernel@vger.kernel.org, brouer@redhat.com
Subject: Re: [PATCH] dma-mapping: bypass indirect calls for dma-direct
Message-ID: <20181206184027.291947c3@redhat.com>
In-Reply-To: <20181206153720.10702-2-hch@lst.de>
References: <20181206153720.10702-1-hch@lst.de>
        <20181206153720.10702-2-hch@lst.de>
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On Thu,  6 Dec 2018 07:37:20 -0800
Christoph Hellwig <hch@lst.de> wrote:

> Avoid expensive indirect calls in the fast path DMA mapping
> operations by directly calling the dma_direct_* ops if we are using
> the directly mapped DMA operations.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  include/linux/dma-direct.h  |  17 -----
>  include/linux/dma-mapping.h | 138 +++++++++++++++++++++++++++++++-----
>  kernel/dma/direct.c         |  13 ++--
>  3 files changed, 127 insertions(+), 41 deletions(-)

Hi Christoph,

Is this patch to be applied on top of the other (41) patches I just
tested with my XDP forward workload?

-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer