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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 Høiland-Jørgensen" <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
Date: Thu, 6 Dec 2018 18:40:27 +0100
Message-ID: <20181206184027.291947c3@redhat.com> (raw)
In-Reply-To: <20181206153720.10702-2-hch@lst.de>

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

  reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-06 15:37 [RFC] avoid indirect calls for DMA direct mappings Christoph Hellwig
2018-12-06 15:37 ` [PATCH] dma-mapping: bypass indirect calls for dma-direct Christoph Hellwig
2018-12-06 17:40   ` Jesper Dangaard Brouer [this message]
2018-12-06 18:35     ` Christoph Hellwig
2018-12-06 17:43 ` [RFC] avoid indirect calls for DMA direct mappings Jesper Dangaard Brouer
2018-12-06 18:29   ` Nadav Amit
2018-12-06 18:45     ` Christoph Hellwig
2018-12-06 18:28 ` Linus Torvalds
2018-12-06 18:30   ` Linus Torvalds
2018-12-06 18:43   ` Christoph Hellwig
2018-12-06 18:51     ` Linus Torvalds
2018-12-06 18:54     ` Robin Murphy
2018-12-06 20:00       ` Christoph Hellwig
2018-12-06 20:24         ` Robin Murphy
2018-12-07  1:21           ` Christoph Hellwig
2018-12-07 15:44             ` Jesper Dangaard Brouer
2018-12-07 16:05               ` Jesper Dangaard Brouer

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