linux-kernel - Re: add an API to check if a streamming mapping needs sync calls

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Message-ID: <ce7dc444-534e-636b-81d8-dbad249ad6aa@iogearbox.net>
Date:   Wed, 8 Jul 2020 11:01:35 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Christoph Hellwig <hch@....de>,
        Björn Töpel <bjorn.topel@...el.com>
Cc:     Magnus Karlsson <magnus.karlsson@...el.com>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        iommu@...ts.linux-foundation.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: add an API to check if a streamming mapping needs sync calls

On 7/8/20 9:44 AM, Christoph Hellwig wrote:
> On Mon, Jun 29, 2020 at 03:39:01PM +0200, Björn Töpel wrote:
>> On 2020-06-29 15:03, Christoph Hellwig wrote:
>>> Hi all,
>>>
>>> this series lifts the somewhat hacky checks in the XSK code if a DMA
>>> streaming mapping needs dma_sync_single_for_{device,cpu} calls to the
>>> DMA API.
>>>
>>
>> Thanks a lot for working on, and fixing this, Christoph!
>>
>> I took the series for a spin, and there are (obviously) no performance
>> regressions.
>>
>> Would the patches go through the net/bpf trees or somewhere else?
> 
> Where did this end up?  I still don't see it in Linus' tree and this
> is getting urgent now.

It was merged into bpf tree and we sent the PR to DaveM which was merged into
net tree around a week ago [0]; I assume the PR for net might go to Linus soon
this week.

   [0] https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=e708e2bd55c921f5bb554fa5837d132a878951cf