linux-kernel - Re: [RFC V3 7/9] dcbm: add dma core batch migrator for batch page offloading

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Message-ID: <693936c8-f554-4c1a-a140-1971c3152713@amd.com>
Date: Thu, 16 Oct 2025 15:29:03 +0530
From: "Garg, Shivank" <shivankg@....com>
To: Jonathan Cameron <jonathan.cameron@...wei.com>
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Subject: Re: [RFC V3 7/9] dcbm: add dma core batch migrator for batch page
 offloading



On 10/2/2025 5:08 PM, Jonathan Cameron wrote:
> On Tue, 23 Sep 2025 17:47:42 +0000
> Shivank Garg <shivankg@....com> wrote:
> 
>> The dcbm (DMA core batch migrator) provides a generic interface using
>> DMAEngine for end-to-end testing of the batch page migration offload
>> feature.
>>
>> Enable DCBM offload:
>> echo 1 > /sys/kernel/dcbm/offloading
>> echo NR_DMA_CHAN_TO_USE > /sys/kernel/dcbm/nr_dma_chan
>>
>> Disable DCBM offload:
>> echo 0 > /sys/kernel/dcbm/offloading
>>
>> Signed-off-by: Shivank Garg <shivankg@....com>
> Hi Shivank,
> 
> Some minor comments inline.
> 
> J

Hi Jonathan,

Thank you very much for your detailed feedback and review comments.
I have incorporated your suggestions and updated commits are available
on my development branch:
https://github.com/shivankgarg98/linux/tree/shivank/V4_migrate_pages_optimization

I will hold off on posting the RFC V4 series to the mailing list until I have
new findings or other substantial changes to report.

Thanks again,
Shivank