Subject: Re: [PATCH V1 net-next 00/12] Improving performance and reducing latencies, by using latest capabilities exposed in ENA device

From: "Bshara, Saeed" <[email-masked]>
Date: Tue, 9 Oct 2018 21:18:30 +0000

Jesper,
currently the driver allocate page per rx buffer, but we are considering to support mode where page split to 2 buffers in order to overcome memory fragmentation issue on low memory systems. but, this won't work with XDP, right?
what's your advice?

From: Bshara, Nafea
Sent: Tuesday, October 9, 2018 10:33 PM
To: Jesper Dangaard Brouer; Kiyanovski, Arthur
Cc: [email-masked]; [email-masked]; Woodhouse, David; Machulsky, Zorik; Matushevsky, Alexander; Bshara, Saeed; Wilson, Matt; Liguori, Anthony; Tzalik, Guy; Belgazal, Netanel; Saidi, Ali; Björn Töpel
Subject: Re: [PATCH V1 net-next 00/12] Improving performance and reducing latencies, by using latest capabilities exposed in ENA device
    
It is high priority for us right after this major release get merged.

On 10/9/18, 12:31 PM, "Jesper Dangaard Brouer" <[email-masked]> wrote:

    On Tue, 9 Oct 2018 21:44:57 +0300 <[email-masked]> wrote:
    
    > From: Arthur Kiyanovski <[email-masked]>
    > 
    > This patchset introduces the following:
    > 1. A new placement policy of Tx headers and descriptors, which takes
    > advantage of an option to place headers + descriptors in device memory
    > space. This is sometimes referred to as LLQ - low latency queue.
    > The patch set defines the admin capability, maps the device memory as
    > write-combined, and adds a mode in transmit datapath to do header +
    > descriptor placement on the device.
    > 2. Support for RX checksum offloading
    > 3. Miscelaneous small improvements and code cleanups
    
    What are your plans for XDP?
    
    You are unsure ask your-colleague David Woodhouse, who I've discussed
    this with when he attended my talk at Kernel-Recipes[1], slide[2].
    
    [1]  https://kernel-recipes.org/en/2018/talks/xdp-a-new-programmable-network-layer/
    [2]  http://people.netfilter.org/hawk/presentations/KernelRecipes2018/XDP_Kernel_Recipes_2018.pdf
    -- 
    Best regards,
      Jesper Dangaard Brouer
      MSc.CS, Principal Kernel Engineer at Red Hat
      LinkedIn: http://www.linkedin.com/in/brouer