netdev - Re: [PATCH net-next v10 0/4] GVE Raw Addressing

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Date:   Tue, 08 Dec 2020 16:13:24 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     awogbemila@...gle.com
Cc:     netdev@...r.kernel.org, alexander.duyck@...il.com,
        saeed@...nel.org, alexanderduyck@...com
Subject: Re: [PATCH net-next v10 0/4] GVE Raw Addressing

From: David Awogbemila <awogbemila@...gle.com>
Date: Mon,  7 Dec 2020 14:45:22 -0800

> Patchset description:
> This  patchset introduces "raw addressing" mode to the GVE driver.
> Previously (in "queue_page_list" or "qpl" mode), the driver would
> pre-allocate and dma_map buffers to be used on egress and ingress.
> On egress, it would copy data from the skb provided to the
> pre-allocated buffers - this was expensive.
> In raw addressing mode, the driver can avoid this copy and simply
> dma_map the skb's data so that the NIC can use it.
> On ingress, the driver passes buffers up to the networking stack and
> then frees and reallocates buffers when necessary instead of using
> skb_copy_to_linear_data.
> Patch 3 separates the page refcount tracking mechanism
> into a function gve_rx_can_recycle_buffer which uses get_page - this will
> be changed in a future patch to eliminate the use of get_page in tracking
> page refcounts.
> 
> Changes from v9:
>   Patch 4: Use u64, not u32 for new tx stat counters.

Series applied, thanks.