linux-kernel - Re: [PATCH net 1/1] hv_netvsc: Calculate correct ring size when PAGE

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Date: Wed, 24 Jan 2024 01:30:30 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Michael Kelley <mhkelley58@...il.com>
Cc: haiyangz@...rosoft.com, wei.liu@...nel.org, decui@...rosoft.com,
 davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
 linux-kernel@...r.kernel.org, linux-hyperv@...r.kernel.org,
 netdev@...r.kernel.org
Subject: Re: [PATCH net 1/1] hv_netvsc: Calculate correct ring size when PAGE_SIZE
 is not 4 Kbytes

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Mon, 22 Jan 2024 08:20:28 -0800 you wrote:
> From: Michael Kelley <mhklinux@...look.com>
> 
> Current code in netvsc_drv_init() incorrectly assumes that PAGE_SIZE
> is 4 Kbytes, which is wrong on ARM64 with 16K or 64K page size. As a
> result, the default VMBus ring buffer size on ARM64 with 64K page size
> is 8 Mbytes instead of the expected 512 Kbytes. While this doesn't break
> anything, a typical VM with 8 vCPUs and 8 netvsc channels wastes 120
> Mbytes (8 channels * 2 ring buffers/channel * 7.5 Mbytes/ring buffer).
> 
> [...]

Here is the summary with links:
  - [net,1/1] hv_netvsc: Calculate correct ring size when PAGE_SIZE is not 4 Kbytes
    https://git.kernel.org/netdev/net/c/6941f67ad37d

You are awesome, thank you!
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