netdev - Re: [PATCH net] netvsc: increase default receive buffer size

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Message-Id: <20170914.100203.1656028222884493229.davem@davemloft.net>
Date:   Thu, 14 Sep 2017 10:02:03 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     stephen@...workplumber.org
Cc:     kys@...rosoft.com, haiyangz@...rosoft.com, netdev@...r.kernel.org,
        devel@...uxdriverproject.org, sthemmin@...rosoft.com
Subject: Re: [PATCH net] netvsc: increase default receive buffer size

From: Stephen Hemminger <stephen@...workplumber.org>
Date: Thu, 14 Sep 2017 09:31:07 -0700

> The default receive buffer size was reduced by recent change
> to a value which was appropriate for 10G and Windows Server 2016.
> But the value is too small for full performance with 40G on Azure.
> Increase the default back to maximum supported by host.
> 
> Fixes: 8b5327975ae1 ("netvsc: allow controlling send/recv buffer size")
> Signed-off-by: Stephen Hemminger <sthemmin@...rosoft.com>

What other side effects are there to making this buffer so large?

Just curious...