linux-kernel - Re: [PATCH net-next] hyperv: Increase the buffer length for netvsc_channel

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Message-Id: <20140805.130346.2080401893280146356.davem@davemloft.net>
Date:	Tue, 05 Aug 2014 13:03:46 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	thomas1206@...il.com
Cc:	netdev@...r.kernel.org, haiyangz@...rosoft.com, kys@...rosoft.com,
	olaf@...fle.de, jasowang@...hat.com, linux-kernel@...r.kernel.org,
	driverdev-devel@...uxdriverproject.org
Subject: Re: [PATCH net-next] hyperv: Increase the buffer length for
 netvsc_channel_cb()

From: Haiyang Zhang <thomas1206@...il.com>
Date: Fri,  1 Aug 2014 15:55:30 +0000

> When the buffer is too small for a packet from VMBus, a bigger buffer will be
> allocated in netvsc_channel_cb() and retry reading the packet from VMBus.
> Increasing this buffer size will reduce the retry overhead.
> 
> Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
> Reviewed-by: Dexuan Cui <decui@...rosoft.com>

I'm not applying this, sorry.

I said that because the structure that contains this buffer is now
larger than a page, you should allocate the CB buffer externally
via another kmalloc() or via the page allocator.
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