netdev - RE: [PATCH net-next] hyperv: Increase the buffer length for netvsc_channel

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Date:	Mon, 4 Aug 2014 22:34:55 +0000
From:	Haiyang Zhang <haiyangz@...rosoft.com>
To:	David Miller <davem@...emloft.net>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	KY Srinivasan <kys@...rosoft.com>,
	"olaf@...fle.de" <olaf@...fle.de>,
	"jasowang@...hat.com" <jasowang@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"driverdev-devel@...uxdriverproject.org" 
	<driverdev-devel@...uxdriverproject.org>
Subject: RE: [PATCH net-next] hyperv: Increase the buffer length for
 netvsc_channel_cb()



> -----Original Message-----
> From: David Miller [mailto:davem@...emloft.net]
> Sent: Monday, August 4, 2014 6:09 PM
> To: Haiyang Zhang
> Cc: netdev@...r.kernel.org; KY Srinivasan; 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 <haiyangz@...rosoft.com>
> Date: Mon,  4 Aug 2014 12:33:45 -0700
> 
> > 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>
> 
> Now netvsc_device is significantly larger than a page, you should probably
> therefore allocate netvsc_device->cb_buffer indirectly instead of inlining it into
> the structure.

I will make this update.
Thanks,
- Haiyang

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