linux-kernel - Re: [PATCH net-next 0/2] xen-netback: Changes around carrier handling

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Message-ID: <53DFA7FE.3000507@citrix.com>
Date:	Mon, 4 Aug 2014 16:34:22 +0100
From:	Zoltan Kiss <zoltan.kiss@...rix.com>
To:	Wei Liu <wei.liu2@...rix.com>,
	Ian Campbell <Ian.Campbell@...rix.com>
CC:	David Vrabel <david.vrabel@...rix.com>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <xen-devel@...ts.xenproject.org>
Subject: Re: [PATCH net-next 0/2] xen-netback: Changes around carrier handling

On 04/08/14 16:20, Zoltan Kiss wrote:
> This series starts using carrier off as a way to purge packets when the guest is
> not able (or willing) to receive them. It is a much faster way to get rid of
> packets waiting for an overwhelmed guest.
> The first patch changes current netback code where it relies currently on
> netif_carrier_ok.
> The second turns off the carrier if the guest times out on a queue, and only
> turn it on again if that queue (or queues) resurrects.
>
> Signed-off-by: Zoltan Kiss <zoltan.kiss@...rix.com>
> Signed-off-by: David Vrabel <david.vrabel@...rix.com>
> Cc: netdev@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Cc: xen-devel@...ts.xenproject.org
>

Sorry, I forgot to include v2 in the subject header, and the version 
history for the second patch:

v2:
- added a lot more comments
- fixing the bit checking in RX interrupt
- move out the bulk of the code from the main thread function into
   xenvif_rx_purge_event

Zoli
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