netdev - Re: [PATCH net-next 4/7] net/mlx4_en: Set carrier to off when a port is stopped

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Message-ID: <50F7A268.1090708@mellanox.com>
Date:	Thu, 17 Jan 2013 09:04:08 +0200
From:	Amir Vadai <amirv@...lanox.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
CC:	"David S. Miller" <davem@...emloft.net>, <netdev@...r.kernel.org>,
	"Or Gerlitz" <ogerlitz@...lanox.com>,
	Eugenia Emantayev <eugenia@...lanox.com>
Subject: Re: [PATCH net-next 4/7] net/mlx4_en: Set carrier to off when a port
 is stopped

On 16/01/2013 18:00, Ben Hutchings wrote:
> On Wed, 2013-01-16 at 17:42 +0200, Amir Vadai wrote:
>> >From: Eugenia Emantayev<eugenia@...lanox.com>
>> >
>> >Under heavy CPU load changing ring size/mtu/etc. could result in transmit
>> >timeout, since stop-start port might take more than 10 sec. Set
>> >netif_carrier_off to prevent tx queue transmit timeout.
> A spurious link change can restart L3 auto-configuration (DHCP, SLAAC,
> etc.)  netif_device_detach() also inhibits the watchdog and doesn't have
> that problem.
>
> Ben.
>

Thanks, Ben.

I will change it to netif_device_attach().
Since this will need some testing, will resend the patchset without this 
patch for now.

Amir.
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