From: David Miller <davem@davemloft.net>
To: claudiu.manoil@freescale.com
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH][net-next] gianfar: Simplify MQ polling to avoid soft lockup
Date: Fri, 18 Oct 2013 15:55:09 -0400 (EDT) [thread overview]
Message-ID: <20131018.155509.1014087515327657926.davem@davemloft.net> (raw)
In-Reply-To: <1381759509-26882-1-git-send-email-claudiu.manoil@freescale.com>
From: Claudiu Manoil <claudiu.manoil@freescale.com>
Date: Mon, 14 Oct 2013 17:05:09 +0300
> Under certain low traffic conditions, the single core
> devices with multiple Rx/Tx queues (MQ mode) may reach
> soft lockup due to gfar_poll not returning in proper time.
> The following exception was obtained using iperf on a 100Mbit
> half-duplex link, for a p1010 single core device:
...
> To prevent this, the outer while() loop has been removed
> allowing gfar_poll() to return faster even if there's
> still budget left. Also, there's no need to recompute
> the budget per Rx queue anymore.
>
> Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Applied, thanks.
prev parent reply other threads:[~2013-10-18 19:55 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-14 14:05 [PATCH][net-next] gianfar: Simplify MQ polling to avoid soft lockup Claudiu Manoil
2013-10-14 14:34 ` Eric Dumazet
2013-10-14 15:11 ` Claudiu Manoil
2014-03-27 12:53 ` Sebastian Andrzej Siewior
2014-03-28 8:19 ` Claudiu Manoil
2014-03-28 8:34 ` Sebastian Andrzej Siewior
2014-03-28 9:46 ` Claudiu Manoil
2013-10-18 19:55 ` David Miller [this message]
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