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From: Stephen Hemminger <stephen@networkplumber.org>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David Miller <davem@davemloft.net>, netdev <netdev@vger.kernel.org>
Subject: Re: [PATCH v3 net] net: solve a NAPI race
Date: Mon, 27 Feb 2017 14:44:55 -0800	[thread overview]
Message-ID: <20170227144455.174ab1e5@xeon-e3> (raw)
In-Reply-To: <1488234917.9415.217.camel@edumazet-glaptop3.roam.corp.google.com>

On Mon, 27 Feb 2017 14:35:17 -0800
Eric Dumazet <eric.dumazet@gmail.com> wrote:

> On Mon, 2017-02-27 at 14:14 -0800, Stephen Hemminger wrote:
> 
> > The original design (as Davem mentioned) was that IRQ's must be disabled
> > during device polling. If that was true, then the race above
> > would be impossible.  
> 
> I would love to see an alternative patch.

Turn off busy poll? 
The poll stuff runs risk of breaking more things.

  reply	other threads:[~2017-02-27 23:09 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-25 14:22 [PATCH net] net/mlx4_en: reception NAPI/IRQ race breaker Eric Dumazet
2017-02-26 16:32 ` Saeed Mahameed
2017-02-26 17:34   ` Eric Dumazet
2017-02-26 17:40     ` Eric Dumazet
2017-02-26 18:03       ` Eric Dumazet
2017-02-27  3:31 ` [PATCH net] net: solve a NAPI race Eric Dumazet
2017-02-27 14:06   ` Eric Dumazet
2017-02-27 14:21   ` [PATCH v2 " Eric Dumazet
2017-02-27 16:19     ` David Miller
2017-02-27 16:44       ` Eric Dumazet
2017-02-27 17:10         ` Eric Dumazet
2017-02-28  2:08         ` David Miller
2017-03-01  0:22           ` Francois Romieu
2017-03-01  1:04             ` Stephen Hemminger
2017-02-27 21:00       ` Alexander Duyck
2017-02-27 20:18     ` [PATCH v3 " Eric Dumazet
2017-02-27 22:14       ` Stephen Hemminger
2017-02-27 22:35         ` Eric Dumazet
2017-02-27 22:44           ` Stephen Hemminger [this message]
2017-02-27 22:48             ` David Miller
2017-02-27 23:23               ` Stephen Hemminger
2017-02-28 10:14           ` David Laight
2017-02-28 13:04             ` Eric Dumazet
2017-02-28 13:20             ` Eric Dumazet
2017-02-28 16:17       ` Stephen Hemminger
2017-02-28 16:57         ` Eric Dumazet
2017-02-28 18:34       ` [PATCH v4 " Eric Dumazet
2017-03-01 17:53         ` David Miller
2017-02-28 17:20     ` [PATCH v2 " Alexander Duyck
2017-02-28 17:47       ` Eric Dumazet
2017-03-01 10:41       ` David Laight
2017-03-01 16:14         ` Alexander Duyck
2017-03-01 17:32           ` Eric Dumazet
2017-03-02 10:24             ` David Laight

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