From: David Miller <davem@davemloft.net>
To: stephen@networkplumber.org
Cc: eric.dumazet@gmail.com, netdev@vger.kernel.org
Subject: Re: [PATCH v3 net] net: solve a NAPI race
Date: Mon, 27 Feb 2017 17:48:54 -0500 (EST) [thread overview]
Message-ID: <20170227.174854.1727197935165904806.davem@davemloft.net> (raw)
In-Reply-To: <20170227144455.174ab1e5@xeon-e3>
From: Stephen Hemminger <stephen@networkplumber.org>
Date: Mon, 27 Feb 2017 14:44:55 -0800
> 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.
Eric is exactly trying to make busy poll even more prominent in
the stack, not less prominent.
It's an important component of some performance improvements he is
working on.
next prev parent reply other threads:[~2017-02-27 23:43 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
2017-02-27 22:48 ` David Miller [this message]
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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