From: Rik van Riel <riel@redhat.com>
To: Eric Dumazet <edumazet@google.com>,
Hannes Frederic Sowa <hannes@stressinduktion.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Eric Dumazet <eric.dumazet@gmail.com>,
Paolo Abeni <pabeni@redhat.com>, netdev <netdev@vger.kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Jiri Pirko <jiri@mellanox.com>,
Daniel Borkmann <daniel@iogearbox.net>,
Alexei Starovoitov <ast@plumgrid.com>,
Alexander Duyck <aduyck@mirantis.com>,
Tom Herbert <tom@herbertland.com>, Ingo Molnar <mingo@kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [RFC PATCH 0/2] net: threadable napi poll loop
Date: Wed, 11 May 2016 11:01:43 -0400 [thread overview]
Message-ID: <1462978903.7134.33.camel@redhat.com> (raw)
In-Reply-To: <CANn89i+Op8UsvrsZKKzHfC5j6gLMmY1ZbCg=OY8o4oW8RT5sxg@mail.gmail.com>
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On Wed, 2016-05-11 at 07:40 -0700, Eric Dumazet wrote:
> On Wed, May 11, 2016 at 6:13 AM, Hannes Frederic Sowa
> <hannes@stressinduktion.org> wrote:
>
> > This looks racy to me as the ksoftirqd could be in the progress to
> > stop
> > and we would miss another softirq invocation.
>
> Looking at smpboot_thread_fn(), it looks fine :
>
Additionally, we are talking about waking up
ksoftirqd on the same CPU.
That means the wakeup code could interrupt
ksoftirqd almost going to sleep, but the
two code paths could not run simultaneously.
That does narrow the scope considerably.
--
All rights reversed
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next prev parent reply other threads:[~2016-05-11 15:01 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-10 14:11 [RFC PATCH 0/2] net: threadable napi poll loop Paolo Abeni
2016-05-10 14:11 ` [RFC PATCH 1/2] net: implement threaded-able napi poll loop support Paolo Abeni
2016-05-10 14:11 ` [RFC PATCH 2/2] net: add sysfs attribute to control napi threaded mode Paolo Abeni
2016-05-10 14:29 ` [RFC PATCH 0/2] net: threadable napi poll loop Eric Dumazet
2016-05-10 15:51 ` David Miller
2016-05-10 16:03 ` Paolo Abeni
2016-05-10 16:08 ` Eric Dumazet
2016-05-10 20:22 ` Paolo Abeni
2016-05-10 20:45 ` David Miller
2016-05-10 20:50 ` Rik van Riel
2016-05-10 20:52 ` David Miller
2016-05-10 21:01 ` Rik van Riel
2016-05-10 20:46 ` Hannes Frederic Sowa
2016-05-10 21:09 ` Eric Dumazet
2016-05-10 21:31 ` Eric Dumazet
2016-05-10 21:35 ` Rik van Riel
2016-05-10 21:53 ` Eric Dumazet
2016-05-10 22:02 ` Eric Dumazet
2016-05-10 22:44 ` Eric Dumazet
2016-05-10 22:02 ` Rik van Riel
2016-05-11 17:55 ` Eric Dumazet
2016-05-10 22:32 ` Hannes Frederic Sowa
2016-05-10 22:51 ` Eric Dumazet
2016-05-11 6:55 ` Peter Zijlstra
2016-05-11 13:13 ` Hannes Frederic Sowa
2016-05-11 14:40 ` Eric Dumazet
2016-05-11 15:01 ` Rik van Riel [this message]
2016-05-11 15:50 ` Eric Dumazet
2016-05-11 21:56 ` Eric Dumazet
2016-05-12 20:07 ` Paolo Abeni
2016-05-12 20:49 ` Eric Dumazet
2016-05-12 20:58 ` Paolo Abeni
2016-05-12 21:05 ` Eric Dumazet
2016-05-13 16:50 ` Paolo Abeni
2016-05-13 17:03 ` Eric Dumazet
2016-05-13 17:19 ` Paolo Abeni
2016-05-13 17:36 ` Eric Dumazet
2016-05-16 13:10 ` Paolo Abeni
2016-05-16 13:38 ` Eric Dumazet
2016-05-11 9:48 ` Paolo Abeni
2016-05-11 13:08 ` Eric Dumazet
2016-05-11 13:39 ` Hannes Frederic Sowa
2016-05-11 13:47 ` Hannes Frederic Sowa
2016-05-11 14:38 ` Paolo Abeni
2016-05-11 14:45 ` Eric Dumazet
2016-05-11 22:47 ` Hannes Frederic Sowa
2016-05-10 15:57 ` Thomas Gleixner
2016-05-10 20:41 ` Paolo Abeni
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