linux-kernel - [RFC PATCH 0/4] softirq: Per vector threading v3

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Date:   Fri, 19 Jan 2018 16:46:10 +0100
From:   Frederic Weisbecker <frederic@...nel.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Frederic Weisbecker <frederic@...nel.org>,
        Levin Alexander <alexander.levin@...izon.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Mauro Carvalho Chehab <mchehab@...pensource.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Hannes Frederic Sowa <hannes@...essinduktion.org>,
        "Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>,
        Wanpeng Li <wanpeng.li@...mail.com>,
        Dmitry Safonov <dima@...sta.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Radu Rendec <rrendec@...sta.com>,
        Ingo Molnar <mingo@...nel.org>,
        Stanislaw Gruszka <sgruszka@...hat.com>,
        Rik van Riel <riel@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>,
        David Miller <davem@...emloft.net>
Subject: [RFC PATCH 0/4] softirq: Per vector threading v3

As per Linus suggestion, this take doesn't limit the number of occurences
per jiffy anymore but instead defers a vector to workqueues as soon as
it gets re-enqueued on IRQ tail.

No tunable here, so testing should be easier.

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
	softirq/thread-v3

HEAD: 6835e92cbd70ef4a056987d2e1ed383b294429d4

Thanks,
	Frederic
---

Frederic Weisbecker (4):
      softirq: Limit vector to a single iteration on IRQ tail
      softirq: Per vector deferment to workqueue
      softirq: Defer to workqueue when rescheduling is needed
      softirq: Replace ksoftirqd with workqueues entirely


 Documentation/RCU/stallwarn.txt |   4 +-
 include/linux/interrupt.h       |   7 +-
 kernel/sched/cputime.c          |  12 +--
 kernel/sched/sched.h            |   4 +-
 kernel/softirq.c                | 223 +++++++++++++++++++++++-----------------
 net/ipv4/tcp_output.c           |   5 +-
 6 files changed, 144 insertions(+), 111 deletions(-)