Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Ming Lei <ming.lei@redhat.com>
To:     Thomas Gleixner <tglx@linutronix.de>
Cc:     linux-kernel@vger.kernel.org, Ming Lei <ming.lei@redhat.com>,
        Long Li <longli@microsoft.com>, Ingo Molnar <mingo@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Keith Busch <keith.busch@intel.com>, Jens Axboe <axboe@fb.com>,
        Christoph Hellwig <hch@lst.de>,
        Sagi Grimberg <sagi@grimberg.me>,
        John Garry <john.garry@huawei.com>,
        Hannes Reinecke <hare@suse.com>,
        linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org
Subject: [PATCH 0/4] genirq/nvme: add IRQF_RESCUE_THREAD for avoiding IRQ flood
Date:   Tue, 27 Aug 2019 16:53:40 +0800
Message-Id: <20190827085344.30799-1-ming.lei@redhat.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi Guys,

The 1st patch implements one simple EWMA based mechanism for detecting IRQ flood.

The 2nd patch adds IRQF_RESCUE_THREAD, and interrupts will be handled in
the created rescue thread in case that IRQ flood comes.

The 3rd patch applies the flag of IRQF_RESCURE_THREAD for NVMe.

The last patch uses irq's affinity in case of IRQF_RESCUE_THREAD.

Please review & comment!

Long, please test and see if your issue can be fixed.

Ming Lei (4):
  softirq: implement IRQ flood detection mechanism
  genirq: add IRQF_RESCUE_THREAD
  nvme: pci: pass IRQF_RESCURE_THREAD to request_threaded_irq
  genirq: use irq's affinity for threaded irq with IRQF_RESCUE_THREAD

 drivers/base/cpu.c        | 25 +++++++++++++++++++++
 drivers/nvme/host/pci.c   | 17 +++++++++++++--
 include/linux/hardirq.h   |  2 ++
 include/linux/interrupt.h |  6 +++++
 kernel/irq/handle.c       |  6 ++++-
 kernel/irq/manage.c       | 25 ++++++++++++++++++++-
 kernel/softirq.c          | 46 +++++++++++++++++++++++++++++++++++++++
 7 files changed, 123 insertions(+), 4 deletions(-)

Cc: Long Li <longli@microsoft.com>
Cc: Ingo Molnar <mingo@redhat.com>,
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: John Garry <john.garry@huawei.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: linux-nvme@lists.infradead.org
Cc: linux-scsi@vger.kernel.org


-- 
2.20.1