linux-kernel - [RFC PATCH 00/11] VMBus channel interrupt reassignment

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Date:   Wed, 25 Mar 2020 23:54:54 +0100
From:   "Andrea Parri (Microsoft)" <parri.andrea@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     "K . Y . Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, linux-hyperv@...r.kernel.org,
        Michael Kelley <mikelley@...rosoft.com>,
        Dexuan Cui <decui@...rosoft.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        "Andrea Parri (Microsoft)" <parri.andrea@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Andrew Murray <amurray@...goodpenguin.co.uk>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [RFC PATCH 00/11] VMBus channel interrupt reassignment

Hi all,

This series introduces changes in the VMBus drivers to reassign (at
runtime) the CPU that a VMbus channel will interrupt.  This feature
can be used for load balancing or other purposes, e.g. to offline a
given vCPU (vCPUs with no interrupts assigned can be taken offline).

Thanks,
  Andrea

Cc: "David S. Miller" <davem@...emloft.net>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc: Andrew Murray <amurray@...goodpenguin.co.uk>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: "James E.J. Bottomley" <jejb@...ux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@...cle.com>

Andrea Parri (Microsoft) (11):
  Drivers: hv: vmbus: Always handle the VMBus messages on CPU0
  Drivers: hv: vmbus: Don't bind the offer&rescind works to a specific
    CPU
  Drivers: hv: vmbus: Replace the per-CPU channel lists with a global
    array of channels
  hv_netvsc: Disable NAPI before closing the VMBus channel
  hv_utils: Always execute the fcopy and vss callbacks in a tasklet
  Drivers: hv: vmbus: Use a spin lock for synchronizing channel
    scheduling vs. channel removal
  PCI: hv: Prepare hv_compose_msi_msg() for the
    VMBus-channel-interrupt-to-vCPU reassignment functionality
  Drivers: hv: vmbus: Remove the unused HV_LOCALIZED channel affinity
    logic
  Drivers: hv: vmbus: Synchronize init_vp_index() vs. CPU hotplug
  Drivers: hv: vmbus: Introduce the CHANNELMSG_MODIFYCHANNEL message
    type
  scsi: storvsc: Re-init stor_chns when a channel interrupt is
    re-assigned

 drivers/hv/channel.c                |  58 +++--
 drivers/hv/channel_mgmt.c           | 326 ++++++++++++++--------------
 drivers/hv/connection.c             |  58 +----
 drivers/hv/hv.c                     |  16 +-
 drivers/hv/hv_fcopy.c               |   2 +-
 drivers/hv/hv_snapshot.c            |   2 +-
 drivers/hv/hv_trace.h               |  19 ++
 drivers/hv/hyperv_vmbus.h           |  32 ++-
 drivers/hv/vmbus_drv.c              | 241 ++++++++++++++++----
 drivers/net/hyperv/netvsc.c         |   7 +-
 drivers/pci/controller/pci-hyperv.c |  44 ++--
 drivers/scsi/storvsc_drv.c          |  95 +++++++-
 include/linux/hyperv.h              |  51 ++---
 13 files changed, 599 insertions(+), 352 deletions(-)

-- 
2.24.0