linux-kernel - [RFC PATCH 0/3] Sharing MSIX irq for tx/rx queue pairs

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Date:	Fri, 26 Dec 2014 10:53:42 +0800
From:	Jason Wang <jasowang@...hat.com>
To:	rusty@...tcorp.com.au, mst@...hat.com,
	virtualization@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org
Cc:	Jason Wang <jasowang@...hat.com>
Subject: [RFC PATCH 0/3] Sharing MSIX irq for tx/rx queue pairs

Hi all:

This series try to share MSIX irq for each tx/rx queue pair. This is
done through:

- introducing virtio pci channel which are group of virtqueues that
  sharing a single MSIX irq (Patch 1)
- expose channel setting to virtio core api (Patch 2)
- try to use channel setting in virtio-net (Patch 3)

For the transport that does not support channel, channel paramters
were simply ignored. For devices that does not use channel, it can
simply pass NULL or zero to virito core.

With the patch, 1 MSIX irq were saved for each TX/RX queue pair.

Please review.

Thanks

Jason Wang (3):
  virtio-pci: introduce channels
  virtio: let vp_find_vqs accept channel setting paramters
  virtio-net: using single MSIX irq for each TX/RX queue pair

 drivers/block/virtio_blk.c             |   3 +-
 drivers/char/virtio_console.c          |   3 +-
 drivers/lguest/lguest_device.c         |   5 +-
 drivers/misc/mic/card/mic_virtio.c     |   5 +-
 drivers/net/caif/caif_virtio.c         |   3 +-
 drivers/net/virtio_net.c               |  26 ++++-
 drivers/remoteproc/remoteproc_virtio.c |   5 +-
 drivers/rpmsg/virtio_rpmsg_bus.c       |   3 +-
 drivers/s390/kvm/kvm_virtio.c          |   5 +-
 drivers/s390/kvm/virtio_ccw.c          |   5 +-
 drivers/scsi/virtio_scsi.c             |   3 +-
 drivers/virtio/virtio_balloon.c        |   3 +-
 drivers/virtio/virtio_mmio.c           |   5 +-
 drivers/virtio/virtio_pci_common.c     | 207 ++++++++++++++++++++-------------
 drivers/virtio/virtio_pci_common.h     |  19 ++-
 include/linux/virtio_config.h          |   8 +-
 16 files changed, 208 insertions(+), 100 deletions(-)

-- 
1.8.3.1

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