linux-kernel - [PATCHv2 RFC 0/4] virtio and vhost-net capacity handling

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Message-ID: <cover.1307029008.git.mst@redhat.com>
Date:	Thu, 2 Jun 2011 18:42:35 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Rusty Russell <rusty@...tcorp.com.au>,
	Carsten Otte <cotte@...ibm.com>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	linux390@...ibm.com, Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Shirley Ma <xma@...ibm.com>, lguest@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
	linux-s390@...r.kernel.org, kvm@...r.kernel.org,
	Krishna Kumar <krkumar2@...ibm.com>,
	Tom Lendacky <tahm@...ux.vnet.ibm.com>, steved@...ibm.com,
	habanero@...ux.vnet.ibm.com
Subject: [PATCHv2 RFC 0/4] virtio and vhost-net capacity handling

OK, here's a new attempt to use the new capacity api.  I also added more
comments to clarify the logic.  Hope this is more readable.  Let me know
pls.

This is on top of the patches applied by Rusty.

Warning: untested. Posting now to give people chance to
comment on the API.

Changes from v1:
- fix comment in patch 2 to correct confusion noted by Rusty
- rewrite patch 3 along the lines suggested by Rusty
  note: it's not exactly the same but I hope it's close
  enough, the main difference is that mine does limited
  polling even in the unlikely xmit failure case.
- added a patch to not return capacity from add_buf
  it always looked like a weird hack

Michael S. Tsirkin (4):
  virtio_ring: add capacity check API
  virtio_net: fix tx capacity checks using new API
  virtio_net: limit xmit polling
  Revert "virtio: make add_buf return capacity remaining:

 drivers/net/virtio_net.c     |  111 ++++++++++++++++++++++++++----------------
 drivers/virtio/virtio_ring.c |   10 +++-
 include/linux/virtio.h       |    7 ++-
 3 files changed, 84 insertions(+), 44 deletions(-)

-- 
1.7.5.53.gc233e
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