LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Tiwei Bie <tiwei.bie@intel.com>
To: mst@redhat.com, jasowang@redhat.com,
	virtualization@lists.linux-foundation.org,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Cc: wexu@redhat.com, jfreimann@redhat.com, tiwei.bie@intel.com
Subject: [RFC v5 0/5] virtio: support packed ring
Date: Tue, 22 May 2018 16:16:43 +0800	[thread overview]
Message-ID: <20180522081648.14768-1-tiwei.bie@intel.com> (raw)

Hello everyone,

This RFC implements packed ring support in virtio driver.

Some simple functional tests have been done with Jason's
packed ring implementation in vhost (RFC v4):

https://lkml.org/lkml/2018/5/16/501

Both of ping and netperf worked as expected w/ EVENT_IDX
disabled. Ping worked as expected w/ EVENT_IDX enabled,
but netperf didn't (A hack has been added in the driver
to make netperf test pass in this case. The hack can be
found by `grep -rw XXX` in the code).

TODO:
- Refinements (for code and commit log);
- More tests;
- Bug fixes;

RFC v4 -> RFC v5:
- Save DMA addr, etc in desc state (Jason);
- Track used wrap counter;

RFC v3 -> RFC v4:
- Make ID allocation support out-of-order (Jason);
- Various fixes for EVENT_IDX support;

RFC v2 -> RFC v3:
- Split into small patches (Jason);
- Add helper virtqueue_use_indirect() (Jason);
- Just set id for the last descriptor of a list (Jason);
- Calculate the prev in virtqueue_add_packed() (Jason);
- Fix/improve desc suppression code (Jason/MST);
- Refine the code layout for XXX_split/packed and wrappers (MST);
- Fix the comments and API in uapi (MST);
- Remove the BUG_ON() for indirect (Jason);
- Some other refinements and bug fixes;

RFC v1 -> RFC v2:
- Add indirect descriptor support - compile test only;
- Add event suppression supprt - compile test only;
- Move vring_packed_init() out of uapi (Jason, MST);
- Merge two loops into one in virtqueue_add_packed() (Jason);
- Split vring_unmap_one() for packed ring and split ring (Jason);
- Avoid using '%' operator (Jason);
- Rename free_head -> next_avail_idx (Jason);
- Add comments for virtio_wmb() in virtqueue_add_packed() (Jason);
- Some other refinements and bug fixes;

Thanks!

Tiwei Bie (5):
  virtio: add packed ring definitions
  virtio_ring: support creating packed ring
  virtio_ring: add packed ring support
  virtio_ring: add event idx support in packed ring
  virtio_ring: enable packed ring

 drivers/virtio/virtio_ring.c       | 1354 ++++++++++++++++++++++------
 include/linux/virtio_ring.h        |    8 +-
 include/uapi/linux/virtio_config.h |    5 +-
 include/uapi/linux/virtio_ring.h   |   36 +
 4 files changed, 1125 insertions(+), 278 deletions(-)

-- 
2.17.0

             reply	other threads:[~2018-05-22  8:17 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-22  8:16 Tiwei Bie [this message]
2018-05-22  8:16 ` [RFC v5 1/5] virtio: add packed ring definitions Tiwei Bie
2018-05-22  8:16 ` [RFC v5 2/5] virtio_ring: support creating packed ring Tiwei Bie
2018-05-29  2:49   ` Jason Wang
2018-05-29  5:24     ` Tiwei Bie
2018-05-29  6:13       ` Jason Wang
2018-05-22  8:16 ` [RFC v5 3/5] virtio_ring: add packed ring support Tiwei Bie
2018-05-29  3:18   ` Jason Wang
2018-05-29  5:11     ` Tiwei Bie
2018-05-29  6:16       ` Jason Wang
2018-05-22  8:16 ` [RFC v5 4/5] virtio_ring: add event idx support in packed ring Tiwei Bie
2018-05-22  8:16 ` [RFC v5 5/5] virtio_ring: enable " Tiwei Bie
2018-05-25  2:31 ` [RFC v5 0/5] virtio: support " Jason Wang
2018-05-25  3:07   ` Tiwei Bie

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20180522081648.14768-1-tiwei.bie@intel.com \
    --to=tiwei.bie@intel.com \
    --cc=jasowang@redhat.com \
    --cc=jfreimann@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mst@redhat.com \
    --cc=netdev@vger.kernel.org \
    --cc=virtualization@lists.linux-foundation.org \
    --cc=wexu@redhat.com \
    --subject='Re: [RFC v5 0/5] virtio: support packed ring' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).