PING: [PATCH v4 0/5] virtio-crypto: Improve performance

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Hi, Lei

Jason replied in another patch:
Still hundreds of lines of changes, I'd leave this change to other
maintainers to decide.

Quite frankly, the virtio crypto driver changed only a few in the past, and the performance of control queue is not good enough. I am in doubt about that this driver is not used widely. So I'd like to rework a lot, it would be best to complete this work in 5.18 window.

This gets different point with Jason. I would appreciate it if you could give me any hint.

On 4/24/22 18:41, zhenwei pi wrote:
Hi, Lei
I'd like to move helper and callback functions(Eg, virtcrypto_clear_request
  and virtcrypto_ctrlq_callback) from xx_core.c to xx_common.c,
then the xx_core.c supports:
   - probe/remove/irq affinity seting for a virtio device
   - basic virtio related operations

xx_common.c supports:
   - common helpers/functions for algos

Do you have any suggestion about this?

v3 -> v4:
  - Don't create new file virtio_common.c, the new functions are added
    into virtio_crypto_core.c
  - Split the first patch into two parts:
      1, change code style,
      2, use private buffer instead of shared buffer
  - Remove relevant change.
  - Other minor changes.

v2 -> v3:
  - Jason suggested that spliting the first patch into two part:
      1, using private buffer
      2, remove the busy polling
    Rework as Jason's suggestion, this makes the smaller change in
    each one and clear.

v1 -> v2:
  - Use kfree instead of kfree_sensitive for insensitive buffer.
  - Several coding style fix.
  - Use memory from current node, instead of memory close to device
  - Add more message in commit, also explain why removing per-device
    request buffer.
  - Add necessary comment in code to explain why using kzalloc to
    allocate struct virtio_crypto_ctrl_request.

v1:
The main point of this series is to improve the performance for
virtio crypto:
- Use wait mechanism instead of busy polling for ctrl queue, this
   reduces CPU and lock racing, it's possiable to create/destroy session
   parallelly, QPS increases from ~40K/s to ~200K/s.
- Enable retry on crypto engine to improve performance for data queue,
   this allows the larger depth instead of 1.
- Fix dst data length in akcipher service.
- Other style fix.

lei he (2):
   virtio-crypto: adjust dst_len at ops callback
   virtio-crypto: enable retry for virtio-crypto-dev

zhenwei pi (3):
   virtio-crypto: change code style
   virtio-crypto: use private buffer for control request
   virtio-crypto: wait ctrl queue instead of busy polling

  .../virtio/virtio_crypto_akcipher_algs.c      |  83 ++++++-----
  drivers/crypto/virtio/virtio_crypto_common.h  |  21 ++-
  drivers/crypto/virtio/virtio_crypto_core.c    |  55 ++++++-
  .../virtio/virtio_crypto_skcipher_algs.c      | 140 ++++++++----------
  4 files changed, 180 insertions(+), 119 deletions(-)


--
zhenwei pi



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