[PATCH v5 0/5] virtio-crypto: Improve performance

[zhenwei pi]

v4 -> v5:
 - Fix potentially dereferencing uninitialized variables in
   'virtio-crypto: use private buffer for control request'.
   Thanks to Dan Carpenter!

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      |  95 ++++++------
 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, 182 insertions(+), 129 deletions(-)

-- 
2.20.1