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

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Date:   Thu, 5 May 2022 10:35:17 +0800
From:   zhenwei pi <pizhenwei@...edance.com>
To:     arei.gonglei@...wei.com, mst@...hat.com, jasowang@...hat.com
Cc:     herbert@...dor.apana.org.au, linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        linux-crypto@...r.kernel.org, helei.sig11@...edance.com,
        davem@...emloft.net
Subject: PING: [PATCH v4 0/5] virtio-crypto: Improve performance

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