On 8/24/2023 9:01 AM, Sabrina Dubroca wrote:

2023-08-23, 16:22:31 -0400, Scott Dial wrote:

quoted

AES-NI's implementation of gcm(aes) requires the FPU, so if it's busy the
decrypt gets stuck on the cryptd queue, but that queue is not
order-preserving.

It should be (per CPU [*]). The queue itself is a linked list, and if we
have requests on the queue we don't let new requests skip the queue.

My apologies, I'll be the first to admit that I have not tracked all of 
the code changes to either the macsec driver or linux-crypto since I 
first made the commit. This comment that requests are queued forced me 
to review the code again and it appears that the queueing issue was 
resolved in v5.2-rc1 with commit 1661131a0479, so I no longer believe we 
need the CRYPTO_ALG_ASYNC since v5.2 and going forward.

So, I believe my patch should be reverted from the mainline kernel and 
any releases that are still getting maintenance releases -- I believe 
v5.4, v5.10, v5.15, and v6.1.

-- 
Scott Dial
scott@scottdial.com