Commit 3ef91f21 authored by Jussi Kivilinna's avatar Jussi Kivilinna Committed by Herbert Xu
Browse files

crypto: twofish - disable AVX2 implementation 



It appears that the performance of 'vpgatherdd' is suboptimal for this kind of
workload (tested on Core i5-4570) and causes twofish_avx2 to be significantly
slower than twofish_avx. So disable the AVX2 implementation to avoid
performance regressions.

Signed-off-by: default avatarJussi Kivilinna <jussi.kivilinna@iki.fi>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent de614e56

crypto/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -1299,6 +1299,7 @@ config CRYPTO_TWOFISH_AVX_X86_64 
config CRYPTO_TWOFISH_AVX2_X86_64

	tristate "Twofish cipher algorithm (x86_64/AVX2)"

	depends on X86 && 64BIT

	depends on BROKEN

	select CRYPTO_ALGAPI

	select CRYPTO_CRYPTD

	select CRYPTO_ABLK_HELPER_X86

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