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authorJussi Kivilinna <jussi.kivilinna@iki.fi>2013-06-02 19:51:47 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2013-06-05 16:33:22 +0800
commit3ef91f21a66826cf1003bb7b3c51ac2de4c28182 (patch)
tree70196d4c039d76131a86ca9e41d66ee1ad5d8262
parentde614e561b9c633073caae8f86399aa8923ef85d (diff)
downloadvexpress-lsk-3ef91f21a66826cf1003bb7b3c51ac2de4c28182.tar.gz
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: Jussi Kivilinna <jussi.kivilinna@iki.fi> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--crypto/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 622d8a48cbe..27720af741b 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -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