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-rw-r--r--drivers/md/dm-crypt.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index fc7d8b8a654f..509fb20f7f86 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1885,6 +1885,13 @@ static int crypt_alloc_tfms_skcipher(struct crypt_config *cc, char *ciphermode)
}
}
+ /*
+ * dm-crypt performance can vary greatly depending on which crypto
+ * algorithm implementation is used. Help people debug performance
+ * problems by logging the ->cra_driver_name.
+ */
+ DMINFO("%s using implementation \"%s\"", ciphermode,
+ crypto_skcipher_alg(any_tfm(cc))->base.cra_driver_name);
return 0;
}
@@ -1903,6 +1910,8 @@ static int crypt_alloc_tfms_aead(struct crypt_config *cc, char *ciphermode)
return err;
}
+ DMINFO("%s using implementation \"%s\"", ciphermode,
+ crypto_aead_alg(any_tfm_aead(cc))->base.cra_driver_name);
return 0;
}