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[CRYPTO] chainiv: Avoid lock spinning where possible

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This patch makes chainiv avoid spinning by postponing requests on lock
contention if the user allows the use of asynchronous algorithms.  If
a synchronous algorithm is requested then we behave as before.

This should improve IPsec performance on SMP when two CPUs attempt to
transmit over the same SA.  Currently one of them will spin doing nothing
waiting for the other CPU to finish its encryption.  This patch makes it
postpone the request and get on with other work.

If only one CPU is transmitting for a given SA, then we will process
the request synchronously as before.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2007-12-14 22:28:14 +08:00
parent 4726204200
commit e7cd2514ea
2 changed files with 215 additions and 10 deletions
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13
include/crypto/internal/skcipher.h
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@@ -70,6 +70,19 @@ static inline struct crypto_ablkcipher *skcipher_geniv_cipher(
return crypto_ablkcipher_crt(geniv)->base;
}
static inline int skcipher_enqueue_givcrypt(
struct crypto_queue *queue, struct skcipher_givcrypt_request *request)
{
return ablkcipher_enqueue_request(queue, &request->creq);
}
static inline struct skcipher_givcrypt_request *skcipher_dequeue_givcrypt(
struct crypto_queue *queue)
{
return container_of(ablkcipher_dequeue_request(queue),
struct skcipher_givcrypt_request, creq);
}
static inline void *skcipher_givcrypt_reqctx(
struct skcipher_givcrypt_request *req)
{