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author | Huang Ying <ying.huang@intel.com> | 2009-02-19 14:33:40 +0800 |
---|---|---|
committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-02-19 14:33:40 +0800 |
commit | 9adc7bd896dd6f65d38bee2bc10aab9dbfc21daa (patch) | |
tree | a9eff1772b8e8bdd7af5be61314d554de69fa4db | |
parent | ee1d02b0c208dfa3376a3d5b29ef4f7ccdb97186 (diff) | |
download | linux-crypto-9adc7bd896dd6f65d38bee2bc10aab9dbfc21daa.tar.gz linux-crypto-9adc7bd896dd6f65d38bee2bc10aab9dbfc21daa.zip |
crypto: api - Use dedicated workqueue for crypto subsystem
Use dedicated workqueue for crypto subsystem
A dedicated workqueue named kcrypto_wq is created to be used by crypto
subsystem. The system shared keventd_wq is not suitable for
encryption/decryption, because of potential starvation problem.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r-- | crypto/Kconfig | 3 | ||||
-rw-r--r-- | crypto/Makefile | 2 | ||||
-rw-r--r-- | crypto/crypto_wq.c | 38 |
3 files changed, 43 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig index a83ce046..420b630a 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -106,6 +106,9 @@ config CRYPTO_NULL help These are 'Null' algorithms, used by IPsec, which do nothing. +config CRYPTO_WORKQUEUE + tristate + config CRYPTO_CRYPTD tristate "Software async crypto daemon" select CRYPTO_BLKCIPHER diff --git a/crypto/Makefile b/crypto/Makefile index 46b08bf2..e05a844e 100644 --- a/crypto/Makefile +++ b/crypto/Makefile @@ -5,6 +5,8 @@ obj-$(CONFIG_CRYPTO) += crypto.o crypto-objs := api.o cipher.o digest.o compress.o +obj-$(CONFIG_CRYPTO_WORKQUEUE) += crypto_wq.o + obj-$(CONFIG_CRYPTO_FIPS) += fips.o crypto_algapi-$(CONFIG_PROC_FS) += proc.o diff --git a/crypto/crypto_wq.c b/crypto/crypto_wq.c new file mode 100644 index 00000000..fdcf6248 --- /dev/null +++ b/crypto/crypto_wq.c @@ -0,0 +1,38 @@ +/* + * Workqueue for crypto subsystem + * + * Copyright (c) 2009 Intel Corp. + * Author: Huang Ying <ying.huang@intel.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + */ + +#include <linux/workqueue.h> +#include <crypto/algapi.h> +#include <crypto/crypto_wq.h> + +struct workqueue_struct *kcrypto_wq; +EXPORT_SYMBOL_GPL(kcrypto_wq); + +static int __init crypto_wq_init(void) +{ + kcrypto_wq = create_workqueue("crypto"); + if (unlikely(!kcrypto_wq)) + return -ENOMEM; + return 0; +} + +static void __exit crypto_wq_exit(void) +{ + destroy_workqueue(kcrypto_wq); +} + +module_init(crypto_wq_init); +module_exit(crypto_wq_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Workqueue for crypto subsystem"); |