From: Huang Ying Subject: [PATCH 1/3] crypto: Use dedicated workqueue for crypto subsystem Date: Mon, 02 Feb 2009 14:42:14 +0800 Message-ID: <1233556934.19806.57.camel@yhuang-dev.sh.intel.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-uR8Gy2LaaMJl8A2zH1FI" Cc: Andrew Morton , "linux-kernel@vger.kernel.org" , "linux-crypto@vger.kernel.org" To: Herbert Xu Return-path: Received: from mga09.intel.com ([134.134.136.24]:23415 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751393AbZBBGmS (ORCPT ); Mon, 2 Feb 2009 01:42:18 -0500 Sender: linux-crypto-owner@vger.kernel.org List-ID: --=-uR8Gy2LaaMJl8A2zH1FI Content-Type: text/plain Content-Transfer-Encoding: quoted-printable 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 --- crypto/Kconfig | 3 +++ crypto/Makefile | 2 ++ crypto/crypto_wq.c | 38 ++++++++++++++++++++++++++++++++++++++ include/crypto/crypto_wq.h | 7 +++++++ 4 files changed, 50 insertions(+) --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -106,6 +106,9 @@ config CRYPTO_NULL help These are 'Null' algorithms, used by IPsec, which do nothing. =20 +config CRYPTO_WORKQUEUE + tristate + config CRYPTO_CRYPTD tristate "Software async crypto daemon" select CRYPTO_BLKCIPHER --- a/crypto/Makefile +++ b/crypto/Makefile @@ -5,6 +5,8 @@ obj-$(CONFIG_CRYPTO) +=3D crypto.o crypto-objs :=3D api.o cipher.o digest.o compress.o =20 +obj-$(CONFIG_CRYPTO_WORKQUEUE) +=3D crypto_wq.o + obj-$(CONFIG_CRYPTO_FIPS) +=3D fips.o =20 crypto_algapi-$(CONFIG_PROC_FS) +=3D proc.o --- /dev/null +++ b/crypto/crypto_wq.c @@ -0,0 +1,38 @@ +/* + * Workqueue for crypto subsystem + * + * Copyright (c) 2009 Intel Corp. + * Author: Huang Ying + * + * 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 F= ree + * Software Foundation; either version 2 of the License, or (at your optio= n) + * any later version. + * + */ + +#include +#include +#include + +struct workqueue_struct *kcrypto_wq; +EXPORT_SYMBOL_GPL(kcrypto_wq); + +static int __init crypto_wq_init(void) +{ + kcrypto_wq =3D 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"); --- /dev/null +++ b/include/crypto/crypto_wq.h @@ -0,0 +1,7 @@ +#ifndef CRYPTO_WQ_H +#define CRYPTO_WQ_H + +#include + +extern struct workqueue_struct *kcrypto_wq; +#endif --=-uR8Gy2LaaMJl8A2zH1FI Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEABECAAYFAkmGlcMACgkQKhFGF+eHlpjB9gCfftD0tTc/a+2cjk+Z+x+urD0H PFcAnRBQCY8+RLK4chPEoxqMLjP6ZEpH =52cR -----END PGP SIGNATURE----- --=-uR8Gy2LaaMJl8A2zH1FI--