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From: Linus Torvalds <torvalds@linux-foundation.org>
To: Herbert Xu <herbert@gondor.hengli.com.au>
Cc: "David S. Miller" <davem@davemloft.net>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linux Crypto Mailing List <linux-crypto@vger.kernel.org>
Subject: Re: Crypto Update for 2.6.38
Date: Thu, 6 Jan 2011 14:43:35 -0800
Message-ID: <AANLkTinbH8i8rjUxACV5PkdLuVc9YccT+E5x=ZBWunyU@mail.gmail.com> (raw)
In-Reply-To: <20110106223042.GA27080@gondor.apana.org.au>

On Thu, Jan 6, 2011 at 2:30 PM, Herbert Xu <herbert@gondor.hengli.com.au> wrote:
>
> The main use-case is bulk encryption/hashing in user-space.  For
> example, on Sparc Niagara2 you need to use SPU (Stream Processing
> Unit) in order to do crypto at 10Gb/s over the network.

Umm. But doesn't that require that the data then be sent to the network?

Why would a user-space -> crypto engine -> user space -> network chip
thing ever be good enough? Niagara is so slow that the whole bounce
thing will totally negate all the SPU advantages.

Your interface doesn't seem to support the use case that you actually
want, which is to avoid the bouncing back and forth between user space
buffers.

And if you bounce back and forth, I bet you can't get that 10Gb/s anyway.

Can you do the "bypass directly to the TCP stream" with the interface
you added? It isn't at all obvious how it would work.

So let me repeat ONE MORE TIME:

 - I understand that your interface can use the hw that exists

 - but I still want real-world use cases to show that it actually
works and makes sense in practice.

Don't give me "we could use the SPU" crap. Give me "this program
actually uses the SPU and gets better performance thanks to it, and
here are the numbers".

                         Linus

  parent reply index

Thread overview: 246+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-12-25  0:17 Crypto Update for 2.6.29 Herbert Xu
2008-12-25  0:20 ` Herbert Xu
2009-03-24  4:49   ` Crypto Update for 2.6.30 Herbert Xu
     [not found]   ` <20090324044932.GA18245@gondor.apana.org.au>
2009-04-02  6:14     ` Herbert Xu
2009-05-17 22:28       ` Herbert Xu
2009-05-31 13:12         ` Herbert Xu
2009-06-13  2:05     ` Crypto Update for 2.6.31 Herbert Xu
2009-06-21 14:09       ` Crypto Fixes " Herbert Xu
2009-09-02 22:03         ` Herbert Xu
2009-09-10 14:19       ` Crypto Update for 2.6.32 Herbert Xu
     [not found]       ` <20090910141905.GA17948@gondor.apana.org.au>
2009-10-20  6:54         ` Crypto Fixes " Herbert Xu
2009-10-20  7:26           ` Herbert Xu
2009-11-23 12:05             ` Herbert Xu
2009-12-30  2:12           ` Crypto Fixes for 2.6.33 Herbert Xu
2010-02-01 19:52             ` Herbert Xu
     [not found]             ` <20100201195204.GA6953@gondor.apana.org.au>
2010-03-05  7:10               ` Crypto Fixes for 2.6.34 Herbert Xu
     [not found]               ` <20100305071043.GA3548@gondor.apana.org.au>
2010-04-27 13:55                 ` Herbert Xu
2010-06-03 10:05                   ` Crypto Fixes for 2.6.35 Herbert Xu
2010-06-03 16:26                     ` Linus Torvalds
2010-06-03 21:56                       ` Herbert Xu
2010-07-16  2:26                     ` Herbert Xu
2010-07-22  5:50                       ` Herbert Xu
2010-07-23  5:17                         ` Lee Nipper
2010-07-23  7:27                           ` Herbert Xu
2010-07-23 13:17                             ` Lee Nipper
2010-09-03  6:00                         ` Herbert Xu
2010-09-03 11:07                           ` Crypto Fixes for 2.6.36 Herbert Xu
2010-12-15 11:50                             ` Crypto Fixes for 2.6.37 Herbert Xu
2010-12-15 20:40                               ` Linus Torvalds
2010-12-16  0:49                                 ` Herbert Xu
2010-12-16  0:58                                   ` Herbert Xu
2011-02-16  5:39                               ` Crypto Fixes for 2.6.38 Herbert Xu
     [not found]                               ` <20110216053911.GA10999@gondor.apana.org.au>
2011-03-28  7:13                                 ` Crypto Fixes for 2.6.39 Herbert Xu
2011-06-29 23:51                                   ` Crypto Fixes for 3.0 Herbert Xu
2011-10-21  8:22                                     ` Crypto Fixes for 3.1 Herbert Xu
2011-10-21  9:41                                       ` David Rientjes
2011-10-21 11:35                                         ` Herbert Xu
2011-11-10 23:00                                       ` Crypto Fixes for 3.2 Herbert Xu
2011-11-26  2:34                                         ` Herbert Xu
2012-01-26  2:43                                     ` Crypto Fixes for 3.3 Herbert Xu
2012-01-26  3:35                                       ` Linus Torvalds
2012-01-26  4:07                                         ` Herbert Xu
2012-01-26  4:16                                           ` Linus Torvalds
2012-02-14  3:35                                       ` Herbert Xu
2012-02-16  5:32                                         ` Herbert Xu
2012-03-03  5:36                                           ` Herbert Xu
2012-03-22  1:20                                       ` Crypto Fixes for 3.4 Herbert Xu
2012-04-02  9:45                                         ` Herbert Xu
2012-04-20 14:16                                           ` Herbert Xu
2012-06-11 13:00                                         ` Crypto Fixes for 3.5 Herbert Xu
2012-06-18  8:24                                           ` Herbert Xu
2012-08-23  8:32                                       ` Crypto Fixes for 3.6 Herbert Xu
2012-09-11  4:10                                         ` Herbert Xu
2012-11-09  9:30                                         ` Crypto Fixes for 3.7 Herbert Xu
2013-03-28  8:28                                           ` Crypto Fixes for 3.9 Herbert Xu
2013-03-28 13:05                                             ` Chaoxing Lin
2013-03-28 13:52                                               ` Herbert Xu
2013-04-10  2:21                                             ` Herbert Xu
2013-04-22  0:34                                               ` Herbert Xu
2013-05-28  5:52                                             ` Crypto Fixes for 3.10 Herbert Xu
2013-06-10  9:05                                               ` Herbert Xu
2013-06-20 13:29                                                 ` Herbert Xu
2013-06-27 13:02                                                   ` Herbert Xu
2013-07-24  7:23                                             ` Crypto Fixes for 3.11 Herbert Xu
2013-09-13 11:30                                             ` Crypto Fixes for 3.12 Herbert Xu
2013-09-13 14:22                                               ` Linus Torvalds
2013-09-13 14:39                                                 ` Herbert Xu
2013-12-03 12:41                                             ` Crypto Fixes for 3.13 Herbert Xu
2013-12-09 11:57                                               ` Herbert Xu
2014-01-01  6:10                                                 ` Herbert Xu
2014-02-03 12:59                                                   ` Crypto Fixes for 3.14 Herbert Xu
2014-04-13 23:34                                                     ` Crypto Fixes for 3.15 Herbert Xu
2014-05-13 11:02                                                       ` Herbert Xu
2014-05-21 12:22                                                         ` Herbert Xu
2014-07-10  9:03                                                     ` Crypto Fixes for 3.16 Herbert Xu
2014-07-18 10:57                                                       ` Herbert Xu
2014-07-28 14:05                                                         ` Herbert Xu
2014-07-31 13:59                                                           ` Herbert Xu
2014-09-15 11:35                                                       ` Crypto Fixes for 3.17 Herbert Xu
2014-09-24 13:27                                                         ` Herbert Xu
2014-11-10  8:57                                                           ` Crypto Fixes for 3.18 Herbert Xu
2014-12-31  3:32                                                     ` Crypto Fixes for 3.19 Herbert Xu
2015-01-07  2:17                                                       ` Herbert Xu
2015-01-20  0:52                                                         ` Herbert Xu
2015-03-09  5:19                                                         ` Crypto Fixes for 4.0 Herbert Xu
2015-03-18  5:25                                                           ` Herbert Xu
2015-03-18 18:12                                                             ` Linus Torvalds
2015-04-25  8:03                                                         ` Crypto Fixes for 4.1 Herbert Xu
2015-05-05 10:06                                                           ` Herbert Xu
2015-05-11  5:56                                                             ` Herbert Xu
2015-05-20  6:54                                                               ` Herbert Xu
2015-05-22  4:05                                                                 ` Herbert Xu
2015-05-22 21:29                                                                   ` Linus Torvalds
2015-05-22 21:39                                                                     ` Herbert Xu
2015-05-26  8:43                                                                   ` Herbert Xu
2015-06-18  3:43                                                                     ` Herbert Xu
2010-09-04 10:45                           ` Crypto Fixes for 2.6.35 Chuck Ebbert
2010-09-04 12:22                             ` Herbert Xu
2010-11-13 12:59               ` Crypto Fixes for 2.6.37 Herbert Xu
2009-12-04 13:55     ` Crypto Update for 2.6.33 Herbert Xu
2010-02-26  0:49       ` Crypto Update for 2.6.34 Herbert Xu
2010-03-01  7:50         ` tip: origin tree boot crash Ingo Molnar
2010-03-01 14:55           ` Steffen Klassert
2010-03-03 14:42             ` Herbert Xu
2010-03-04  3:00               ` Ingo Molnar
2010-03-04  5:31                 ` Herbert Xu
2010-05-19  2:06         ` Crypto Update for 2.6.35 Herbert Xu
2010-05-21 10:44           ` Herbert Xu
2010-08-04 14:04             ` Crypto Update for 2.6.36 Herbert Xu
2010-10-24  6:16               ` Crypto Update for 2.6.37 Herbert Xu
     [not found]               ` <20101024061625.GA23715@gondor.apana.org.au>
2011-01-06  0:01                 ` Crypto Update for 2.6.38 Herbert Xu
2011-01-06 18:05                   ` Linus Torvalds
2011-01-06 21:16                     ` Herbert Xu
2011-01-06 21:23                       ` Linus Torvalds
2011-01-06 21:39                         ` Herbert Xu
2011-01-06 22:13                           ` Linus Torvalds
2011-01-06 22:30                             ` Herbert Xu
2011-01-06 22:33                               ` David Miller
2011-01-06 22:43                               ` Linus Torvalds [this message]
2011-01-06 22:53                                 ` Herbert Xu
2011-01-06 23:25                                   ` Linus Torvalds
2011-01-07  0:14                                     ` Herbert Xu
2011-01-07  2:43                                       ` David Miller
2011-01-07  3:04                                         ` Herbert Xu
2011-01-07  2:39                                   ` Pavel Roskin
2011-01-07  3:03                                     ` Herbert Xu
2011-01-07 12:04                             ` Neil Horman
2011-01-08 13:23                               ` Nikos Mavrogiannopoulos
2011-01-10 12:03                                 ` Neil Horman
2011-01-10 19:05                                   ` Dag Arne Osvik
2011-01-06 21:46                       ` Pavel Roskin
2011-01-06 21:49                         ` Herbert Xu
2011-01-06 23:02                         ` Mihai Donțu
2011-01-13  1:44                   ` Herbert Xu
2011-03-15 14:59                   ` Crypto Update for 2.6.39 Herbert Xu
2011-05-20 23:54                     ` Crypto Update for 2.6.40 Herbert Xu
2011-07-24  1:17                       ` Crypto Update for 3.1 Herbert Xu
2011-10-31  4:09                         ` Crypto Update for 3.2 Herbert Xu
2011-10-31 16:42                           ` Randy Dunlap
2011-10-31 17:16                             ` Linus Torvalds
2011-11-01  3:48                               ` Herbert Xu
2012-01-06  4:12                           ` Crypto Update for 3.3 Herbert Xu
2012-01-11 22:19                             ` Herbert Xu
2012-03-20  3:27                             ` Herbert Xu
2012-05-23  1:35                               ` Crypto Update for 3.5 Herbert Xu
2012-05-23 23:06                                 ` Linus Torvalds
2012-05-24  0:21                                   ` Herbert Xu
2012-05-24  8:36                                     ` Arnd Bergmann
2012-05-24  7:03                                   ` Linus Walleij
2012-07-25  8:41                                 ` Crypto Update for 3.6 Herbert Xu
2012-10-04  9:53                             ` Crypto Update for 3.7 Herbert Xu
2012-12-14 10:31                               ` Crypto Update for 3.8 Herbert Xu
2013-02-23  2:33                                 ` Crypto Update for 3.9 Herbert Xu
2013-05-02  1:47                                   ` Crypto Update for 3.10 Herbert Xu
2013-07-05  9:52                                     ` Crypto Update for 3.11 Herbert Xu
2013-09-07  3:55                                   ` Crypto Update for 3.12 Herbert Xu
2013-11-07  8:01                                     ` Crypto Update for 3.13 Herbert Xu
2013-11-12 16:41                                       ` Herbert Xu
2013-11-12 16:59                                         ` Borislav Petkov
2013-11-12 18:27                                           ` Herbert Xu
2013-11-19  2:21                                         ` [GIT] " Herbert Xu
2013-11-23  1:34                                         ` Herbert Xu
2013-11-23  1:40                                           ` Herbert Xu
2014-01-23 11:53                                       ` Crypto Update for 3.14 Herbert Xu
2014-04-01 10:00                                         ` Crypto Update for 3.15 Herbert Xu
2014-06-05  6:23                                           ` Crypto Update for 3.16 Herbert Xu
2014-06-08  2:56                                             ` Linus Torvalds
2014-06-08  4:55                                               ` Herbert Xu
2014-06-09  1:47                                               ` Steven Miao
2014-08-04 13:03                                             ` Crypto Update for 3.17 Herbert Xu
2014-10-07 13:18                                               ` Crypto Update for 3.18 Herbert Xu
2014-12-11 12:51                                                 ` Crypto Update for 3.19 Herbert Xu
2014-12-12 11:54                                                   ` Herbert Xu
2015-02-14  9:43                                                   ` Crypto Update for 3.20 Herbert Xu
2015-04-15  3:39                                                     ` Crypto Update for 4.1 Herbert Xu
2015-04-16  1:58                                                       ` Linus Torvalds
2015-04-16  2:37                                                         ` Linus Torvalds
2015-04-16  2:38                                                           ` Linus Torvalds
2015-04-16  2:42                                                             ` Herbert Xu
2015-04-16  2:49                                                               ` Linus Torvalds
2015-04-16  3:07                                                                 ` Herbert Xu
2015-04-16  3:34                                                                   ` Linus Torvalds
2015-04-23 19:27                                                                     ` Bobby Powers
2015-04-23 20:10                                                                       ` Ard Biesheuvel
2015-04-23 21:35                                                                         ` Bobby Powers
2015-04-24  6:37                                                                           ` [PATCH] crypto: x86/sha512_ssse3 - fixup for asm function prototype change Ard Biesheuvel
2015-04-24 12:20                                                                             ` Herbert Xu
2015-06-22  8:44                                                       ` Crypto Update for 4.2 Herbert Xu
2015-06-23  4:26                                                         ` Linus Torvalds
2015-06-23  4:32                                                           ` Herbert Xu
2015-06-24  2:11                                                         ` Linus Torvalds
2015-06-24 13:29                                                           ` Herbert Xu
2015-08-31 13:56                                                         ` Crypto Update for 4.3 Herbert Xu
2015-11-02  8:04                                                           ` Crypto Update for 4.4 Herbert Xu
2016-01-11 10:14                                                             ` Crypto Update for 4.5 Herbert Xu
2016-01-22 10:18                                                               ` Crypto Fixes " Herbert Xu
2016-02-01  8:31                                                                 ` Herbert Xu
2016-02-09 17:54                                                                 ` Herbert Xu
2016-03-23 13:09                                                                 ` Crypto Fixes for 4.6 Herbert Xu
2016-03-30  9:11                                                                 ` Herbert Xu
2016-04-14  6:25                                                                   ` Herbert Xu
2016-04-25 11:12                                                                     ` Herbert Xu
2016-04-20  9:49                                                                   ` Herbert Xu
2016-05-09  8:46                                                                   ` Herbert Xu
2016-05-13  5:59                                                                 ` Herbert Xu
2016-05-20  8:41                                                                   ` Crypto Fixes for 4.7 Herbert Xu
2016-05-30  6:31                                                                     ` Herbert Xu
2016-06-27  6:28                                                                     ` Herbert Xu
2016-08-16  8:48                                                                       ` Crypto Fixes for 4.8 Herbert Xu
2016-07-22  3:39                                                                     ` Crypto Fixes for 4.7 Herbert Xu
2016-07-23  3:10                                                                       ` Herbert Xu
2016-08-01  9:58                                                                 ` Crypto Fixes for 4.8 Herbert Xu
2016-08-23  9:51                                                                   ` Herbert Xu
2016-08-31 14:19                                                                     ` Herbert Xu
2016-09-05  9:33                                                                   ` Herbert Xu
2016-09-13 10:35                                                                     ` Herbert Xu
2016-09-19 11:21                                                                     ` Herbert Xu
2016-09-23 14:48                                                                     ` Herbert Xu
2016-10-25  2:34                                                                   ` Crypto Fixes for 4.9 Herbert Xu
2016-03-15  7:20                                                               ` Crypto Update for 4.6 Herbert Xu
2016-05-16  7:16                                                                 ` Crypto Update for 4.7 Herbert Xu
2016-07-25 10:53                                                                   ` Crypto Update for 4.8 Herbert Xu
2016-10-10  3:34                                                                     ` Crypto Update for 4.9 Herbert Xu
2015-06-26 10:22                                                     ` Crypto Fixes for 4.2 Herbert Xu
2015-06-26 20:07                                                       ` Linus Torvalds
2015-06-27  6:56                                                         ` Herbert Xu
2015-06-27 16:40                                                           ` Linus Torvalds
2015-06-29  7:32                                                             ` Herbert Xu
2015-06-30 13:51                                                       ` Herbert Xu
2015-07-13  4:08                                                         ` Herbert Xu
2015-08-03  7:16                                                           ` Herbert Xu
2015-08-17  8:27                                                             ` Herbert Xu
2015-09-08  9:25                                                       ` Crypto Fixes for 4.3 Herbert Xu
2015-09-16 10:30                                                         ` Herbert Xu
2015-09-26 20:01                                                           ` Herbert Xu
2015-10-13 12:17                                                             ` Herbert Xu
2015-10-13 17:23                                                               ` Linus Torvalds
2015-10-14  1:03                                                                 ` Herbert Xu
2015-10-14  2:00                                                                   ` Linus Torvalds
2015-10-14  2:38                                                                     ` Herbert Xu
2015-10-26 11:02                                                         ` Herbert Xu
2015-11-11  7:08                                                           ` Crypto Fixes for 4.4 Herbert Xu
2015-11-17  9:41                                                             ` Herbert Xu
2015-12-05  1:04                                                             ` Herbert Xu
2015-12-14  9:29                                                               ` Herbert Xu
2015-12-28 13:26                                                             ` Herbert Xu

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