From: "Theodore Ts'o" <tytso@mit.edu>
To: Tony Luck <tony.luck@intel.com>
Cc: linux-kernel@vger.kernel.org, torvalds@linux-foundation.org,
w@1wt.eu, ewust@umich.edu, zakir@umich.edu, greg@kroah.com,
mpm@selenic.com, nadiah@cs.ucsd.edu, jhalderm@umich.edu,
tglx@linutronix.de, davem@davemloft.net
Subject: Re: [PATCH] dmi: Feed DMI table to /dev/random driver
Date: Fri, 20 Jul 2012 22:02:58 -0400 [thread overview]
Message-ID: <20120721020258.GA12898@thunk.org> (raw)
In-Reply-To: <CA+8MBbKroxc1p8+QOhEd6+gn2BD4ymcS7n7SOMR2=aiMW8waqA@mail.gmail.com>
On Fri, Jul 20, 2012 at 06:19:33PM -0700, Tony Luck wrote:
> On Fri, Jul 20, 2012 at 5:56 PM, Theodore Ts'o <tytso@mit.edu> wrote:
> > The other approach was to add some new interface that random.c would
> > call which would grab the dmi data from rand_initialize(). But that's
> > going to be a lot more complicated, so I guess we should go with the
> > simple/stupid approach.
>
> It wouldn't be all that hard ... we'd just need to add a new entry point
> to the dmi codefor random to call (and a stub somewhere so that
> CONFIG_DMI=n kernels still build). But getting some per-platform
> data into the random pools earlier is a good thing ... it means that
> users of random data will see the benefit earlier than they do now.
Yeah, what makes it tricky is if we wanted to do things in an arch
independent way, since I assume there are architectures out there
which have something which has the same sort of information as the DMI
tables, but which would be something else. So we'd need to have some
interface which could be defined by each architecture, and a no-op
function for architectures that didn't provide such a thing.
> So add the big fat comment so that people know not to break this
> useful (if not entirely intentional) functionality.
I agree. Want to send a revised patch with the comment, and I'll drop
it into the random.git tree?
Thanks,
- Ted
next prev parent reply other threads:[~2012-07-21 2:03 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-05 18:12 [PATCH 00/10] /dev/random fixups Theodore Ts'o
2012-07-05 18:12 ` [PATCH 01/10] random: make 'add_interrupt_randomness()' do something sane Theodore Ts'o
2012-07-05 18:47 ` Matt Mackall
2012-07-05 18:52 ` Linus Torvalds
2012-07-05 21:39 ` Matt Mackall
2012-07-05 21:47 ` Linus Torvalds
2012-07-05 22:00 ` Theodore Ts'o
2012-07-05 22:21 ` Linus Torvalds
2012-07-05 22:31 ` Matt Mackall
2012-07-05 22:35 ` Linus Torvalds
2012-07-05 23:21 ` Theodore Ts'o
2012-07-06 2:59 ` Linus Torvalds
2012-07-06 13:01 ` Theodore Ts'o
2012-07-06 16:24 ` Linus Torvalds
2012-07-06 16:52 ` Theodore Ts'o
2012-07-09 19:15 ` Matt Mackall
2012-07-25 18:43 ` Thomas Gleixner
[not found] ` <CAGsuqq2MWuFnY7PMb_2ddBNNJr80xB_JW+Wryq3mhhmQuEojpg@mail.gmail.com>
2012-07-06 21:59 ` Theodore Ts'o
2012-07-05 18:12 ` [PATCH 02/10] random: use lockless techniques when mixing entropy pools Theodore Ts'o
2012-07-05 18:18 ` Linus Torvalds
2012-07-05 18:19 ` Greg KH
2012-07-05 23:09 ` Theodore Ts'o
2012-07-05 19:10 ` Matt Mackall
2012-07-05 19:47 ` Theodore Ts'o
2012-07-05 20:45 ` Matt Mackall
2012-07-05 18:12 ` [PATCH 03/10] random: create add_device_randomness() interface Theodore Ts'o
2012-07-05 18:12 ` [PATCH 04/10] usb: feed USB device information to the /dev/random driver Theodore Ts'o
2012-07-05 18:12 ` [PATCH 05/10] net: feed /dev/random with the MAC address when registering a device Theodore Ts'o
2012-07-05 18:12 ` [PATCH 06/10] random: use the arch-specific rng in xfer_secondary_pool Theodore Ts'o
2012-07-05 18:49 ` Linus Torvalds
2012-07-05 18:12 ` [PATCH 07/10] random: add new get_random_bytes_arch() function Theodore Ts'o
2012-07-05 18:35 ` Linus Torvalds
2012-07-05 19:50 ` Theodore Ts'o
2012-07-05 21:45 ` Matt Mackall
2012-07-25 3:37 ` H. Peter Anvin
2012-07-25 7:22 ` Ingo Molnar
2012-07-25 15:10 ` Theodore Ts'o
2012-07-25 15:19 ` H. Peter Anvin
2012-07-25 17:37 ` [PATCH] random: mix in architectural randomness in extract_buf() H. Peter Anvin
2012-07-25 23:50 ` Ben Hutchings
2012-07-26 0:32 ` H. Peter Anvin
2012-07-28 2:39 ` Theodore Ts'o
2012-07-28 2:48 ` H. Peter Anvin
2012-07-26 3:16 ` [PATCH 07/10] random: add new get_random_bytes_arch() function H. Peter Anvin
2012-07-26 3:24 ` H. Peter Anvin
2012-07-05 18:12 ` [PATCH 08/10] random: unify mix_pool_bytes() and mix_pool_bytes_entropy() Theodore Ts'o
2012-07-05 18:12 ` [PATCH 09/10] random: add tracepoints for easier debugging and verification Theodore Ts'o
2012-07-05 18:12 ` [PATCH 10/10] MAINTAINERS: Theodore Ts'o is taking over the random driver Theodore Ts'o
2012-07-06 11:40 ` [PATCH 00/10] /dev/random fixups Fengguang Wu
2012-07-06 12:44 ` Theodore Ts'o
2012-07-20 20:15 ` [PATCH] dmi: Feed DMI table to /dev/random driver Tony Luck
2012-07-20 21:03 ` Matt Mackall
2012-07-21 0:56 ` Theodore Ts'o
2012-07-21 1:19 ` Tony Luck
2012-07-21 2:02 ` Theodore Ts'o [this message]
2012-07-23 16:47 ` [PATCH] random: Add comment to random_initialize() Tony Luck
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