LKML Archive on lore.kernel.org
 help / color / Atom feed
From: tcharding <me@tobin.cc>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Randy Dunlap <rdunlap@infradead.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Kees Cook <keescook@chromium.org>,
	Anna-Maria Gleixner <anna-maria@linutronix.de>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Hashed pointer issues
Date: Tue, 1 May 2018 17:05:21 +1000
Message-ID: <20180501070521.GA3791@eros> (raw)
In-Reply-To: <CA+55aFzezp7OCpK7HFFQ7LeUZZyFACrhx6px_ZFq5zgoNTwEVw@mail.gmail.com>

On Mon, Apr 30, 2018 at 05:12:05PM +0000, Linus Torvalds wrote:
> On Mon, Apr 30, 2018 at 10:06 AM Randy Dunlap <rdunlap@infradead.org> wrote:
> > On 04/30/2018 10:01 AM, Linus Torvalds wrote:
> > >
> > > No kernel command line needed in practice any more. That's assuming any
> > > kernel developer will have an IvyBridge or newer.
> 
> > any paid kernel developer :)
> 
> I suspect a lot of hobbyists too - it's not like ivy bridge is particularly
> new.
> 
> But if not, we can burn that bridge when we get to it.
> 
> Also, if you're not paid to do it, I don't think you'll be working a lot of
> error trace buffers during bootup. There are definitely more interesting
> parts of the kernel to play with ;)

Turns out my desktop (dev) machine is pretty old. RDRAND is only
available on 'newer' Core i5  

	"Intel Secure Key was added in Broadwell, so you need that or any later
	generation. Broadwell generation means Intel Core i5 or i7 where the
	4-digit number appended to it starts with a "5"."

	https://superuser.com/questions/999515/what-instruction-set-architecture-isa-is-rdrand-and-rdseed-part-of


Lucky the laptop is newer, RDRAND is supported on core M5Y70.


	Tobin

  reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-30 15:50 Anna-Maria Gleixner
2018-04-30 16:11 ` Kees Cook
2018-04-30 16:31   ` Linus Torvalds
2018-04-30 16:41     ` Steven Rostedt
2018-04-30 16:57       ` Linus Torvalds
2018-04-30 17:01         ` Linus Torvalds
2018-04-30 17:06           ` Randy Dunlap
2018-04-30 17:12             ` Linus Torvalds
2018-05-01  7:05               ` tcharding [this message]
2018-05-03  8:41             ` Geert Uytterhoeven
2018-04-30 18:38           ` Kees Cook
2018-04-30 19:00             ` Linus Torvalds
2018-04-30 19:16               ` Kees Cook
2018-04-30 20:01                 ` Linus Torvalds
2018-04-30 20:07                   ` Linus Torvalds
2018-04-30 21:23                 ` Tobin C. Harding

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20180501070521.GA3791@eros \
    --to=me@tobin.cc \
    --cc=anna-maria@linutronix.de \
    --cc=keescook@chromium.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=rdunlap@infradead.org \
    --cc=rostedt@goodmis.org \
    --cc=torvalds@linux-foundation.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

LKML Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/lkml/0 lkml/git/0.git
	git clone --mirror https://lore.kernel.org/lkml/1 lkml/git/1.git
	git clone --mirror https://lore.kernel.org/lkml/2 lkml/git/2.git
	git clone --mirror https://lore.kernel.org/lkml/3 lkml/git/3.git
	git clone --mirror https://lore.kernel.org/lkml/4 lkml/git/4.git
	git clone --mirror https://lore.kernel.org/lkml/5 lkml/git/5.git
	git clone --mirror https://lore.kernel.org/lkml/6 lkml/git/6.git
	git clone --mirror https://lore.kernel.org/lkml/7 lkml/git/7.git
	git clone --mirror https://lore.kernel.org/lkml/8 lkml/git/8.git
	git clone --mirror https://lore.kernel.org/lkml/9 lkml/git/9.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 lkml lkml/ https://lore.kernel.org/lkml \
		linux-kernel@vger.kernel.org
	public-inbox-index lkml

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-kernel


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git