linux-kernel - Re: [PATCH RFC nohz_full v2 2/7] nohz_full: Add rcu_dyntick data for scalable detection of all-idle state

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 02 Jul 2013 07:10:52 +0200
From:	Mike Galbraith <bitbucket@...ine.de>
To:	paulmck@...ux.vnet.ibm.com
Cc:	Josh Triplett <josh@...htriplett.org>,
	linux-kernel@...r.kernel.org, mingo@...e.hu, laijs@...fujitsu.com,
	dipankar@...ibm.com, akpm@...ux-foundation.org,
	mathieu.desnoyers@...ymtl.ca, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, dhowells@...hat.com,
	edumazet@...gle.com, darren@...art.com, fweisbec@...il.com,
	sbw@....edu
Subject: Re: [PATCH RFC nohz_full v2 2/7] nohz_full: Add rcu_dyntick data
 for scalable detection of all-idle state

On Mon, 2013-07-01 at 12:16 -0700, Paul E. McKenney wrote: 
> On Mon, Jul 01, 2013 at 11:34:13AM -0700, Josh Triplett wrote:

> > > > This also naturally raises the question "How can we let userspace get
> > > > accurate time without forcing a timer tick?".
> > > 
> > > We don't.  ;-)
> > 
> > We don't currently, hence my question about how we can. :)
> 
> Per-CPU atomic clocks?

Great idea, who needs timekeeping code. 

http://www.euronews.com/2013/04/02/swiss-sets-sights-on-miniscule-atomic-clock/

-Mike

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/