linux-kernel - Re: [PATCH RFC tip/core/rcu 0/5] Expedited grace periods encouraging normal ones

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]

Message-ID: <1435805445.6887.50.camel@gmail.com>
Date:	Thu, 02 Jul 2015 04:50:45 +0200
From:	Mike Galbraith <umgwanakikbuti@...il.com>
To:	paulmck@...ux.vnet.ibm.com
Cc:	josh@...htriplett.org, Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, mingo@...nel.org,
	laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	tglx@...utronix.de, rostedt@...dmis.org, dhowells@...hat.com,
	edumazet@...gle.com, dvhart@...ux.intel.com, fweisbec@...il.com,
	oleg@...hat.com, bobby.prani@...il.com
Subject: Re: [PATCH RFC tip/core/rcu 0/5] Expedited grace periods
 encouraging normal ones

On Wed, 2015-07-01 at 19:18 -0700, Paul E. McKenney wrote:

> Does their normal workload trigger the condition that results in the
> expedited grace period?  If so, do they use NO_HZ_FULL?

They're having no trouble that I'm aware of, and I definitely would be
made aware.  They're not currently using a kernel with NO_HZ_FULL even
built in, as that stuff is far far too raw in the current kernel.

They may meet a NO_HZ_FULL enabled kernel soonish, but will be told to
not turn it on for anything other than pure compute, as NO_HZ_FULL is
currently not usable for mixed load in partitioned box, much less rt. 

	-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/