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From: Christoph Lameter <cl@linux.com>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Avi Kivity <avi@redhat.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Gilad Ben-Yossef <gilad@benyossef.com>,
	linux-kernel@vger.kernel.org, Chris Metcalf <cmetcalf@tilera.com>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	linux-mm@kvack.org, Pekka Enberg <penberg@kernel.org>,
	Matt Mackall <mpm@selenic.com>,
	Sasha Levin <levinsasha928@gmail.com>,
	Rik van Riel <riel@redhat.com>, Andi Kleen <andi@firstfloor.org>,
	Mel Gorman <mel@csn.ul.ie>,
	Andrew Morton <akpm@linux-foundation.org>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Michal Nazarewicz <mina86@mina86.com>,
	Kosaki Motohiro <kosaki.motohiro@gmail.com>,
	Milton Miller <miltonm@bga.com>
Subject: Re: [v7 0/8] Reduce cross CPU IPI interference
Date: Thu, 2 Feb 2012 11:25:51 -0600 (CST)	[thread overview]
Message-ID: <alpine.DEB.2.00.1202021124520.6338@router.home> (raw)
In-Reply-To: <20120202170134.GM2518@linux.vnet.ibm.com>

On Thu, 2 Feb 2012, Paul E. McKenney wrote:

> Frederic's work checks to see if there is only one runnable user task
> on a given CPU.  If there is only one, then the scheduling-clock interrupt
> is turned off for that CPU, and RCU is told to ignore it while it is
> executing in user space.  Not sure whether this covers KVM guests.
>
> In any case, this is not yet in mainline.

Sounds great. Is there any plan on when to merge it? Where are the most up
to date patches vs mainstream?


  parent reply	other threads:[~2012-02-02 17:25 UTC|newest]

Thread overview: 77+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-26 10:01 [v7 0/8] Reduce cross CPU IPI interference Gilad Ben-Yossef
2012-01-26 10:01 ` [v7 1/8] smp: introduce a generic on_each_cpu_mask function Gilad Ben-Yossef
2012-01-29 12:24   ` Gilad Ben-Yossef
2012-01-30 21:52     ` Andrew Morton
2012-01-31  6:33       ` Gilad Ben-Yossef
2012-01-26 10:01 ` [v7 2/8] arm: move arm over to generic on_each_cpu_mask Gilad Ben-Yossef
2012-01-26 10:01 ` [v7 3/8] tile: move tile to use " Gilad Ben-Yossef
2012-01-26 10:01 ` [v7 4/8] smp: add func to IPI cpus based on parameter func Gilad Ben-Yossef
2012-01-27 23:57   ` Andrew Morton
2012-01-29 12:04     ` Gilad Ben-Yossef
2012-01-26 10:01 ` [v7 5/8] slub: only IPI CPUs that have per cpu obj to flush Gilad Ben-Yossef
2012-01-26 15:09   ` Christoph Lameter
2012-01-26 10:01 ` [v7 6/8] fs: only send IPI to invalidate LRU BH when needed Gilad Ben-Yossef
2012-01-26 10:02 ` [v7 7/8] mm: only IPI CPUs to drain local pages if they exist Gilad Ben-Yossef
2012-01-26 15:13   ` Christoph Lameter
2012-01-28  0:12   ` Andrew Morton
2012-01-29 12:18     ` Gilad Ben-Yossef
2012-01-30 21:49       ` Andrew Morton
2012-01-31  6:32         ` Gilad Ben-Yossef
2012-01-30 14:59   ` Mel Gorman
2012-01-30 15:14     ` Gilad Ben-Yossef
2012-01-30 15:44       ` Mel Gorman
2012-01-26 10:02 ` [v7 8/8] mm: add vmstat counters for tracking PCP drains Gilad Ben-Yossef
2012-01-26 15:19 ` [v7 0/8] Reduce cross CPU IPI interference Peter Zijlstra
2012-01-29  8:25   ` Gilad Ben-Yossef
2012-02-01 17:04     ` Frederic Weisbecker
2012-02-02  8:46       ` Gilad Ben-Yossef
2012-02-02 15:41         ` Chris Metcalf
2012-02-05 11:46           ` Gilad Ben-Yossef
2012-02-10 18:39             ` Peter Zijlstra
2012-02-10 20:13               ` Gilad Ben-Yossef
2012-02-10 20:29                 ` Peter Zijlstra
2012-02-10 20:39                   ` Gilad Ben-Yossef
2012-02-10 18:33           ` Peter Zijlstra
2012-02-10 20:33             ` Gilad Ben-Yossef
2012-02-15 21:50             ` Chris Metcalf
2012-02-15 22:15               ` Christoph Lameter
2012-02-15 23:44                 ` Chris Metcalf
2012-02-21  1:34               ` Frederic Weisbecker
2012-03-01 18:27                 ` Chris Metcalf
2012-02-10 18:38           ` Peter Zijlstra
2012-02-10 20:24             ` Gilad Ben-Yossef
2012-02-15 15:11               ` Peter Zijlstra
2012-02-15 15:19                 ` Gilad Ben-Yossef
2012-02-15 21:51               ` Chris Metcalf
2012-02-02 16:24         ` Frederic Weisbecker
2012-02-02 16:29           ` Christoph Lameter
2012-02-09 15:52             ` Frederic Weisbecker
2012-02-09 15:59               ` Chris Metcalf
2012-02-09 18:11                 ` Frederic Weisbecker
2012-02-09 16:26               ` Christoph Lameter
2012-02-09 18:32                 ` Frederic Weisbecker
2012-02-01 17:35     ` Peter Zijlstra
2012-02-01 17:57       ` Peter Zijlstra
2012-02-02  9:42         ` Gilad Ben-Yossef
2012-02-01 18:40       ` Paul E. McKenney
2012-02-01 20:06         ` Christoph Lameter
2012-02-01 20:13           ` Paul E. McKenney
2012-02-02  9:34             ` Avi Kivity
2012-02-02 15:34               ` Paul E. McKenney
2012-02-02 16:14                 ` Avi Kivity
2012-02-02 17:01                   ` Paul E. McKenney
2012-02-02 17:23                     ` Avi Kivity
2012-02-02 17:51                       ` Paul E. McKenney
2012-02-05 12:16                         ` Avi Kivity
2012-02-05 16:59                           ` Paul E. McKenney
2012-02-09 15:22                             ` Frederic Weisbecker
2012-02-09 16:05                               ` Avi Kivity
2012-02-09 18:22                                 ` Frederic Weisbecker
2012-02-09 23:41                                   ` Paul E. McKenney
2012-02-10  1:39                                     ` Frederic Weisbecker
2012-02-14 13:18                                       ` Avi Kivity
2012-02-21  0:02                                         ` Frederic Weisbecker
2012-02-02 17:25                     ` Christoph Lameter [this message]
2012-02-05 12:06                       ` Gilad Ben-Yossef
2012-02-06 18:19                         ` Christoph Lameter
2012-02-09 15:37                           ` Frederic Weisbecker

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