linux-kernel - Re: [PATCH v2 0/6] Series short description

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Date:	Wed, 27 Aug 2008 10:33:24 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Gregory Haskins <ghaskins@...ell.com>
Cc:	mingo@...e.hu, srostedt@...hat.com, linux-kernel@...r.kernel.org,
	linux-rt-users@...r.kernel.org, npiggin@...e.de,
	gregory.haskins@...il.com
Subject: Re: [PATCH v2 0/6] Series short description

On Tue, 2008-08-26 at 13:34 -0400, Gregory Haskins wrote:
> Hi Ingo,
> 
> The following repositories
> 
>      git://git.kernel.org/pub/scm/linux/kernel/git/ghaskins/linux-2.6-hacks.git tip/sched/devel/rtbalance 
> 
>      ftp://ftp.novell.com/dev/ghaskins/tip-rt-fixes.tar.bz2
> 
> apply to tip/sched/devel to pick up fixes for the RT scheduler. 
> 
> [
> 	Changelog:
> 	
> 	v2: 
> 	    *) predicated newidle and double_lock changes on
> 	       CONFIG_PREEMPT to address a concern by Nick Piggin
> 
> 	    *) fixed a build issue when DEBUG_PI_LIST is defined 
> 
> 	v1:
> 	    *) initial release
> ]
> 
> These patches were developed in the interest of shorting latencies in
> PREEMPT_RT, but they apply to the mainline scheduler as well, so I am
> offering them here first.
> 
> This has been tested under both 26.3-rt3 and tip/sched/devel on x86_64 for
> both CONFIG_SMP and !CONFIG_SMP.
> 
> Comments/bug-fixes welcome!

Looks good to me,

Acked-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>

Ingo please consider.

> ---
> 
> Gregory Haskins (6):
>       sched: create "pushable_tasks" list to limit pushing to one attempt
>       plist: fix PLIST_NODE_INIT to work with debug enabled
>       sched: add sched_class->needs_post_schedule() member
>       sched: make double-lock-balance fair
>       sched: pull only one task during NEWIDLE balancing to limit critical section
>       sched: only try to push a task on wakeup if it is migratable
> 
> 
>  include/linux/init_task.h |    1 
>  include/linux/plist.h     |    9 ++-
>  include/linux/sched.h     |    2 +
>  kernel/sched.c            |   84 ++++++++++++++++++++++++---
>  kernel/sched_rt.c         |  139 ++++++++++++++++++++++++++++++++++++++-------
>  5 files changed, 202 insertions(+), 33 deletions(-)
> 
> 

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