linux-kernel - Re: [PATCH v2 0/6] sched: misc rt fixes for tip/sched/devel (was: Series short description)

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Message-ID: <48B4486A.1010308@novell.com>
Date:	Tue, 26 Aug 2008 14:16:10 -0400
From:	Gregory Haskins <ghaskins@...ell.com>
To:	mingo@...e.hu
CC:	srostedt@...hat.com, peterz@...radead.org,
	linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org,
	npiggin@...e.de, gregory.haskins@...il.com
Subject: Re: [PATCH v2 0/6] sched: misc rt fixes for tip/sched/devel (was:
 Series short description)

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. 
>   

[ It would help if I remembered to rename the default subject ;) ]

I just wanted to add that these are not urgent fixes.  .28 at the
earliest.  Thanks

-Greg

> [
> 	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!
>
> Regards,
> -Greg
>
>
> ---
>
> 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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>   



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