linux-kernel - [PATCH 0/2] [GIT PULL] sched: fixes for rt-migration-test failures

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Date:	Wed, 29 Jul 2009 00:21:21 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	linux-kernel@...r.kernel.org
Cc:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Gregory Haskins <gregory.haskins@...il.com>
Subject: [PATCH 0/2] [GIT PULL] sched: fixes for rt-migration-test failures

Ingo,

We've been experiencing rt-migration-test failures

 http://rostedt.homelinux.com/code/rt-migrate-test.c

Gregory Haskins and myself have been debugging this for several days.
We found three bugs so far in the code that causes the failure
of this test. The failure is that an RT task may not migrate
properly and may wait behind a lower RT prio task for the migration.

These two patches solve two of the bugs. There's also a bug that
is triggered with RT_GROUP scheduling that we will look at later.

The test can still fail after a long time running and we are still
looking into other issues. But for now this solves two of those
issues.

Please pull the latest update tree, which can be found at:

  git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace.git
update

Steven Rostedt (2):
      sched: check for pushing rt tasks after all scheduling
      sched: add new prio to cpupri before removing old prio

----
 kernel/sched.c        |   38 +++++++++++++++++++++++++++-----------
 kernel/sched_cpupri.c |   30 ++++++++++++++++--------------
 2 files changed, 43 insertions(+), 25 deletions(-)
-- 
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