linux-kernel - [PATCH v3 0/3] Fix shutdown of cpu which having throttled rq

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Message-ID: <1403684374.3462.41.camel@tkhai>
Date:	Wed, 25 Jun 2014 12:19:34 +0400
From:	Kirill Tkhai <ktkhai@...allels.com>
To:	<linux-kernel@...r.kernel.org>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>, <tkhai@...dex.ru>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	"Mike Galbraith" <umgwanakikbuti@...il.com>,
	<khorenko@...allels.com>, Ben Segall <bsegall@...gle.com>,
	Paul Turner <pjt@...gle.com>
Subject: [PATCH v3 0/3] Fix shutdown of cpu which having throttled rq


This is a result of discussion "[PATCH 1/2] sched: Rework migrate_tasks()":

        https://lkml.org/lkml/2014/6/11/166

The problem is cfs_rq and rt_rq may stay throttled in the moment
of task migration from dead cpu. This patch fixes that for fair
and RT classes. No fix for deadline class yet, it's coming soon.

v2: [1/3]Collision with tg_set_cfs_bandwidth() found by Ben Segall.
         Code movement.
	 {get,put}_online_cpus synchronization by Ben Segall

---

Kirill Tkhai (3):
      sched/fair: Disable runtime_enabled on dying rq
      sched/rt: __disable_runtime: Enqueue just unthrottled rt_rq back on the stack
      sched: Rework check_for_tasks()


 kernel/cpu.c        |   33 ++++++++++++++++++++-------------
 kernel/sched/core.c |    8 +++++++-
 kernel/sched/fair.c |   22 ++++++++++++++++++++++
 kernel/sched/rt.c   |    3 +++
 4 files changed, 52 insertions(+), 14 deletions(-)

--
Signed-off-by: Kirill Tkhai <ktkhai@...allels.com>


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