linux-toradex.git/include/uapi/linux/sched.h, branch v5.1-rc1

sched/deadline: Implement "runtime overrun signal" support

2018-01-10T10:30:31+00:00

This patch adds the possibility of getting the delivery of a SIGXCPU
signal whenever there is a runtime overrun. The request is done through
the sched_flags field within the sched_attr structure.

Forward port of https://lkml.org/lkml/2009/10/16/170

Tested-by: Mathieu Poirier 
Signed-off-by: Juri Lelli 
Signed-off-by: Claudio Scordino 
Signed-off-by: Luca Abeni 
Signed-off-by: Peter Zijlstra (Intel) 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: Tommaso Cucinotta 
Link: http://lkml.kernel.org/r/1513077024-25461-1-git-send-email-claudio@evidence.eu.com
Signed-off-by: Ingo Molnar

License cleanup: add SPDX license identifier to uapi header files with no license

2017-11-02T10:19:54+00:00

Many user space API headers are missing licensing information, which
makes it hard for compliance tools to determine the correct license.

By default are files without license information under the default
license of the kernel, which is GPLV2.  Marking them GPLV2 would exclude
them from being included in non GPLV2 code, which is obviously not
intended. The user space API headers fall under the syscall exception
which is in the kernels COPYING file:

   NOTE! This copyright does *not* cover user programs that use kernel
   services by normal system calls - this is merely considered normal use
   of the kernel, and does *not* fall under the heading of "derived work".

otherwise syscall usage would not be possible.

Update the files which contain no license information with an SPDX
license identifier.  The chosen identifier is 'GPL-2.0 WITH
Linux-syscall-note' which is the officially assigned identifier for the
Linux syscall exception.  SPDX license identifiers are a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.  See the previous patch in this series for the
methodology of how this patch was researched.

Reviewed-by: Kate Stewart 
Reviewed-by: Philippe Ombredanne 
Reviewed-by: Thomas Gleixner 
Signed-off-by: Greg Kroah-Hartman

sched/deadline: Make GRUB a task's flag

2017-06-08T08:31:52+00:00

This patch introduces the SCHED_FLAG_RECLAIM flag to specify
that a DL task is allowed to reclaim unused CPU time (using
the GRUB algorithm).

Tested-by: Daniel Bristot de Oliveira 
Signed-off-by: Luca Abeni 
Signed-off-by: Peter Zijlstra (Intel) 
Cc: Claudio Scordino 
Cc: Joel Fernandes 
Cc: Juri Lelli 
Cc: Linus Torvalds 
Cc: Mathieu Poirier 
Cc: Mike Galbraith 
Cc: Peter Zijlstra 
Cc: Steven Rostedt 
Cc: Thomas Gleixner 
Cc: Tommaso Cucinotta 
Link: http://lkml.kernel.org/r/1495138417-6203-7-git-send-email-luca.abeni@santannapisa.it
Signed-off-by: Ingo Molnar

sched: new clone flag CLONE_NEWCGROUP for cgroup namespace

2016-02-16T18:04:58+00:00

CLONE_NEWCGROUP will be used to create new cgroup namespace.

Signed-off-by: Aditya Kali 
Signed-off-by: Serge Hallyn 
Signed-off-by: Tejun Heo

sched: Update comments about CLONE_NEWUTS and CLONE_NEWIPC

2014-11-16T09:58:53+00:00

Remove question mark:

 s/New utsname group?/New utsname namespace

Unified style for IPC:

 s/New ipcs/New ipc namespace

Signed-off-by: Chen Hanxiao 
Acked-by: Serge E. Hallyn 
Signed-off-by: Peter Zijlstra (Intel) 
Cc: Jiri Kosina 
Cc: Linus Torvalds 
Cc: linux-api@vger.kernel.org
Link: http://lkml.kernel.org/r/1415091082-15093-1-git-send-email-chenhanxiao@cn.fujitsu.com
Signed-off-by: Ingo Molnar

sched: Update comments for CLONE_NEWNS

2014-10-28T09:46:08+00:00

Signed-off-by: Chen Hanxiao 
Acked-by: Serge E. Hallyn 
Signed-off-by: Peter Zijlstra (Intel) 
Cc: Linus Torvalds 
Cc: linux-api@vger.kernel.org
Link: http://lkml.kernel.org/r/1412674147-8941-1-git-send-email-chenhanxiao@cn.fujitsu.com
Signed-off-by: Ingo Molnar

sched: Move SCHED_RESET_ON_FORK into attr::sched_flags

2014-01-16T08:27:17+00:00

I noticed the new sched_{set,get}attr() calls didn't properly deal
with the SCHED_RESET_ON_FORK hack.

Instead of propagating the flags in high bits nonsense use the brand
spanking new attr::sched_flags field.

Signed-off-by: Peter Zijlstra 
Cc: Juri Lelli 
Cc: Dario Faggioli 
Link: http://lkml.kernel.org/r/20140115162242.GJ31570@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar

sched/deadline: Add SCHED_DEADLINE structures & implementation

2014-01-13T12:41:06+00:00

Introduces the data structures, constants and symbols needed for
SCHED_DEADLINE implementation.

Core data structure of SCHED_DEADLINE are defined, along with their
initializers. Hooks for checking if a task belong to the new policy
are also added where they are needed.

Adds a scheduling class, in sched/dl.c and a new policy called
SCHED_DEADLINE. It is an implementation of the Earliest Deadline
First (EDF) scheduling algorithm, augmented with a mechanism (called
Constant Bandwidth Server, CBS) that makes it possible to isolate
the behaviour of tasks between each other.

The typical -deadline task will be made up of a computation phase
(instance) which is activated on a periodic or sporadic fashion. The
expected (maximum) duration of such computation is called the task's
runtime; the time interval by which each instance need to be completed
is called the task's relative deadline. The task's absolute deadline
is dynamically calculated as the time instant a task (better, an
instance) activates plus the relative deadline.

The EDF algorithms selects the task with the smallest absolute
deadline as the one to be executed first, while the CBS ensures each
task to run for at most its runtime every (relative) deadline
length time interval, avoiding any interference between different
tasks (bandwidth isolation).
Thanks to this feature, also tasks that do not strictly comply with
the computational model sketched above can effectively use the new
policy.

To summarize, this patch:
 - introduces the data structures, constants and symbols needed;
 - implements the core logic of the scheduling algorithm in the new
   scheduling class file;
 - provides all the glue code between the new scheduling class and
   the core scheduler and refines the interactions between sched/dl
   and the other existing scheduling classes.

Signed-off-by: Dario Faggioli 
Signed-off-by: Michael Trimarchi 
Signed-off-by: Fabio Checconi 
Signed-off-by: Juri Lelli 
Signed-off-by: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1383831828-15501-4-git-send-email-juri.lelli@gmail.com
Signed-off-by: Ingo Molnar

UAPI: (Scripted) Disintegrate include/linux

2012-10-13T09:46:48+00:00

Signed-off-by: David Howells 
Acked-by: Arnd Bergmann 
Acked-by: Thomas Gleixner 
Acked-by: Michael Kerrisk 
Acked-by: Paul E. McKenney 
Acked-by: Dave Jones