linux-toradex.git/kernel/kthread.c, branch v2.6.39-rc2

kthread: NUMA aware kthread_create_on_node()

2011-03-23T00:44:01+00:00

All kthreads being created from a single helper task, they all use memory
from a single node for their kernel stack and task struct.

This patch suite creates kthread_create_on_node(), adding a 'cpu' parameter
to parameters already used by kthread_create().

This parameter serves in allocating memory for the new kthread on its
memory node if possible.

Signed-off-by: Eric Dumazet 
Acked-by: David S. Miller 
Reviewed-by: Andi Kleen 
Acked-by: Rusty Russell 
Cc: Tejun Heo 
Cc: Tony Luck 
Cc: Fenghua Yu 
Cc: David Howells 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

sched: Constify function scope static struct sched_param usage

2011-01-07T14:55:45+00:00

Function-scope statics are discouraged because they are
easily overlooked and can cause subtle bugs/races due to
their global (non-SMP safe) nature.

Linus noticed that we did this for sched_param - at minimum
make the const.

Suggested-by: Linus Torvalds 
Signed-off-by: Peter Zijlstra 
LKML-Reference: Message-ID: 
Signed-off-by: Ingo Molnar

Merge commit 'v2.6.37' into sched/core

2011-01-05T13:14:46+00:00

Merge reason: Merge the final .37 tree.

Signed-off-by: Ingo Molnar

kthread_work: make lockdep happy

2010-12-22T09:27:53+00:00

spinlock in kthread_worker and wait_queue_head in kthread_work both
should be lockdep sensible, so change the interface to make it
suiltable for CONFIG_LOCKDEP.

tj: comment update

Reported-by: Nicolas 
Signed-off-by: Yong Zhang 
Signed-off-by: Andy Walls 
Tested-by: Andy Walls 
Cc: Tejun Heo 
Cc: Andrew Morton 
Signed-off-by: Tejun Heo

sched: Make sched_param argument static in sched_setscheduler() callers

2010-10-23T15:56:48+00:00

Andrew Morton pointed out almost all sched_setscheduler() callers are
using fixed parameters and can be converted to static.  It reduces runtime
memory use a little.

Signed-off-by: KOSAKI Motohiro 
Reported-by: Andrew Morton 
Acked-by: James Morris 
Cc: Ingo Molnar 
Cc: Steven Rostedt 
Signed-off-by: Andrew Morton 
Signed-off-by: Thomas Gleixner 
Signed-off-by: Ingo Molnar

kthread: implement kthread_data()

2010-06-29T08:07:09+00:00

Implement kthread_data() which takes @task pointing to a kthread and
returns @data specified when creating the kthread.  The caller is
responsible for ensuring the validity of @task when calling this
function.

Signed-off-by: Tejun Heo

kthread: implement kthread_worker

2010-06-29T08:07:09+00:00

Implement simple work processor for kthread.  This is to ease using
kthread.  Single thread workqueue used to be used for things like this
but workqueue won't guarantee fixed kthread association anymore to
enable worker sharing.

This can be used in cases where specific kthread association is
necessary, for example, when it should have RT priority or be assigned
to certain cgroup.

Signed-off-by: Tejun Heo 
Cc: Andrew Morton

cpuset: fix the problem that cpuset_mem_spread_node() returns an offline node

2010-03-24T23:31:21+00:00

cpuset_mem_spread_node() returns an offline node, and causes an oops.

This patch fixes it by initializing task->mems_allowed to
node_states[N_HIGH_MEMORY], and updating task->mems_allowed when doing
memory hotplug.

Signed-off-by: Miao Xie 
Acked-by: David Rientjes 
Reported-by: Nick Piggin 
Tested-by: Nick Piggin 
Cc: Paul Menage 
Cc: Li Zefan 
Cc: Ingo Molnar 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

kthread, sched: Remove reference to kthread_create_on_cpu

2010-02-09T10:47:39+00:00

kthread_create_on_cpu doesn't exist so update a comment in
kthread.c to reflect this.

Signed-off-by: Anton Blanchard 
Acked-by: Rusty Russell 
Cc: Peter Zijlstra 
LKML-Reference: <20100209040740.GB3702@kryten>
Signed-off-by: Ingo Molnar

sched: Move kthread_bind() back to kthread.c

2009-12-16T18:01:57+00:00

Since kthread_bind() lost its dependencies on sched.c, move it
back where it came from.

Signed-off-by: Peter Zijlstra 
Cc: Mike Galbraith 
LKML-Reference: <20091216170518.039524041@chello.nl>
Signed-off-by: Ingo Molnar