On Sun, 2007-08-26 at 01:09 -0700, Andrew Morton wrote:
> On Sun, 26 Aug 2007 10:47:24 +1000 Rusty Russell <[EMAIL PROTECTED]> wrote:
> > Userspace is not monolithic. If you refuse to take a CPU offline
> > because a task is affine, then any user can prevent a CPU from going
> > offline.
>
>
On Sun, 2007-08-26 at 01:09 -0700, Andrew Morton wrote:
On Sun, 26 Aug 2007 10:47:24 +1000 Rusty Russell [EMAIL PROTECTED] wrote:
Userspace is not monolithic. If you refuse to take a CPU offline
because a task is affine, then any user can prevent a CPU from going
offline.
That's a
On Sun, 26 Aug 2007 10:47:24 +1000 Rusty Russell <[EMAIL PROTECTED]> wrote:
> On Sun, 2007-08-26 at 05:46 +0530, Gautham R Shenoy wrote:
> > On Sat, Aug 25, 2007 at 01:47:40PM +0400, Oleg Nesterov wrote:
> > > Before this patch, process leaves its ->cpuset and migrates to some
> > > "random"
> >
On Sun, 26 Aug 2007 10:47:24 +1000 Rusty Russell [EMAIL PROTECTED] wrote:
On Sun, 2007-08-26 at 05:46 +0530, Gautham R Shenoy wrote:
On Sat, Aug 25, 2007 at 01:47:40PM +0400, Oleg Nesterov wrote:
Before this patch, process leaves its -cpuset and migrates to some
random
On Sun, 2007-08-26 at 05:46 +0530, Gautham R Shenoy wrote:
> On Sat, Aug 25, 2007 at 01:47:40PM +0400, Oleg Nesterov wrote:
> > Before this patch, process leaves its ->cpuset and migrates to some "random"
> > any_online_cpu(). With this patch it stays within ->cpuset and migrates to
> > CPU 3.
>
On Sat, Aug 25, 2007 at 01:47:40PM +0400, Oleg Nesterov wrote:
> On 08/24, Andrew Morton wrote:
> >
> > On Fri, 24 Aug 2007 17:18:06 -0500
> > Cliff Wickman <[EMAIL PROTECTED]> wrote:
> >
> > > When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
> > > that have been running on
On 08/24, Cliff Wickman wrote:
>
> @@ -5091,6 +5092,17 @@ restart:
> if (dest_cpu == NR_CPUS)
> dest_cpu = any_online_cpu(p->cpus_allowed);
>
> + /* try to stay on the same cpuset */
> + if (dest_cpu == NR_CPUS) {
> + /*
> + * The
On 08/24, Cliff Wickman wrote:
> --- linus.070821.orig/kernel/cpuset.c
> +++ linus.070821/kernel/cpuset.c
> @@ -2333,6 +2333,25 @@ cpumask_t cpuset_cpus_allowed(struct tas
> return mask;
> }
>
> +/**
> + * cpuset_cpus_allowed_lock - return cpus_allowed mask from a tasks cpuset.
> + *
On 08/24, Andrew Morton wrote:
>
> On Fri, 24 Aug 2007 17:18:06 -0500
> Cliff Wickman <[EMAIL PROTECTED]> wrote:
>
> > When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
> > that have been running on that cpu.
> >
> > Currently, such a task is migrated:
> > 1) to any cpu on
On 08/24, Andrew Morton wrote:
On Fri, 24 Aug 2007 17:18:06 -0500
Cliff Wickman [EMAIL PROTECTED] wrote:
When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
that have been running on that cpu.
Currently, such a task is migrated:
1) to any cpu on the same node as
On 08/24, Cliff Wickman wrote:
--- linus.070821.orig/kernel/cpuset.c
+++ linus.070821/kernel/cpuset.c
@@ -2333,6 +2333,25 @@ cpumask_t cpuset_cpus_allowed(struct tas
return mask;
}
+/**
+ * cpuset_cpus_allowed_lock - return cpus_allowed mask from a tasks cpuset.
+ * @tsk: pointer
On 08/24, Cliff Wickman wrote:
@@ -5091,6 +5092,17 @@ restart:
if (dest_cpu == NR_CPUS)
dest_cpu = any_online_cpu(p-cpus_allowed);
+ /* try to stay on the same cpuset */
+ if (dest_cpu == NR_CPUS) {
+ /*
+ * The
On Sat, Aug 25, 2007 at 01:47:40PM +0400, Oleg Nesterov wrote:
On 08/24, Andrew Morton wrote:
On Fri, 24 Aug 2007 17:18:06 -0500
Cliff Wickman [EMAIL PROTECTED] wrote:
When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
that have been running on that cpu.
On Sun, 2007-08-26 at 05:46 +0530, Gautham R Shenoy wrote:
On Sat, Aug 25, 2007 at 01:47:40PM +0400, Oleg Nesterov wrote:
Before this patch, process leaves its -cpuset and migrates to some random
any_online_cpu(). With this patch it stays within -cpuset and migrates to
CPU 3.
The
On Fri, 24 Aug 2007 17:18:06 -0500
Cliff Wickman <[EMAIL PROTECTED]> wrote:
> When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
> that have been running on that cpu.
>
> Currently, such a task is migrated:
> 1) to any cpu on the same node as the disabled cpu, which is both
When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
that have been running on that cpu.
Currently, such a task is migrated:
1) to any cpu on the same node as the disabled cpu, which is both online
and among that task's cpus_allowed
2) to any cpu which is both online and
When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
that have been running on that cpu.
Currently, such a task is migrated:
1) to any cpu on the same node as the disabled cpu, which is both online
and among that task's cpus_allowed
2) to any cpu which is both online and
On Fri, 24 Aug 2007 17:18:06 -0500
Cliff Wickman [EMAIL PROTECTED] wrote:
When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
that have been running on that cpu.
Currently, such a task is migrated:
1) to any cpu on the same node as the disabled cpu, which is both online
On Thu, 24 May 2007 09:56:01 +0200
Ingo Molnar <[EMAIL PROTECTED]> wrote:
>
> * Andrew Morton <[EMAIL PROTECTED]> wrote:
>
> > > When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
> > > that have been running on that cpu.
> >
> > So I still have these three patches in the
On Thu, 24 May 2007 09:56:01 +0200
Ingo Molnar [EMAIL PROTECTED] wrote:
* Andrew Morton [EMAIL PROTECTED] wrote:
When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
that have been running on that cpu.
So I still have these three patches in the pending queue but I
* Andrew Morton <[EMAIL PROTECTED]> wrote:
> > When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
> > that have been running on that cpu.
>
> So I still have these three patches in the pending queue but I was
> rather hoping that the scheduler, sched-domains and cpuset
* Andrew Morton [EMAIL PROTECTED] wrote:
When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
that have been running on that cpu.
So I still have these three patches in the pending queue but I was
rather hoping that the scheduler, sched-domains and cpuset people
could
On 05/23, Cliff Wickman wrote:
>
> On Thu, May 24, 2007 at 01:29:02AM +0400, Oleg Nesterov wrote:
> > Cliff Wickman wrote:
> > >
> > > - * NOTE: interrupts should be disabled by the caller
> > > + * NOTE: interrupts are not disabled by the caller
> > > */
> > > static void
On Thu, May 24, 2007 at 01:29:02AM +0400, Oleg Nesterov wrote:
> Cliff Wickman wrote:
> >
> > In order to do this, move_task_off_dead_cpu() must make a call to
> > cpuset_cpus_allowed(), which may block.
> >
> > move_task_off_dead_cpu() has been within a critical region when called
> > from
Cliff Wickman wrote:
>
> In order to do this, move_task_off_dead_cpu() must make a call to
> cpuset_cpus_allowed(), which may block.
>
> move_task_off_dead_cpu() has been within a critical region when called
> from migrate_live_tasks(). So this patch also changes migrate_live_tasks()
> to enable
On Mon, 21 May 2007 15:08:56 -0500 [EMAIL PROTECTED] (Cliff Wickman) wrote:
> (this is a third submission -- corrects a locking/blocking issue pointed
> out by Nathan Lynch)
>
> When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
> that have been running on that cpu.
So I
On Mon, 21 May 2007 15:08:56 -0500 [EMAIL PROTECTED] (Cliff Wickman) wrote:
(this is a third submission -- corrects a locking/blocking issue pointed
out by Nathan Lynch)
When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
that have been running on that cpu.
So I still
Cliff Wickman wrote:
In order to do this, move_task_off_dead_cpu() must make a call to
cpuset_cpus_allowed(), which may block.
move_task_off_dead_cpu() has been within a critical region when called
from migrate_live_tasks(). So this patch also changes migrate_live_tasks()
to enable
On Thu, May 24, 2007 at 01:29:02AM +0400, Oleg Nesterov wrote:
Cliff Wickman wrote:
In order to do this, move_task_off_dead_cpu() must make a call to
cpuset_cpus_allowed(), which may block.
move_task_off_dead_cpu() has been within a critical region when called
from
On 05/23, Cliff Wickman wrote:
On Thu, May 24, 2007 at 01:29:02AM +0400, Oleg Nesterov wrote:
Cliff Wickman wrote:
- * NOTE: interrupts should be disabled by the caller
+ * NOTE: interrupts are not disabled by the caller
*/
static void move_task_off_dead_cpu(int dead_cpu,
(this is a third submission -- corrects a locking/blocking issue pointed
out by Nathan Lynch)
When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
that have been running on that cpu.
Currently, such a task is migrated:
1) to any cpu on the same node as the disabled cpu, which
(this is a third submission -- corrects a locking/blocking issue pointed
out by Nathan Lynch)
When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
that have been running on that cpu.
Currently, such a task is migrated:
1) to any cpu on the same node as the disabled cpu, which
Robin Holt wrote:
> On Fri, Mar 09, 2007 at 05:58:59PM -0600, Nathan Lynch wrote:
> > Hello-
> >
> > Cliff Wickman wrote:
> > > This patch would insert a preference to migrate such a task to a cpu
> > > within
> > > its cpuset (and set its cpus_allowed to its cpuset).
> > >
> > > With this
Robin Holt wrote:
On Fri, Mar 09, 2007 at 05:58:59PM -0600, Nathan Lynch wrote:
Hello-
Cliff Wickman wrote:
This patch would insert a preference to migrate such a task to a cpu
within
its cpuset (and set its cpus_allowed to its cpuset).
With this patch, migrate the task
On Fri, Mar 09, 2007 at 05:58:59PM -0600, Nathan Lynch wrote:
> Hello-
>
> Cliff Wickman wrote:
> > This patch would insert a preference to migrate such a task to a cpu within
> > its cpuset (and set its cpus_allowed to its cpuset).
> >
> > With this patch, migrate the task to:
> > 1) to any
On Fri, Mar 09, 2007 at 05:58:59PM -0600, Nathan Lynch wrote:
Hello-
Cliff Wickman wrote:
This patch would insert a preference to migrate such a task to a cpu within
its cpuset (and set its cpus_allowed to its cpuset).
With this patch, migrate the task to:
1) to any cpu on the same
* Nathan Lynch <[EMAIL PROTECTED]> wrote:
> > > + /* try to stay on the same cpuset */
> > > + if (dest_cpu == NR_CPUS) {
> > > + p->cpus_allowed = cpuset_cpus_allowed(p);
> > > + dest_cpu = any_online_cpu(p->cpus_allowed);
> > > + }
> >
> > what's the practical effect of this -
Hi-
Ingo Molnar wrote:
>
> * Cliff Wickman <[EMAIL PROTECTED]> wrote:
>
> > With this patch, migrate the task to:
> > 1) to any cpu on the same node as the disabled cpu, which is both online
> > and among that task's cpus_allowed
> > 2) to any online cpu within the task's cpuset
> > 3)
* Cliff Wickman <[EMAIL PROTECTED]> wrote:
> With this patch, migrate the task to:
> 1) to any cpu on the same node as the disabled cpu, which is both online
> and among that task's cpus_allowed
> 2) to any online cpu within the task's cpuset
> 3) to any cpu which is both online and among
* Cliff Wickman [EMAIL PROTECTED] wrote:
With this patch, migrate the task to:
1) to any cpu on the same node as the disabled cpu, which is both online
and among that task's cpus_allowed
2) to any online cpu within the task's cpuset
3) to any cpu which is both online and among that
Hi-
Ingo Molnar wrote:
* Cliff Wickman [EMAIL PROTECTED] wrote:
With this patch, migrate the task to:
1) to any cpu on the same node as the disabled cpu, which is both online
and among that task's cpus_allowed
2) to any online cpu within the task's cpuset
3) to any cpu which
* Nathan Lynch [EMAIL PROTECTED] wrote:
+ /* try to stay on the same cpuset */
+ if (dest_cpu == NR_CPUS) {
+ p-cpus_allowed = cpuset_cpus_allowed(p);
+ dest_cpu = any_online_cpu(p-cpus_allowed);
+ }
what's the practical effect of this - when moving the last
Hello-
Cliff Wickman wrote:
> This patch would insert a preference to migrate such a task to a cpu within
> its cpuset (and set its cpus_allowed to its cpuset).
>
> With this patch, migrate the task to:
> 1) to any cpu on the same node as the disabled cpu, which is both online
> and among
From: Cliff Wickman <[EMAIL PROTECTED]>
(this is a second submission -- the first was from a work area back
porting to an older release)
When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
that have been running on that cpu.
Currently, such a task is migrated:
1) to any cpu
From: Cliff Wickman [EMAIL PROTECTED]
(this is a second submission -- the first was from a work area back
porting to an older release)
When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
that have been running on that cpu.
Currently, such a task is migrated:
1) to any cpu on
Hello-
Cliff Wickman wrote:
This patch would insert a preference to migrate such a task to a cpu within
its cpuset (and set its cpus_allowed to its cpuset).
With this patch, migrate the task to:
1) to any cpu on the same node as the disabled cpu, which is both online
and among that
On Wed, 07 Mar 2007 08:24:44 -0600 Cliff Wickman wrote:
>
> From: Cliff Wickman <[EMAIL PROTECTED]>
>
> When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
> that have been running on that cpu.
>
> Currently, such a task is migrated:
> 1) to any cpu on the same node as the
From: Cliff Wickman <[EMAIL PROTECTED]>
When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
that have been running on that cpu.
Currently, such a task is migrated:
1) to any cpu on the same node as the disabled cpu, which is both online
and among that task's cpus_allowed
From: Cliff Wickman [EMAIL PROTECTED]
When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
that have been running on that cpu.
Currently, such a task is migrated:
1) to any cpu on the same node as the disabled cpu, which is both online
and among that task's cpus_allowed
2)
On Wed, 07 Mar 2007 08:24:44 -0600 Cliff Wickman wrote:
From: Cliff Wickman [EMAIL PROTECTED]
When a cpu is disabled, move_task_off_dead_cpu() is called for tasks
that have been running on that cpu.
Currently, such a task is migrated:
1) to any cpu on the same node as the disabled
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