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* Re: [PATCH 2/6] Container Freezer: Make refrigerator always available
       [not found] ` <20080801050700.528446138@us.ibm.com>
@ 2008-08-01 14:27   ` Thomas Petazzoni
  2008-08-01 19:08     ` Matt Helsley
  0 siblings, 1 reply; 7+ messages in thread
From: Thomas Petazzoni @ 2008-08-01 14:27 UTC (permalink / raw)
  To: Matt Helsley
  Cc: Andrew Morton, Rafael J. Wysocki, Paul Menage, Li Zefan,
	Linux-Kernel, Linux Containers, linux-pm, Cedric Le Goater,
	Serge E. Hallyn, Michael Opdenacker, linux-embedded

Hi,

Le Thu, 31 Jul 2008 22:07:01 -0700,
Matt Helsley <matthltc@us.ibm.com> a écrit :

> --- a/kernel/Makefile
> +++ b/kernel/Makefile
> @@ -5,7 +5,7 @@
>  obj-y     = sched.o fork.o exec_domain.o panic.o printk.o \
>  	    cpu.o exit.o itimer.o time.o softirq.o resource.o \
>  	    sysctl.o capability.o ptrace.o timer.o user.o \
> -	    signal.o sys.o kmod.o workqueue.o pid.o \
> +	    signal.o sys.o kmod.o workqueue.o pid.o freezer.o \

I have the impression that the code in kernel/power/process.c was
compiled only if CONFIG_PM_SLEEP was set. Now that the code has been
moved to kernel/freezer.c, it is unconditionnaly compiled in every
kernel. Is that correct ?

If so, is it possible to put this new feature under some
CONFIG_SOMETHING option, for people who care about the kernel size ?

Thanks,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers and embedded Linux development,
consulting, training and support.
http://free-electrons.com

^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: [PATCH 2/6] Container Freezer: Make refrigerator always available
  2008-08-01 14:27   ` [PATCH 2/6] Container Freezer: Make refrigerator always available Thomas Petazzoni
@ 2008-08-01 19:08     ` Matt Helsley
  2008-08-01 22:53       ` Rafael J. Wysocki
  2008-08-02 10:39       ` Thomas Petazzoni
  0 siblings, 2 replies; 7+ messages in thread
From: Matt Helsley @ 2008-08-01 19:08 UTC (permalink / raw)
  To: Thomas Petazzoni
  Cc: Andrew Morton, Rafael J. Wysocki, Paul Menage, Li Zefan,
	Linux-Kernel, Linux Containers, linux-pm, Cedric Le Goater,
	Serge E. Hallyn, Michael Opdenacker, linux-embedded


On Fri, 2008-08-01 at 16:27 +-0200, Thomas Petazzoni wrote:
+AD4 Hi,
+AD4 
+AD4 Le Thu, 31 Jul 2008 22:07:01 -0700,
+AD4 Matt Helsley +ADw-matthltc+AEA-us.ibm.com+AD4 a +AOk-crit :
+AD4 
+AD4 +AD4 --- a/kernel/Makefile
+AD4 +AD4 +-+-+- b/kernel/Makefile
+AD4 +AD4 +AEAAQA -5,7 +-5,7 +AEAAQA
+AD4 +AD4  obj-y     +AD0 sched.o fork.o exec+AF8-domain.o panic.o printk.o +AFw
+AD4 +AD4  	    cpu.o exit.o itimer.o time.o softirq.o resource.o +AFw
+AD4 +AD4  	    sysctl.o capability.o ptrace.o timer.o user.o +AFw
+AD4 +AD4 -	    signal.o sys.o kmod.o workqueue.o pid.o +AFw
+AD4 +AD4 +-	    signal.o sys.o kmod.o workqueue.o pid.o freezer.o +AFw
+AD4 
+AD4 I have the impression that the code in kernel/power/process.c was
+AD4 compiled only if CONFIG+AF8-PM+AF8-SLEEP was set. Now that the code has been
+AD4 moved to kernel/freezer.c, it is unconditionnaly compiled in every
+AD4 kernel. Is that correct ?
+AD4
+AD4 If so, is it possible to put this new feature under some
+AD4 CONFIG+AF8-SOMETHING option, for people who care about the kernel size ?

	How about making it depend on a combination of CONFIG variables?
Here's an RFC PATCH. Completely untested.

Signed-off-by: Matt Helsley +ADw-matthltc+AEA-us.ibm.com+AD4
---
 kernel/Makefile      +AHw    3 +-+--
 kernel/power/Kconfig +AHw    3 +-+-+-
 2 files changed, 5 insertions(+-), 1 deletion(-)

Index: linux-2.6.27-rc1-mm1/kernel/Makefile
+AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0
--- linux-2.6.27-rc1-mm1.orig/kernel/Makefile
+-+-+- linux-2.6.27-rc1-mm1/kernel/Makefile
+AEAAQA -5,7 +-5,7 +AEAAQA
 obj-y     +AD0 sched.o fork.o exec+AF8-domain.o panic.o printk.o +AFw
 	    cpu.o exit.o itimer.o time.o softirq.o resource.o +AFw
 	    sysctl.o capability.o ptrace.o timer.o user.o +AFw
-	    signal.o sys.o kmod.o workqueue.o pid.o freezer.o +AFw
+-	    signal.o sys.o kmod.o workqueue.o pid.o +AFw
 	    rcupdate.o extable.o params.o posix-timers.o +AFw
 	    kthread.o wait.o kfifo.o sys+AF8-ni.o posix-cpu-timers.o mutex.o +AFw
 	    hrtimer.o rwsem.o nsproxy.o srcu.o semaphore.o +AFw
+AEAAQA -24,6 +-24,7 +AEAAQA CFLAGS+AF8-REMOVE+AF8-sched+AF8-clock.o +AD0 -pg
 CFLAGS+AF8-REMOVE+AF8-sched.o +AD0 -mno-spe -pg
 endif
 
+-obj-+ACQ(CONFIG+AF8-FREEZER) +-+AD0 freezer.o
 obj-+ACQ(CONFIG+AF8-PROFILING) +-+AD0 profile.o
 obj-+ACQ(CONFIG+AF8-SYSCTL+AF8-SYSCALL+AF8-CHECK) +-+AD0 sysctl+AF8-check.o
 obj-+ACQ(CONFIG+AF8-STACKTRACE) +-+AD0 stacktrace.o
Index: linux-2.6.27-rc1-mm1/kernel/power/Kconfig
+AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0
--- linux-2.6.27-rc1-mm1.orig/kernel/power/Kconfig
+-+-+- linux-2.6.27-rc1-mm1/kernel/power/Kconfig
+AEAAQA -85,6 +-85,9 +AEAAQA config PM+AF8-SLEEP
 	depends on SUSPEND +AHwAfA HIBERNATION +AHwAfA XEN+AF8-SAVE+AF8-RESTORE
 	default y
 
+-config FREEZER
+-	def+AF8-bool PM+AF8-SLEEP +AHwAfA CGROUP+AF8-FREEZER
+-
 config SUSPEND
 	bool +ACI-Suspend to RAM and standby+ACI
 	depends on PM +ACYAJg ARCH+AF8-SUSPEND+AF8-POSSIBLE



^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: [PATCH 2/6] Container Freezer: Make refrigerator always available
  2008-08-01 19:08     ` Matt Helsley
@ 2008-08-01 22:53       ` Rafael J. Wysocki
  2008-08-01 23:24         ` Matt Helsley
  2008-08-02  2:30         ` Matt Helsley
  2008-08-02 10:39       ` Thomas Petazzoni
  1 sibling, 2 replies; 7+ messages in thread
From: Rafael J. Wysocki @ 2008-08-01 22:53 UTC (permalink / raw)
  To: Matt Helsley, Andrew Morton
  Cc: Thomas Petazzoni, Paul Menage, Li Zefan, Linux-Kernel,
	Linux Containers, linux-pm, Cedric Le Goater, Serge E. Hallyn,
	Michael Opdenacker, linux-embedded

On Friday, 1 of August 2008, Matt Helsley wrote:
> 
> On Fri, 2008-08-01 at 16:27 +-0200, Thomas Petazzoni wrote:
> > Hi,
> > 
> > Le Thu, 31 Jul 2008 22:07:01 -0700,
> > Matt Helsley <matthltc@us.ibm.com> a +AOk-crit :
> > 
> > > --- a/kernel/Makefile
> > > +-+-+- b/kernel/Makefile
> > > @@ -5,7 +-5,7 @@
> > >  obj-y     = sched.o fork.o exec_domain.o panic.o printk.o +AFw
> > >  	    cpu.o exit.o itimer.o time.o softirq.o resource.o +AFw
> > >  	    sysctl.o capability.o ptrace.o timer.o user.o +AFw
> > > -	    signal.o sys.o kmod.o workqueue.o pid.o +AFw
> > > +-	    signal.o sys.o kmod.o workqueue.o pid.o freezer.o +AFw
> > 
> > I have the impression that the code in kernel/power/process.c was
> > compiled only if CONFIG_PM_SLEEP was set. Now that the code has been
> > moved to kernel/freezer.c, it is unconditionnaly compiled in every
> > kernel. Is that correct ?
> >
> > If so, is it possible to put this new feature under some
> > CONFIG_SOMETHING option, for people who care about the kernel size ?
> 
> 	How about making it depend on a combination of CONFIG variables?
> Here's an RFC PATCH. Completely untested.
> 
> Signed-off-by: Matt Helsley <matthltc@us.ibm.com>

Can you please also make the contents of include/linux/freezer.h depend on
CONFIG_FREEZER instead of CONFIG_PM_SLEEP?

Also, I'm not really sure if kernel/power/Kconfig is the right place to define
CONFIG_FREEZER.

Perhaps we should even move freezer.c from kernel/power to kernel
and define CONFIG_FREEZER in Kconfig in there.  Andrew, what do you think?

> ---
>  kernel/Makefile      |    3 +-+--
>  kernel/power/Kconfig |    3 +-+-+-
>  2 files changed, 5 insertions(+-), 1 deletion(-)
> 
> Index: linux-2.6.27-rc1-mm1/kernel/Makefile
> ===================================================================
> --- linux-2.6.27-rc1-mm1.orig/kernel/Makefile
> +-+-+- linux-2.6.27-rc1-mm1/kernel/Makefile
> @@ -5,7 +-5,7 @@
>  obj-y     = sched.o fork.o exec_domain.o panic.o printk.o +AFw
>  	    cpu.o exit.o itimer.o time.o softirq.o resource.o +AFw
>  	    sysctl.o capability.o ptrace.o timer.o user.o +AFw
> -	    signal.o sys.o kmod.o workqueue.o pid.o freezer.o +AFw
> +-	    signal.o sys.o kmod.o workqueue.o pid.o +AFw
>  	    rcupdate.o extable.o params.o posix-timers.o +AFw
>  	    kthread.o wait.o kfifo.o sys_ni.o posix-cpu-timers.o mutex.o +AFw
>  	    hrtimer.o rwsem.o nsproxy.o srcu.o semaphore.o +AFw
> @@ -24,6 +-24,7 @@ CFLAGS_REMOVE_sched_clock.o = -pg
>  CFLAGS_REMOVE_sched.o = -mno-spe -pg
>  endif
>  
> +-obj-$(CONFIG_FREEZER) +-= freezer.o
>  obj-$(CONFIG_PROFILING) +-= profile.o
>  obj-$(CONFIG_SYSCTL_SYSCALL_CHECK) +-= sysctl_check.o
>  obj-$(CONFIG_STACKTRACE) +-= stacktrace.o
> Index: linux-2.6.27-rc1-mm1/kernel/power/Kconfig
> ===================================================================
> --- linux-2.6.27-rc1-mm1.orig/kernel/power/Kconfig
> +-+-+- linux-2.6.27-rc1-mm1/kernel/power/Kconfig
> @@ -85,6 +-85,9 @@ config PM_SLEEP
>  	depends on SUSPEND || HIBERNATION || XEN_SAVE_RESTORE
>  	default y
>  
> +-config FREEZER
> +-	def_bool PM_SLEEP || CGROUP_FREEZER
> +-
>  config SUSPEND
>  	bool "Suspend to RAM and standby"
>  	depends on PM && ARCH_SUSPEND_POSSIBLE
> 
> 
> 
> 
> 


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^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: [PATCH 2/6] Container Freezer: Make refrigerator always available
  2008-08-01 22:53       ` Rafael J. Wysocki
@ 2008-08-01 23:24         ` Matt Helsley
  2008-08-02 14:34           ` Rafael J. Wysocki
  2008-08-02  2:30         ` Matt Helsley
  1 sibling, 1 reply; 7+ messages in thread
From: Matt Helsley @ 2008-08-01 23:24 UTC (permalink / raw)
  To: Rafael J. Wysocki
  Cc: Andrew Morton, Thomas Petazzoni, Paul Menage, Li Zefan,
	Linux-Kernel, Linux Containers, linux-pm, Cedric Le Goater,
	Serge E. Hallyn, Michael Opdenacker, linux-embedded


On Sat, 2008-08-02 at 00:53 +-0200, Rafael J. Wysocki wrote:
+AD4 On Friday, 1 of August 2008, Matt Helsley wrote:
+AD4 +AD4 
+AD4 +AD4 On Fri, 2008-08-01 at 16:27 +-0200, Thomas Petazzoni wrote:
+AD4 +AD4 +AD4 Hi,
+AD4 +AD4 +AD4 
+AD4 +AD4 +AD4 Le Thu, 31 Jul 2008 22:07:01 -0700,
+AD4 +AD4 +AD4 Matt Helsley +ADw-matthltc+AEA-us.ibm.com+AD4 a +AOk-crit :
+AD4 +AD4 +AD4 
+AD4 +AD4 +AD4 +AD4 --- a/kernel/Makefile
+AD4 +AD4 +AD4 +AD4 +-+-+- b/kernel/Makefile
+AD4 +AD4 +AD4 +AD4 +AEAAQA -5,7 +-5,7 +AEAAQA
+AD4 +AD4 +AD4 +AD4  obj-y     +AD0 sched.o fork.o exec+AF8-domain.o panic.o printk.o +AFw
+AD4 +AD4 +AD4 +AD4  	    cpu.o exit.o itimer.o time.o softirq.o resource.o +AFw
+AD4 +AD4 +AD4 +AD4  	    sysctl.o capability.o ptrace.o timer.o user.o +AFw
+AD4 +AD4 +AD4 +AD4 -	    signal.o sys.o kmod.o workqueue.o pid.o +AFw
+AD4 +AD4 +AD4 +AD4 +-	    signal.o sys.o kmod.o workqueue.o pid.o freezer.o +AFw
+AD4 +AD4 +AD4 
+AD4 +AD4 +AD4 I have the impression that the code in kernel/power/process.c was
+AD4 +AD4 +AD4 compiled only if CONFIG+AF8-PM+AF8-SLEEP was set. Now that the code has been
+AD4 +AD4 +AD4 moved to kernel/freezer.c, it is unconditionnaly compiled in every
+AD4 +AD4 +AD4 kernel. Is that correct ?
+AD4 +AD4 +AD4
+AD4 +AD4 +AD4 If so, is it possible to put this new feature under some
+AD4 +AD4 +AD4 CONFIG+AF8-SOMETHING option, for people who care about the kernel size ?
+AD4 +AD4 
+AD4 +AD4 	How about making it depend on a combination of CONFIG variables?
+AD4 +AD4 Here's an RFC PATCH. Completely untested.
+AD4 +AD4 
+AD4 +AD4 Signed-off-by: Matt Helsley +ADw-matthltc+AEA-us.ibm.com+AD4
+AD4 
+AD4 Can you please also make the contents of include/linux/freezer.h depend on
+AD4 CONFIG+AF8-FREEZER instead of CONFIG+AF8-PM+AF8-SLEEP?

Good point -- I'll add that to this patch and repost.

+AD4 Also, I'm not really sure if kernel/power/Kconfig is the right place to define
+AD4 CONFIG+AF8-FREEZER.

	There's no nice place to put it since we're dealing with CONFIG+AF8
variables in two different Kconfig files. I put it in
kernel/power/Kconfig because I wasn't certain Kbuild would do the right
thing if I referenced PM+AF8-SLEEP from init/Kconfig.

+AD4 Perhaps we should even move freezer.c from kernel/power to kernel

It's already there. Perhaps you meant something else
(kernel/power/process.c?)?

+AD4 and define CONFIG+AF8-FREEZER in Kconfig in there.  Andrew, what do you think?

The Kconfig files in kernel/ are Kconfig.hz and Kconfig.preemt which
don't seem appropriate. I suppose we could add another (perhaps
Kconfig.cgroup).

Thanks for the review+ACE

Cheers,
	-Matt

^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: [PATCH 2/6] Container Freezer: Make refrigerator always available
  2008-08-01 22:53       ` Rafael J. Wysocki
  2008-08-01 23:24         ` Matt Helsley
@ 2008-08-02  2:30         ` Matt Helsley
  1 sibling, 0 replies; 7+ messages in thread
From: Matt Helsley @ 2008-08-02  2:30 UTC (permalink / raw)
  To: Rafael J. Wysocki
  Cc: Andrew Morton, Thomas Petazzoni, Paul Menage, Li Zefan,
	Linux-Kernel, Linux Containers, linux-pm, Cedric Le Goater,
	Serge E. Hallyn, Michael Opdenacker, linux-embedded


On Sat, 2008-08-02 at 00:53 +-0200, Rafael J. Wysocki wrote:
+AD4 On Friday, 1 of August 2008, Matt Helsley wrote:
+AD4 +AD4 
+AD4 +AD4 On Fri, 2008-08-01 at 16:27 +-0200, Thomas Petazzoni wrote:
+AD4 +AD4 +AD4 Hi,
+AD4 +AD4 +AD4 
+AD4 +AD4 +AD4 Le Thu, 31 Jul 2008 22:07:01 -0700,
+AD4 +AD4 +AD4 Matt Helsley +ADw-matthltc+AEA-us.ibm.com+AD4 a +AOk-crit :
+AD4 +AD4 +AD4 
+AD4 +AD4 +AD4 +AD4 --- a/kernel/Makefile
+AD4 +AD4 +AD4 +AD4 +-+-+- b/kernel/Makefile
+AD4 +AD4 +AD4 +AD4 +AEAAQA -5,7 +-5,7 +AEAAQA
+AD4 +AD4 +AD4 +AD4  obj-y     +AD0 sched.o fork.o exec+AF8-domain.o panic.o printk.o +AFw
+AD4 +AD4 +AD4 +AD4  	    cpu.o exit.o itimer.o time.o softirq.o resource.o +AFw
+AD4 +AD4 +AD4 +AD4  	    sysctl.o capability.o ptrace.o timer.o user.o +AFw
+AD4 +AD4 +AD4 +AD4 -	    signal.o sys.o kmod.o workqueue.o pid.o +AFw
+AD4 +AD4 +AD4 +AD4 +-	    signal.o sys.o kmod.o workqueue.o pid.o freezer.o +AFw
+AD4 +AD4 +AD4 
+AD4 +AD4 +AD4 I have the impression that the code in kernel/power/process.c was
+AD4 +AD4 +AD4 compiled only if CONFIG+AF8-PM+AF8-SLEEP was set. Now that the code has been
+AD4 +AD4 +AD4 moved to kernel/freezer.c, it is unconditionnaly compiled in every
+AD4 +AD4 +AD4 kernel. Is that correct ?
+AD4 +AD4 +AD4
+AD4 +AD4 +AD4 If so, is it possible to put this new feature under some
+AD4 +AD4 +AD4 CONFIG+AF8-SOMETHING option, for people who care about the kernel size ?
+AD4 +AD4 
+AD4 +AD4 	How about making it depend on a combination of CONFIG variables?
+AD4 +AD4 Here's an RFC PATCH. Completely untested.
+AD4 +AD4 
+AD4 +AD4 Signed-off-by: Matt Helsley +ADw-matthltc+AEA-us.ibm.com+AD4
+AD4 
+AD4 Can you please also make the contents of include/linux/freezer.h depend on
+AD4 CONFIG+AF8-FREEZER instead of CONFIG+AF8-PM+AF8-SLEEP?

Done.

+AD4 Also, I'm not really sure if kernel/power/Kconfig is the right place to define
+AD4 CONFIG+AF8-FREEZER.
+AD4 
+AD4 Perhaps we should even move freezer.c from kernel/power to kernel
+AD4 and define CONFIG+AF8-FREEZER in Kconfig in there.  Andrew, what do you think?

	I'll check this weekend for replies and repost the RFC PATCH on Monday
if I don't hear anything. In the meantime I'll be doing some config
build testing with the above changes to make sure it's correct.

Cheers,
	-Matt

^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: [PATCH 2/6] Container Freezer: Make refrigerator always available
  2008-08-01 19:08     ` Matt Helsley
  2008-08-01 22:53       ` Rafael J. Wysocki
@ 2008-08-02 10:39       ` Thomas Petazzoni
  1 sibling, 0 replies; 7+ messages in thread
From: Thomas Petazzoni @ 2008-08-02 10:39 UTC (permalink / raw)
  To: Matt Helsley
  Cc: Andrew Morton, Rafael J. Wysocki, Paul Menage, Li Zefan,
	Linux-Kernel, Linux Containers, linux-pm, Cedric Le Goater,
	Serge E. Hallyn, Michael Opdenacker, linux-embedded

Le Fri, 01 Aug 2008 12:08:09 -0700,
Matt Helsley <matthltc@us.ibm.com> a écrit :

> 	How about making it depend on a combination of CONFIG
> variables? Here's an RFC PATCH. Completely untested.

It solves my kernel size increase problem, so it's perfectly fine for
me.

Thanks!

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers and embedded Linux development,
consulting, training and support.
http://free-electrons.com

^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: [PATCH 2/6] Container Freezer: Make refrigerator always available
  2008-08-01 23:24         ` Matt Helsley
@ 2008-08-02 14:34           ` Rafael J. Wysocki
  0 siblings, 0 replies; 7+ messages in thread
From: Rafael J. Wysocki @ 2008-08-02 14:34 UTC (permalink / raw)
  To: Matt Helsley
  Cc: Andrew Morton, Thomas Petazzoni, Paul Menage, Li Zefan,
	Linux-Kernel, Linux Containers, linux-pm, Cedric Le Goater,
	Serge E. Hallyn, Michael Opdenacker, linux-embedded

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset="macroman", Size: 7822 bytes --]

On Saturday, 2 of August 2008, Matt Helsley wrote:
> 
> On Sat, 2008-08-02 at 00:53 +-0200, Rafael J. Wysocki wrote:
> > On Friday, 1 of August 2008, Matt Helsley wrote:
> > > 
> > > On Fri, 2008-08-01 at 16:27 +-0200, Thomas Petazzoni wrote:
> > > > Hi,
> > > > 
> > > > Le Thu, 31 Jul 2008 22:07:01 -0700,
> > > > Matt Helsley <matthltc@us.ibm.com> a +AOk-crit :
> > > > 
> > > > > --- a/kernel/Makefile
> > > > > +-+-+- b/kernel/Makefile
> > > > > @@ -5,7 +-5,7 @@
> > > > >  obj-y     = sched.o fork.o exec_domain.o panic.o printk.o +AFw
> > > > >  	    cpu.o exit.o itimer.o time.o softirq.o resource.o +AFw
> > > > >  	    sysctl.o capability.o ptrace.o timer.o user.o +AFw
> > > > > -	    signal.o sys.o kmod.o workqueue.o pid.o +AFw
> > > > > +-	    signal.o sys.o kmod.o workqueue.o pid.o freezer.o +AFw
> > > > 
> > > > I have the impression that the code in kernel/power/process.c was
> > > > compiled only if CONFIG_PM_SLEEP was set. Now that the code has been
> > > > moved to kernel/freezer.c, it is unconditionnaly compiled in every
> > > > kernel. Is that correct ?
> > > >
> > > > If so, is it possible to put this new feature under some
> > > > CONFIG_SOMETHING option, for people who care about the kernel size ?
> > > 
> > > 	How about making it depend on a combination of CONFIG variables?
> > > Here's an RFC PATCH. Completely untested.
> > > 
> > > Signed-off-by: Matt Helsley <matthltc@us.ibm.com>
> > 
> > Can you please also make the contents of include/linux/freezer.h depend on
> > CONFIG_FREEZER instead of CONFIG_PM_SLEEP?
> 
> Good point -- I'll add that to this patch and repost.
> 
> > Also, I'm not really sure if kernel/power/Kconfig is the right place to define
> > CONFIG_FREEZER.
> 
> 	There's no nice place to put it since we're dealing with CONFIG_
> variables in two different Kconfig files. I put it in
> kernel/power/Kconfig because I wasn't certain Kbuild would do the right
> thing if I referenced PM_SLEEP from init/Kconfig.
> 
> > Perhaps we should even move freezer.c from kernel/power to kernel
> 
> It's already there.

Yes, sorry.

> Perhaps you meant something else (kernel/power/process.c?)?

Well, I'll have to actually apply the patches and look at the modified code.

> > and define CONFIG_FREEZER in Kconfig in there.  Andrew, what do you think?
> 
> The Kconfig files in kernel/ are Kconfig.hz and Kconfig.preemt which
> don't seem appropriate. I suppose we could add another (perhaps
> Kconfig.cgroup).

Either that, or Kconfig.freezer maybe?  After all, it will also be used for
PM_SLEEP, at least for some time.

> Thanks for the review!

You're welcome.

Thanks,
Rafael
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^ permalink raw reply	[flat|nested] 7+ messages in thread
end of thread, other threads:[~2008-08-02 14:34 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
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     [not found] <20080801050659.924495279@us.ibm.com>
     [not found] ` <20080801050700.528446138@us.ibm.com>
2008-08-01 14:27   ` [PATCH 2/6] Container Freezer: Make refrigerator always available Thomas Petazzoni
2008-08-01 19:08     ` Matt Helsley
2008-08-01 22:53       ` Rafael J. Wysocki
2008-08-01 23:24         ` Matt Helsley
2008-08-02 14:34           ` Rafael J. Wysocki
2008-08-02  2:30         ` Matt Helsley
2008-08-02 10:39       ` Thomas Petazzoni

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