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[Xen-devel] Re: [linux-pm] [PATCH v3 4/5] PM: Add visible HIBERNATION_INTERFACE and hide HIBERNATION
On Sat, Mar 19, 2011 at 6:25 PM, Shriram Rajagopalan <rshriram@xxxxxxxxx> wrote:
On Fri, Mar 18, 2011 at 2:36 PM, Rafael J. Wysocki <rjw@xxxxxxx> wrote:
On Wednesday, March 16, 2011, Rafael J. Wysocki wrote:
> On Tuesday, March 15, 2011, Shriram Rajagopalan wrote:
> > 2011/3/15 Rafael J. Wysocki < rjw@xxxxxxx>:
>
> Basically, I can do the patch for you, but that'll take some time.
> Stay tuned. :-)
The patch below appears to work for me, please check if it works
for you when you put the Xen patch selecting HIBERNATION on top
of it.
Thanks,
Rafael
---
arch/x86/power/Makefile | 3 ++-
include/linux/suspend.h | 15 +++++----------
kernel/power/Kconfig | 4 ++++
kernel/power/Makefile | 4 ++--
kernel/power/main.c | 2 +-
kernel/power/power.h | 6 +++---
6 files changed, 17 insertions(+), 17 deletions(-)
Index: linux-2.6/kernel/power/Kconfig
===================================================================
--- linux-2.6.orig/kernel/power/Kconfig
+++ linux-2.6/kernel/power/Kconfig
@@ -19,8 +19,12 @@ config SUSPEND_FREEZER
Turning OFF this setting is NOT recommended! If in doubt, say Y.
config HIBERNATION
+ bool
+
+config HIBERNATE_INTERFACE
bool "Hibernation (aka 'suspend to disk')"
depends on SWAP && ARCH_HIBERNATION_POSSIBLE
+ select HIBERNATION
select LZO_COMPRESS
select LZO_DECOMPRESS
---help---
Index: linux-2.6/kernel/power/Makefile
===================================================================
--- linux-2.6.orig/kernel/power/Makefile
+++ linux-2.6/kernel/power/Makefile
@@ -5,7 +5,7 @@ obj-$(CONFIG_PM_SLEEP) += console.o
obj-$(CONFIG_FREEZER) += process.o
obj-$(CONFIG_SUSPEND) += suspend.o
obj-$(CONFIG_PM_TEST_SUSPEND) += suspend_test.o
-obj-$(CONFIG_HIBERNATION) += hibernate.o snapshot.o swap.o user.o \
- block_io.o
+obj-$(CONFIG_HIBERNATE_INTERFACE) += hibernate.o snapshot.o swap.o \
+ user.o block_io.o
obj-$(CONFIG_MAGIC_SYSRQ) += poweroff.o
Index: linux-2.6/include/linux/suspend.h
===================================================================
--- linux-2.6.orig/include/linux/suspend.h
+++ linux-2.6/include/linux/suspend.h
@@ -229,7 +229,7 @@ struct platform_hibernation_ops {
void (*recover)(void);
};
-#ifdef CONFIG_HIBERNATION
+#ifdef CONFIG_HIBERNATE_INTERFACE
/* kernel/power/snapshot.c */
extern void __register_nosave_region(unsigned long b, unsigned long e, int km);
static inline void __init register_nosave_region(unsigned long b, unsigned long e)
@@ -248,7 +248,9 @@ extern unsigned long get_safe_page(gfp_t
extern void hibernation_set_ops(const struct platform_hibernation_ops *ops);
extern int hibernate(void);
extern bool system_entering_hibernation(void);
-#else /* CONFIG_HIBERNATION */
+#else /* !CONFIG_HIBERNATE_INTERFACE */
+static inline void register_nosave_region(unsigned long b, unsigned long e) {}
+static inline void register_nosave_region_late(unsigned long b, unsigned long e) {}
static inline int swsusp_page_is_forbidden(struct page *p) { return 0; }
static inline void swsusp_set_page_free(struct page *p) {}
static inline void swsusp_unset_page_free(struct page *p) {}
@@ -256,7 +258,7 @@ static inline void swsusp_unset_page_fre
static inline void hibernation_set_ops(const struct platform_hibernation_ops *ops) {}
static inline int hibernate(void) { return -ENOSYS; }
static inline bool system_entering_hibernation(void) { return false; }
-#endif /* CONFIG_HIBERNATION */
+#endif /* !CONFIG_HIBERNATE_INTERFACE */
#ifdef CONFIG_PM_SLEEP
void save_processor_state(void);
@@ -298,13 +300,6 @@ static inline bool pm_wakeup_pending(voi
extern struct mutex pm_mutex;
#ifndef CONFIG_HIBERNATION
-static inline void register_nosave_region(unsigned long b, unsigned long e)
-{
-}
-static inline void register_nosave_region_late(unsigned long b, unsigned long e)
-{
-}
-
static inline void lock_system_sleep(void) {}
static inline void unlock_system_sleep(void) {}
Index: linux-2.6/arch/x86/power/Makefile
===================================================================
--- linux-2.6.orig/arch/x86/power/Makefile
+++ linux-2.6/arch/x86/power/Makefile
@@ -4,4 +4,5 @@ nostackp := $(call cc-option, -fno-stack
CFLAGS_cpu.o := $(nostackp)
obj-$(CONFIG_PM_SLEEP) += cpu.o
-obj-$(CONFIG_HIBERNATION) += hibernate_$(BITS).o hibernate_asm_$(BITS).o
+obj-$(CONFIG_HIBERNATE_INTERFACE) += hibernate_$(BITS).o \
+ hibernate_asm_$(BITS).o
Index: linux-2.6/kernel/power/main.c
===================================================================
--- linux-2.6.orig/kernel/power/main.c
+++ linux-2.6/kernel/power/main.c
@@ -156,7 +156,7 @@ static ssize_t state_show(struct kobject
s += sprintf(s,"%s ", pm_states[i]);
}
#endif
-#ifdef CONFIG_HIBERNATION
+#ifdef CONFIG_HIBERNATE_INTERFACE
s += sprintf(s, "%s\n", "disk");
#else
if (s != buf)
Index: linux-2.6/kernel/power/power.h
===================================================================
--- linux-2.6.orig/kernel/power/power.h
+++ linux-2.6/kernel/power/power.h
@@ -13,7 +13,7 @@ struct swsusp_info {
unsigned long size;
} __attribute__((aligned(PAGE_SIZE)));
-#ifdef CONFIG_HIBERNATION
+#ifdef CONFIG_HIBERNATE_INTERFACE
/* kernel/power/snapshot.c */
extern void __init hibernate_image_size_init(void);
@@ -53,10 +53,10 @@ extern int hibernation_snapshot(int plat
extern int hibernation_restore(int platform_mode);
extern int hibernation_platform_enter(void);
-#else /* !CONFIG_HIBERNATION */
+#else /* !CONFIG_HIBERNATE_INTERFACE */
static inline void hibernate_image_size_init(void) {}
-#endif /* !CONFIG_HIBERNATION */
+#endif /* !CONFIG_HIBERNATE_INTERFACE */
extern int pfn_is_nosave(unsigned long);
in my installation (cant seem to boot a PV kernel - nothing to do
with your patch).
Will respond once I get the boot issue sorted.
shriram
sorry for the delay. I finally managed to get my system back in
one piece.
So the patch you sent works perfectly. I tested xen save/restore with
both HIBERNATE_INTERFACE enabled and disabled. When disabled,
I dont see sys/power/disk.. (as expected).
so how do you want to go about these two patches? I am ok with you
pushing "4/5 Add visible HIBERNATE_INTERFACE..." under your own
authorship (as you did the refactoring anyway :) ). That way, you would
just have to take "5/5 fix XEN_SAVE_RESTORE Kconfig dependencies".
shriram
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