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PM / Hibernate: Make default image size depend on total RAM size

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The default hibernation image size is currently hard coded and euqal
to 500 MB, which is not a reasonable default on many contemporary
systems.  Make it equal 2/5 of the total RAM size (this is slightly
below the maximum, i.e. 1/2 of the total RAM size, and seems to be
generally suitable).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Tested-by: M. Vefa Bicakci <bicave@superonline.com>
This commit is contained in:
Rafael J. Wysocki
2010-09-20 19:44:56 +02:00
parent 266f1a25ef
commit ac5c24ec1e
4 changed files with 16 additions and 3 deletions
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9
kernel/power/power.h
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@ -14,6 +14,9 @@ struct swsusp_info {
} __attribute__((aligned(PAGE_SIZE)));
#ifdef CONFIG_HIBERNATION
/* kernel/power/snapshot.c */
extern void __init hibernate_image_size_init(void);
#ifdef CONFIG_ARCH_HIBERNATION_HEADER
/* Maximum size of architecture specific data in a hibernation header */
#define MAX_ARCH_HEADER_SIZE (sizeof(struct new_utsname) + 4)
@ -49,7 +52,11 @@ static inline char *check_image_kernel(struct swsusp_info *info)
extern int hibernation_snapshot(int platform_mode);
extern int hibernation_restore(int platform_mode);
extern int hibernation_platform_enter(void);
#endif
#else /* !CONFIG_HIBERNATION */
static inline void hibernate_image_size_init(void) {}
#endif /* !CONFIG_HIBERNATION */
extern int pfn_is_nosave(unsigned long);