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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2010-09-20 19:44:56 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2010-10-17 01:57:43 +0200 |
| commit | ac5c24ec1e983313ef0015258fba6f630e54e7cf (patch) | |
| tree | 0bd6e99ece68f27b322033fd2ecaea3fa2d9e369 /kernel/power | |
| parent | PM / Hibernate: Improve comments in hibernate_preallocate_memory() (diff) | |
| download | linux-ac5c24ec1e983313ef0015258fba6f630e54e7cf.tar.xz linux-ac5c24ec1e983313ef0015258fba6f630e54e7cf.zip | |
PM / Hibernate: Make default image size depend on total RAM size
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>
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/main.c | 1 | ||||
| -rw-r--r-- | kernel/power/power.h | 9 | ||||
| -rw-r--r-- | kernel/power/snapshot.c | 7 |
3 files changed, 15 insertions, 2 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c index 0a28d4db3597..f06ad6eff37a 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -321,6 +321,7 @@ static int __init pm_init(void) int error = pm_start_workqueue(); if (error) return error; + hibernate_image_size_init(); power_kobj = kobject_create_and_add("power", NULL); if (!power_kobj) return -ENOMEM; diff --git a/kernel/power/power.h b/kernel/power/power.h index c7e42e47eb0b..03634be55f62 100644 --- a/kernel/power/power.h +++ b/kernel/power/power.h @@ -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); diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index d9191b40cf6e..ac7eb109f196 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -46,7 +46,12 @@ static void swsusp_unset_page_forbidden(struct page *); * size will not exceed N bytes, but if that is impossible, it will * try to create the smallest image possible. */ -unsigned long image_size = 500 * 1024 * 1024; +unsigned long image_size; + +void __init hibernate_image_size_init(void) +{ + image_size = ((totalram_pages * 2) / 5) * PAGE_SIZE; +} /* List of PBEs needed for restoring the pages that were allocated before * the suspend and included in the suspend image, but have also been |