diff options
| -rw-r--r-- | include/linux/suspend.h | 6 | ||||
| -rw-r--r-- | kernel/power/power.h | 12 | ||||
| -rw-r--r-- | kernel/power/swsusp.c | 2 |
3 files changed, 12 insertions, 8 deletions
diff --git a/include/linux/suspend.h b/include/linux/suspend.h index 3aecc96acc7..96868be9c21 100644 --- a/include/linux/suspend.h +++ b/include/linux/suspend.h @@ -52,10 +52,4 @@ struct saved_context; void __save_processor_state(struct saved_context *ctxt); void __restore_processor_state(struct saved_context *ctxt); -/* - * XXX: We try to keep some more pages free so that I/O operations succeed - * without paging. Might this be more? - */ -#define PAGES_FOR_IO 1024 - #endif /* _LINUX_SWSUSP_H */ diff --git a/kernel/power/power.h b/kernel/power/power.h index a3e47cbdaf3..34b43542785 100644 --- a/kernel/power/power.h +++ b/kernel/power/power.h @@ -14,8 +14,18 @@ struct swsusp_info { #ifdef CONFIG_SOFTWARE_SUSPEND -extern int pm_suspend_disk(void); +/* + * Keep some memory free so that I/O operations can succeed without paging + * [Might this be more than 4 MB?] + */ +#define PAGES_FOR_IO ((4096 * 1024) >> PAGE_SHIFT) +/* + * Keep 1 MB of memory free so that device drivers can allocate some pages in + * their .suspend() routines without breaking the suspend to disk. + */ +#define SPARE_PAGES ((1024 * 1024) >> PAGE_SHIFT) +extern int pm_suspend_disk(void); #else static inline int pm_suspend_disk(void) { diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c index 1109023d835..5da304c8f1f 100644 --- a/kernel/power/swsusp.c +++ b/kernel/power/swsusp.c @@ -233,7 +233,7 @@ int swsusp_shrink_memory(void) long size, highmem_size; highmem_size = count_highmem_pages(); - size = count_data_pages() + PAGES_FOR_IO; + size = count_data_pages() + PAGES_FOR_IO + SPARE_PAGES; tmp = size; size += highmem_size; for_each_zone (zone) |