forked from Minki/linux
72a97e0839
This patch makes swsusp free only as much memory as needed to complete the suspend and not as much as possible. In the most of cases this should speed up the suspend and make the system much more responsive after resume, especially if a GUI (eg. X Windows) is used. If needed, the old behavior (ie to free as much memory as possible during suspend) can be restored by unsetting FAST_FREE in power.h Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
#include <linux/suspend.h>
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#include <linux/utsname.h>
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/* With SUSPEND_CONSOLE defined suspend looks *really* cool, but
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we probably do not take enough locks for switching consoles, etc,
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so bad things might happen.
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*/
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#if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
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#define SUSPEND_CONSOLE (MAX_NR_CONSOLES-1)
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#endif
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struct swsusp_info {
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struct new_utsname uts;
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u32 version_code;
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unsigned long num_physpages;
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int cpus;
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unsigned long image_pages;
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unsigned long pages;
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swp_entry_t start;
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} __attribute__((aligned(PAGE_SIZE)));
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#ifdef CONFIG_SOFTWARE_SUSPEND
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extern int pm_suspend_disk(void);
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#else
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static inline int pm_suspend_disk(void)
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{
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return -EPERM;
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}
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#endif
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extern struct semaphore pm_sem;
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#define power_attr(_name) \
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static struct subsys_attribute _name##_attr = { \
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.attr = { \
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.name = __stringify(_name), \
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.mode = 0644, \
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}, \
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.show = _name##_show, \
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.store = _name##_store, \
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}
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extern struct subsystem power_subsys;
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extern int freeze_processes(void);
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extern void thaw_processes(void);
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extern int pm_prepare_console(void);
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extern void pm_restore_console(void);
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/* References to section boundaries */
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extern const void __nosave_begin, __nosave_end;
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extern unsigned int nr_copy_pages;
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extern struct pbe *pagedir_nosave;
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/*
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* This compilation switch determines the way in which memory will be freed
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* during suspend. If defined, only as much memory will be freed as needed
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* to complete the suspend, which will make it go faster. Otherwise, the
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* largest possible amount of memory will be freed.
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*/
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#define FAST_FREE 1
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extern asmlinkage int swsusp_arch_suspend(void);
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extern asmlinkage int swsusp_arch_resume(void);
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extern unsigned int count_data_pages(void);
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extern void free_pagedir(struct pbe *pblist);
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extern void release_eaten_pages(void);
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extern struct pbe *alloc_pagedir(unsigned nr_pages, gfp_t gfp_mask, int safe_needed);
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extern void swsusp_free(void);
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extern int alloc_data_pages(struct pbe *pblist, gfp_t gfp_mask, int safe_needed);
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extern unsigned int snapshot_nr_pages(void);
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extern struct pbe *snapshot_pblist(void);
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extern void snapshot_pblist_set(struct pbe *pblist);
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