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
1.9 KiB
C
78 lines
1.9 KiB
C
#ifndef _LINUX_SWSUSP_H
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#define _LINUX_SWSUSP_H
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#if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32)
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#include <asm/suspend.h>
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#endif
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#include <linux/swap.h>
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#include <linux/notifier.h>
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#include <linux/config.h>
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#include <linux/init.h>
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#include <linux/pm.h>
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/* page backup entry */
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typedef struct pbe {
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unsigned long address; /* address of the copy */
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unsigned long orig_address; /* original address of page */
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struct pbe *next;
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} suspend_pagedir_t;
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#define for_each_pbe(pbe, pblist) \
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for (pbe = pblist ; pbe ; pbe = pbe->next)
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#define PBES_PER_PAGE (PAGE_SIZE/sizeof(struct pbe))
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#define PB_PAGE_SKIP (PBES_PER_PAGE-1)
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#define for_each_pb_page(pbe, pblist) \
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for (pbe = pblist ; pbe ; pbe = (pbe+PB_PAGE_SKIP)->next)
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#define SWAP_FILENAME_MAXLENGTH 32
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extern dev_t swsusp_resume_device;
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/* mm/vmscan.c */
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extern int shrink_mem(void);
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/* mm/page_alloc.c */
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extern void drain_local_pages(void);
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extern void mark_free_pages(struct zone *zone);
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#ifdef CONFIG_PM
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/* kernel/power/swsusp.c */
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extern int software_suspend(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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#else
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static inline int software_suspend(void)
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{
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printk("Warning: fake suspend called\n");
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return -EPERM;
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}
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#endif
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#ifdef CONFIG_SUSPEND_SMP
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extern void disable_nonboot_cpus(void);
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extern void enable_nonboot_cpus(void);
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#else
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static inline void disable_nonboot_cpus(void) {}
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static inline void enable_nonboot_cpus(void) {}
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#endif
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void save_processor_state(void);
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void restore_processor_state(void);
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struct saved_context;
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void __save_processor_state(struct saved_context *ctxt);
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void __restore_processor_state(struct saved_context *ctxt);
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unsigned long get_safe_page(gfp_t gfp_mask);
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/*
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* XXX: We try to keep some more pages free so that I/O operations succeed
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* without paging. Might this be more?
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*/
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#define PAGES_FOR_IO 1024
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#endif /* _LINUX_SWSUSP_H */
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