diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/power/power.h | 2 | ||||
| -rw-r--r-- | kernel/power/snapshot.c | 78 | ||||
| -rw-r--r-- | kernel/power/swsusp.c | 6 |
3 files changed, 43 insertions, 43 deletions
diff --git a/kernel/power/power.h b/kernel/power/power.h index e54dd8435de..28afcb09014 100644 --- a/kernel/power/power.h +++ b/kernel/power/power.h @@ -69,4 +69,4 @@ extern int restore_highmem(void); extern void free_pagedir(struct pbe *pblist); extern struct pbe * alloc_pagedir(unsigned nr_pages); extern void create_pbe_list(struct pbe *pblist, unsigned nr_pages); -extern int enough_swap(void); +extern int enough_swap(unsigned nr_pages); diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index 0f0a7f306b0..03916cf3ff0 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -187,37 +187,38 @@ static int saveable(struct zone * zone, unsigned long * zone_pfn) return 1; } -static void count_data_pages(void) +static unsigned count_data_pages(void) { struct zone *zone; unsigned long zone_pfn; + unsigned n; - nr_copy_pages = 0; - + n = 0; for_each_zone (zone) { if (is_highmem(zone)) continue; mark_free_pages(zone); for (zone_pfn = 0; zone_pfn < zone->spanned_pages; ++zone_pfn) - nr_copy_pages += saveable(zone, &zone_pfn); + n += saveable(zone, &zone_pfn); } + return n; } -static void copy_data_pages(void) +static void copy_data_pages(struct pbe *pblist) { struct zone *zone; unsigned long zone_pfn; - struct pbe *pbe = pagedir_nosave, *p; + struct pbe *pbe, *p; - pr_debug("copy_data_pages(): pages to copy: %d\n", nr_copy_pages); + pbe = pblist; for_each_zone (zone) { if (is_highmem(zone)) continue; mark_free_pages(zone); /* This is necessary for swsusp_free() */ - for_each_pb_page (p, pagedir_nosave) + for_each_pb_page (p, pblist) SetPageNosaveFree(virt_to_page(p)); - for_each_pbe(p, pagedir_nosave) + for_each_pbe (p, pblist) SetPageNosaveFree(virt_to_page(p->address)); for (zone_pfn = 0; zone_pfn < zone->spanned_pages; ++zone_pfn) { if (saveable(zone, &zone_pfn)) { @@ -370,46 +371,39 @@ void swsusp_free(void) * free pages. */ -static int enough_free_mem(void) +static int enough_free_mem(unsigned nr_pages) { pr_debug("swsusp: available memory: %u pages\n", nr_free_pages()); - return nr_free_pages() > (nr_copy_pages + PAGES_FOR_IO + - nr_copy_pages/PBES_PER_PAGE + !!(nr_copy_pages%PBES_PER_PAGE)); + return nr_free_pages() > (nr_pages + PAGES_FOR_IO + + (nr_pages + PBES_PER_PAGE - 1) / PBES_PER_PAGE); } -static int swsusp_alloc(void) +static struct pbe *swsusp_alloc(unsigned nr_pages) { - struct pbe * p; - - pagedir_nosave = NULL; - - if (MAX_PBES < nr_copy_pages / PBES_PER_PAGE + - !!(nr_copy_pages % PBES_PER_PAGE)) - return -ENOSPC; + struct pbe *pblist, *p; - if (!(pagedir_save = alloc_pagedir(nr_copy_pages))) { + if (!(pblist = alloc_pagedir(nr_pages))) { printk(KERN_ERR "suspend: Allocating pagedir failed.\n"); - return -ENOMEM; + return NULL; } - create_pbe_list(pagedir_save, nr_copy_pages); - pagedir_nosave = pagedir_save; + create_pbe_list(pblist, nr_pages); - for_each_pbe (p, pagedir_save) { + for_each_pbe (p, pblist) { p->address = (unsigned long)alloc_image_page(); if (!p->address) { printk(KERN_ERR "suspend: Allocating image pages failed.\n"); swsusp_free(); - return -ENOMEM; + return NULL; } } - return 0; + return pblist; } static int suspend_prepare_image(void) { - int error; + unsigned nr_pages; pr_debug("swsusp: critical section: \n"); if (save_highmem()) { @@ -419,33 +413,37 @@ static int suspend_prepare_image(void) } drain_local_pages(); - count_data_pages(); - printk("swsusp: Need to copy %u pages\n", nr_copy_pages); + nr_pages = count_data_pages(); + printk("swsusp: Need to copy %u pages\n", nr_pages); pr_debug("swsusp: pages needed: %u + %lu + %u, free: %u\n", - nr_copy_pages, - nr_copy_pages/PBES_PER_PAGE + !!(nr_copy_pages%PBES_PER_PAGE), + nr_pages, + (nr_pages + PBES_PER_PAGE - 1) / PBES_PER_PAGE, PAGES_FOR_IO, nr_free_pages()); - if (!enough_free_mem()) { + /* This is needed because of the fixed size of swsusp_info */ + if (MAX_PBES < (nr_pages + PBES_PER_PAGE - 1) / PBES_PER_PAGE) + return -ENOSPC; + + if (!enough_free_mem(nr_pages)) { printk(KERN_ERR "swsusp: Not enough free memory\n"); return -ENOMEM; } - if (!enough_swap()) { + if (!enough_swap(nr_pages)) { printk(KERN_ERR "swsusp: Not enough free swap\n"); return -ENOSPC; } - error = swsusp_alloc(); - if (error) - return error; + pagedir_nosave = swsusp_alloc(nr_pages); + if (!pagedir_nosave) + return -ENOMEM; /* During allocating of suspend pagedir, new cold pages may appear. * Kill them. */ drain_local_pages(); - copy_data_pages(); + copy_data_pages(pagedir_nosave); /* * End of critical section. From now on, we can write to memory, @@ -453,7 +451,9 @@ static int suspend_prepare_image(void) * touch swap space! Except we must write out our image of course. */ - printk("swsusp: critical section/: done (%d pages copied)\n", nr_copy_pages ); + nr_copy_pages = nr_pages; + + printk("swsusp: critical section/: done (%d pages copied)\n", nr_pages); return 0; } diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c index fc50b5d2dd2..f6abfdb0a02 100644 --- a/kernel/power/swsusp.c +++ b/kernel/power/swsusp.c @@ -550,14 +550,14 @@ static int write_suspend_image(void) * We should only consider resume_device. */ -int enough_swap(void) +int enough_swap(unsigned nr_pages) { struct sysinfo i; si_swapinfo(&i); pr_debug("swsusp: available swap: %lu pages\n", i.freeswap); - return i.freeswap > (nr_copy_pages + PAGES_FOR_IO + - nr_copy_pages/PBES_PER_PAGE + !!(nr_copy_pages%PBES_PER_PAGE)); + return i.freeswap > (nr_pages + PAGES_FOR_IO + + (nr_pages + PBES_PER_PAGE - 1) / PBES_PER_PAGE); } |