Messages in this thread Patch in this message | | | From | Nigel Cunningham <> | Subject | [Suspend2][ 10/20] [Suspend2] Count pages in image parts. | Date | Tue, 27 Jun 2006 08:35:20 +1000 |
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Iterate over zones and pages, counting the number of pages of each type and populating the pageset1 and pageset1_copy bitmaps (the pages that will be atomically copied, and the destination pages for the copies).
Signed-off-by: Nigel Cunningham <nigel@suspend2.net>
kernel/power/prepare_image.c | 103 ++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 103 insertions(+), 0 deletions(-)
diff --git a/kernel/power/prepare_image.c b/kernel/power/prepare_image.c index 0030661..14ab1a4 100644 --- a/kernel/power/prepare_image.c +++ b/kernel/power/prepare_image.c @@ -240,3 +240,106 @@ static int size_of_free_region(struct pa return (posn - page); } +static struct page *rotext_start, *rotext_end; +static struct page *rodata_start, *rodata_end; +static struct page *nosave_start, *nosave_end; + +static __init int page_nosave_init(void) +{ + rodata_start = rodata_start_page(); + rodata_end = rodata_end_page(); + + rotext_start = rotext_start_page(); + rotext_end = rotext_end_page(); + + nosave_start = nosave_start_page(); + nosave_end = nosave_end_page(); + + return 0; +} + +subsys_initcall(page_nosave_init); + +/* count_data_pages + * + * This routine generates our lists of pages to be stored in each + * pageset. Since we store the data using extents, and adding new + * extents might allocate a new extent page, this routine may well + * be called more than once. + */ +static struct pageset_sizes_result count_data_pages(void) +{ + int num_free = 0; + unsigned long loop; + int use_pagedir2; + struct pageset_sizes_result result; + struct zone *zone; + + result.size1 = 0; + result.size1low = 0; + result.size2 = 0; + result.size2low = 0; + + num_nosave = 0; + + clear_dyn_pageflags(pageset1_map); + + generate_free_page_map(); + + if (test_result_state(SUSPEND_ABORTED)) + return result; + + /* + * Pages not to be saved are marked Nosave irrespective of being reserved + */ + for_each_zone(zone) { + for (loop = 0; loop < zone->spanned_pages; loop++) { + unsigned long pfn = zone->zone_start_pfn + loop; + struct page *page; + int chunk_size; + + if (!pfn_valid(pfn)) + continue; + + page = pfn_to_page(pfn); + chunk_size = size_of_free_region(page); + + if (PageNosave(page) || + (page >= rodata_start && page < rodata_end) || + (PageReserved(page) && + ((page >= nosave_start && page < nosave_end) || + is_highmem(zone)))) { + num_nosave++; + continue; + } + + if (chunk_size) { + num_free += chunk_size; + loop += chunk_size - 1; + continue; + } + + use_pagedir2 = PagePageset2(page); + + if (use_pagedir2) { + result.size2++; + if (!PageHighMem(page)) { + result.size2low++; + SetPagePageset1Copy(page); + } + } else { + result.size1++; + SetPagePageset1(page); + if (!PageHighMem(page)) + result.size1low++; + } + } + } + + suspend_message(SUSPEND_EAT_MEMORY, SUSPEND_MEDIUM, 0, + "Count data pages: Set1 (%d) + Set2 (%d) + Nosave (%d) + NumFree (%d) = %d.\n", + result.size1, result.size2, num_nosave, num_free, + result.size1 + result.size2 + num_nosave + num_free); + return result; +} + -- Nigel Cunningham nigel at suspend2 dot net - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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