diff options
| -rw-r--r-- | kernel/power/snapshot.c | 54 |
1 files changed, 39 insertions, 15 deletions
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index f1604d8cf489..791a61892bb5 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -725,6 +725,14 @@ static void memory_bm_clear_bit(struct memory_bitmap *bm, unsigned long pfn) clear_bit(bit, addr); } +static void memory_bm_clear_current(struct memory_bitmap *bm) +{ + int bit; + + bit = max(bm->cur.node_bit - 1, 0); + clear_bit(bit, bm->cur.node->data); +} + static int memory_bm_test_bit(struct memory_bitmap *bm, unsigned long pfn) { void *addr; @@ -1333,23 +1341,39 @@ static struct memory_bitmap copy_bm; void swsusp_free(void) { - struct zone *zone; - unsigned long pfn, max_zone_pfn; + unsigned long fb_pfn, fr_pfn; - for_each_populated_zone(zone) { - max_zone_pfn = zone_end_pfn(zone); - for (pfn = zone->zone_start_pfn; pfn < max_zone_pfn; pfn++) - if (pfn_valid(pfn)) { - struct page *page = pfn_to_page(pfn); - - if (swsusp_page_is_forbidden(page) && - swsusp_page_is_free(page)) { - swsusp_unset_page_forbidden(page); - swsusp_unset_page_free(page); - __free_page(page); - } - } + if (!forbidden_pages_map || !free_pages_map) + goto out; + + memory_bm_position_reset(forbidden_pages_map); + memory_bm_position_reset(free_pages_map); + +loop: + fr_pfn = memory_bm_next_pfn(free_pages_map); + fb_pfn = memory_bm_next_pfn(forbidden_pages_map); + + /* + * Find the next bit set in both bitmaps. This is guaranteed to + * terminate when fb_pfn == fr_pfn == BM_END_OF_MAP. + */ + do { + if (fb_pfn < fr_pfn) + fb_pfn = memory_bm_next_pfn(forbidden_pages_map); + if (fr_pfn < fb_pfn) + fr_pfn = memory_bm_next_pfn(free_pages_map); + } while (fb_pfn != fr_pfn); + + if (fr_pfn != BM_END_OF_MAP && pfn_valid(fr_pfn)) { + struct page *page = pfn_to_page(fr_pfn); + + memory_bm_clear_current(forbidden_pages_map); + memory_bm_clear_current(free_pages_map); + __free_page(page); + goto loop; } + +out: nr_copy_pages = 0; nr_meta_pages = 0; restore_pblist = NULL; |