diff options
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 33 |
1 files changed, 16 insertions, 17 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 0922ef5d2e46..15ea511fb41c 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4165,11 +4165,12 @@ retry: alloc_flags = reserve_flags; /* - * Reset the zonelist iterators if memory policies can be ignored. - * These allocations are high priority and system rather than user - * orientated. + * Reset the nodemask and zonelist iterators if memory policies can be + * ignored. These allocations are high priority and system rather than + * user oriented. */ if (!(alloc_flags & ALLOC_CPUSET) || reserve_flags) { + ac->nodemask = NULL; ac->preferred_zoneref = first_zones_zonelist(ac->zonelist, ac->high_zoneidx, ac->nodemask); } @@ -4403,19 +4404,15 @@ out: EXPORT_SYMBOL(__alloc_pages_nodemask); /* - * Common helper functions. + * Common helper functions. Never use with __GFP_HIGHMEM because the returned + * address cannot represent highmem pages. Use alloc_pages and then kmap if + * you need to access high mem. */ unsigned long __get_free_pages(gfp_t gfp_mask, unsigned int order) { struct page *page; - /* - * __get_free_pages() returns a virtual address, which cannot represent - * a highmem page - */ - VM_BUG_ON((gfp_mask & __GFP_HIGHMEM) != 0); - - page = alloc_pages(gfp_mask, order); + page = alloc_pages(gfp_mask & ~__GFP_HIGHMEM, order); if (!page) return 0; return (unsigned long) page_address(page); @@ -5567,13 +5564,12 @@ static int zone_batchsize(struct zone *zone) /* * The per-cpu-pages pools are set to around 1000th of the - * size of the zone. But no more than 1/2 of a meg. - * - * OK, so we don't know how big the cache is. So guess. + * size of the zone. */ batch = zone->managed_pages / 1024; - if (batch * PAGE_SIZE > 512 * 1024) - batch = (512 * 1024) / PAGE_SIZE; + /* But no more than a meg. */ + if (batch * PAGE_SIZE > 1024 * 1024) + batch = (1024 * 1024) / PAGE_SIZE; batch /= 4; /* We effectively *= 4 below */ if (batch < 1) batch = 1; @@ -6405,8 +6401,11 @@ void __paginginit zero_resv_unavail(void) pgcnt = 0; for_each_resv_unavail_range(i, &start, &end) { for (pfn = PFN_DOWN(start); pfn < PFN_UP(end); pfn++) { - if (!pfn_valid(ALIGN_DOWN(pfn, pageblock_nr_pages))) + if (!pfn_valid(ALIGN_DOWN(pfn, pageblock_nr_pages))) { + pfn = ALIGN_DOWN(pfn, pageblock_nr_pages) + + pageblock_nr_pages - 1; continue; + } mm_zero_struct_page(pfn_to_page(pfn)); pgcnt++; } |