diff options
Diffstat (limited to 'mm/memory.c')
-rw-r--r-- | mm/memory.c | 52 |
1 files changed, 17 insertions, 35 deletions
diff --git a/mm/memory.c b/mm/memory.c index bc8bec762db7..e309153ffc5a 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -69,6 +69,10 @@ #include "internal.h" +#ifdef LAST_NID_NOT_IN_PAGE_FLAGS +#warning Unfortunate NUMA and NUMA Balancing config, growing page-frame for last_nid. +#endif + #ifndef CONFIG_NEED_MULTIPLE_NODES /* use the per-pgdat data instead for discontigmem - mbligh */ unsigned long max_mapnr; @@ -2990,17 +2994,16 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma, if (unlikely(!PageSwapCache(page) || page_private(page) != entry.val)) goto out_page; - if (ksm_might_need_to_copy(page, vma, address)) { - swapcache = page; - page = ksm_does_need_to_copy(page, vma, address); - - if (unlikely(!page)) { - ret = VM_FAULT_OOM; - page = swapcache; - swapcache = NULL; - goto out_page; - } + swapcache = page; + page = ksm_might_need_to_copy(page, vma, address); + if (unlikely(!page)) { + ret = VM_FAULT_OOM; + page = swapcache; + swapcache = NULL; + goto out_page; } + if (page == swapcache) + swapcache = NULL; if (mem_cgroup_try_charge_swapin(mm, page, GFP_KERNEL, &ptr)) { ret = VM_FAULT_OOM; @@ -3044,7 +3047,10 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma, } flush_icache_page(vma, page); set_pte_at(mm, address, page_table, pte); - do_page_add_anon_rmap(page, vma, address, exclusive); + if (swapcache) /* ksm created a completely new copy */ + page_add_new_anon_rmap(page, vma, address); + else + do_page_add_anon_rmap(page, vma, address, exclusive); /* It's better to call commit-charge after rmap is established */ mem_cgroup_commit_charge_swapin(page, ptr); @@ -3821,30 +3827,6 @@ int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address) } #endif /* __PAGETABLE_PMD_FOLDED */ -int make_pages_present(unsigned long addr, unsigned long end) -{ - int ret, len, write; - struct vm_area_struct * vma; - - vma = find_vma(current->mm, addr); - if (!vma) - return -ENOMEM; - /* - * We want to touch writable mappings with a write fault in order - * to break COW, except for shared mappings because these don't COW - * and we would not want to dirty them for nothing. - */ - write = (vma->vm_flags & (VM_WRITE | VM_SHARED)) == VM_WRITE; - BUG_ON(addr >= end); - BUG_ON(end > vma->vm_end); - len = DIV_ROUND_UP(end, PAGE_SIZE) - addr/PAGE_SIZE; - ret = get_user_pages(current, current->mm, addr, - len, write, 0, NULL, NULL); - if (ret < 0) - return ret; - return ret == len ? 0 : -EFAULT; -} - #if !defined(__HAVE_ARCH_GATE_AREA) #if defined(AT_SYSINFO_EHDR) |