Messages in this thread Patch in this message | | | From | Jianyu Zhan <> | Subject | [PATCH] mm: use a irq-safe __mod_zone_page_state in mlocked_vma_newpage() | Date | Fri, 9 May 2014 23:17:48 +0800 |
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mlocked_vma_newpage() is only called in fault path by page_add_new_anon_rmap(), which is called on a *new* page. And such page is initially only visible via the pagetables, and the pte is locked while calling page_add_new_anon_rmap(), so we could use a irq-safe version of __mod_zone_page_state() here.
Signed-off-by: Jianyu Zhan <nasa4836@gmail.com> --- mm/internal.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/internal.h b/mm/internal.h index 07b6736..69079b1 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -196,7 +196,7 @@ static inline int mlocked_vma_newpage(struct vm_area_struct *vma, return 0; if (!TestSetPageMlocked(page)) { - mod_zone_page_state(page_zone(page), NR_MLOCK, + __mod_zone_page_state(page_zone(page), NR_MLOCK, hpage_nr_pages(page)); count_vm_event(UNEVICTABLE_PGMLOCKED); } -- 2.0.0-rc1
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