Messages in this thread | | | Date | Fri, 03 May 2013 19:36:23 +0800 | From | Xiao Guangrong <> | Subject | Re: [PATCH 4/5] mm: soft-dirty bits for user memory changes tracking |
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On 05/01/2013 12:12 AM, Pavel Emelyanov wrote:
> +static inline void clear_soft_dirty(struct vm_area_struct *vma, > + unsigned long addr, pte_t *pte) > +{ > +#ifdef CONFIG_MEM_SOFT_DIRTY > + /* > + * The soft-dirty tracker uses #PF-s to catch writes > + * to pages, so write-protect the pte as well. See the > + * Documentation/vm/soft-dirty.txt for full description > + * of how soft-dirty works. > + */ > + pte_t ptent = *pte; > + ptent = pte_wrprotect(ptent); > + ptent = pte_clear_flags(ptent, _PAGE_SOFT_DIRTY); > + set_pte_at(vma->vm_mm, addr, pte, ptent); > +#endif
It seems that TLBs are not flushed and mmu-notification is not called?
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