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SubjectRe: [patch 2/5]thp: remove unnecessary tlb flush for mprotect
On Tue, Oct 25, 2011 at 10:59:25AM +0800, Shaohua Li wrote:
> change_protection() will do TLB flush later, don't need duplicate tlb flush.
>
> Signed-off-by: Shaohua Li <shaohua.li@intel.com>
> ---
> mm/huge_memory.c | 1 -
> 1 file changed, 1 deletion(-)
>
> Index: linux/mm/huge_memory.c
> ===================================================================
> --- linux.orig/mm/huge_memory.c 2011-10-24 19:24:31.000000000 +0800
> +++ linux/mm/huge_memory.c 2011-10-24 19:25:10.000000000 +0800
> @@ -1079,7 +1079,6 @@ int change_huge_pmd(struct vm_area_struc
> entry = pmd_modify(entry, newprot);
> set_pmd_at(mm, addr, pmd, entry);
> spin_unlock(&vma->vm_mm->page_table_lock);
> - flush_tlb_range(vma, addr, addr + HPAGE_PMD_SIZE);
> ret = 1;
> }
> } else

Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>


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