Messages in this thread Patch in this message | | | Date | Tue, 13 Feb 2007 20:29:54 -0800 (PST) | From | David Rientjes <> | Subject | [patch -mm] smaps: flush tlb only once for each vma |
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Flush the entire user address space from the TLB for each VMA in the task_struct list when clearing reference bits with /proc/pid/clear_refs. It's more efficient than flushing each page individually depending on pte_young().
Cc: Paul Mundt <lethal@linux-sh.org> Cc: Christoph Lameter <clameter@sgi.com> Signed-off-by: David Rientjes <rientjes@google.com> --- fs/proc/task_mmu.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -276,7 +276,6 @@ static void clear_refs_one_pmd(struct vm_area_struct *vma, pmd_t *pmd, if (pte_young(ptent)) { ptent = pte_mkold(ptent); set_pte_at(vma->vm_mm, addr, pte, ptent); - flush_tlb_page(vma, addr); } ClearPageReferenced(page); } @@ -358,6 +357,7 @@ void clear_refs_smap(struct mm_struct *mm) for (vma = mm->mmap; vma; vma = vma->vm_next) if (vma->vm_mm && !is_vm_hugetlb_page(vma)) for_each_pmd(vma, clear_refs_one_pmd, NULL); + flush_tlb_mm(mm); up_read(&mm->mmap_sem); } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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