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From: David Rientjes <>
To: Andrew Morton <>
Cc: Paul Mundt <>,
	Christoph Lameter <>,
Subject: [patch -mm] smaps: flush tlb only once for each vma
Date: Tue, 13 Feb 2007 20:29:54 -0800 (PST)	[thread overview]
Message-ID: <> (raw)

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 

Cc: Paul Mundt <>
Cc: Christoph Lameter <>
Signed-off-by: David Rientjes <>
 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);
@@ -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);

                 reply	other threads:[~2007-02-14  4:30 UTC|newest]

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