The patch titled
smaps: flush tlb only once for each vma
has been added to the -mm tree. Its filename is
smaps-add-clear_refs-file-to-clear-reference-fix-fix.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: smaps: flush tlb only once for each vma
From: David Rientjes <rientjes@xxxxxxxxxx>
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@xxxxxxxxxxxx>
Cc: Christoph Lameter <clameter@xxxxxxx>
Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/proc/task_mmu.c~smaps-add-clear_refs-file-to-clear-reference-fix-fix fs/proc/task_mmu.c
--- a/fs/proc/task_mmu.c~smaps-add-clear_refs-file-to-clear-reference-fix-fix
+++ a/fs/proc/task_mmu.c
@@ -276,7 +276,6 @@ static void clear_refs_one_pmd(struct vm
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 *m
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);
}
_
Patches currently in -mm which might be from rientjes@xxxxxxxxxx are
smaps-extract-pmd-walker-from-smaps-code.patch
smaps-add-pages-referenced-count-to-smaps.patch
smaps-add-clear_refs-file-to-clear-reference.patch
smaps-add-clear_refs-file-to-clear-reference-fix.patch
smaps-add-clear_refs-file-to-clear-reference-fix-fix.patch
smaps-add-clear_refs-file-to-clear-reference-docs.patch
-
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