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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2014-02-12 09:13:37 +0530 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-02-17 11:19:36 +1100 |
| commit | 9d85d5863fa4818eb7fa306563bf830c0210c3a6 (patch) | |
| tree | 706890940e30e706bf4237bc02ef46600fa30462 /mm/mprotect.c | |
| parent | 88247e8d7ba6639f2c199e147ebbc91f7673150c (diff) | |
| download | linux-9d85d5863fa4818eb7fa306563bf830c0210c3a6.tar.gz linux-9d85d5863fa4818eb7fa306563bf830c0210c3a6.tar.bz2 linux-9d85d5863fa4818eb7fa306563bf830c0210c3a6.zip | |
mm: Dirty accountable change only apply to non prot numa case
So move it within the if loop
Acked-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'mm/mprotect.c')
| -rw-r--r-- | mm/mprotect.c | 21 |
1 files changed, 7 insertions, 14 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c index 7332c1785744..33eab902f10e 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -58,6 +58,13 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd, if (pte_numa(ptent)) ptent = pte_mknonnuma(ptent); ptent = pte_modify(ptent, newprot); + /* + * Avoid taking write faults for pages we + * know to be dirty. + */ + if (dirty_accountable && pte_dirty(ptent)) + ptent = pte_mkwrite(ptent); + ptep_modify_prot_commit(mm, addr, pte, ptent); updated = true; } else { struct page *page; @@ -72,22 +79,8 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd, } } } - - /* - * Avoid taking write faults for pages we know to be - * dirty. - */ - if (dirty_accountable && pte_dirty(ptent)) { - ptent = pte_mkwrite(ptent); - updated = true; - } - if (updated) pages++; - - /* Only !prot_numa always clears the pte */ - if (!prot_numa) - ptep_modify_prot_commit(mm, addr, pte, ptent); } else if (IS_ENABLED(CONFIG_MIGRATION) && !pte_file(oldpte)) { swp_entry_t entry = pte_to_swp_entry(oldpte); |