| Message ID | 20200812063358.369514-15-aneesh.kumar@linux.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [01/16] powerpc/mm: Add DEBUG_VM WARN for pmd_clear | expand |
On 08/12/2020 12:03 PM, Aneesh Kumar K.V wrote: > Saved write support was added to track the write bit of a pte after marking the > pte protnone. This was done so that AUTONUMA can convert a write pte to protnone > and still track the old write bit. When converting it back we set the pte write > bit correctly thereby avoiding a write fault again. > > Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> > --- > mm/debug_vm_pgtable.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c > index 3e112d0ba1b2..eea62d5e503b 100644 > --- a/mm/debug_vm_pgtable.c > +++ b/mm/debug_vm_pgtable.c > @@ -1006,8 +1006,8 @@ static int __init debug_vm_pgtable(void) > pud_leaf_tests(pud_aligned, prot); > > #ifdef CONFIG_NUMA_BALANCING > - pte_savedwrite_tests(pte_aligned, prot); > - pmd_savedwrite_tests(pmd_aligned, prot); > + pte_savedwrite_tests(pte_aligned, protnone); > + pmd_savedwrite_tests(pmd_aligned, protnone); > #endif > pte_special_tests(pte_aligned, prot); > pte_protnone_tests(pte_aligned, protnone); > This can be folded back with [PATCH 5/16] which now checks for CONFIG_NUMA_BALANCING in pxx_savedwrite_tests().
diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c index 3e112d0ba1b2..eea62d5e503b 100644 --- a/mm/debug_vm_pgtable.c +++ b/mm/debug_vm_pgtable.c @@ -1006,8 +1006,8 @@ static int __init debug_vm_pgtable(void) pud_leaf_tests(pud_aligned, prot); #ifdef CONFIG_NUMA_BALANCING - pte_savedwrite_tests(pte_aligned, prot); - pmd_savedwrite_tests(pmd_aligned, prot); + pte_savedwrite_tests(pte_aligned, protnone); + pmd_savedwrite_tests(pmd_aligned, protnone); #endif pte_special_tests(pte_aligned, prot); pte_protnone_tests(pte_aligned, protnone);
Saved write support was added to track the write bit of a pte after marking the pte protnone. This was done so that AUTONUMA can convert a write pte to protnone and still track the old write bit. When converting it back we set the pte write bit correctly thereby avoiding a write fault again. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> --- mm/debug_vm_pgtable.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)