* [merged] mm-debug_vm_pgtable-savedwrite-enable-savedwrite-test-with-config_numa_balancing.patch removed from -mm tree
@ 2020-10-16 20:47 akpm
0 siblings, 0 replies; only message in thread
From: akpm @ 2020-10-16 20:47 UTC (permalink / raw)
To: aneesh.kumar, anshuman.khandual, christophe.leroy, mm-commits, mpe
The patch titled
Subject: mm/debug_vm_pgtable/savedwrite: enable savedwrite test with CONFIG_NUMA_BALANCING
has been removed from the -mm tree. Its filename was
mm-debug_vm_pgtable-savedwrite-enable-savedwrite-test-with-config_numa_balancing.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Subject: mm/debug_vm_pgtable/savedwrite: enable savedwrite test with CONFIG_NUMA_BALANCING
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. Hence enable the test only when CONFIG_NUMA_BALANCING is enabled
and use protnone protflags.
Link: https://lkml.kernel.org/r/20200902114222.181353-6-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/debug_vm_pgtable.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
--- a/mm/debug_vm_pgtable.c~mm-debug_vm_pgtable-savedwrite-enable-savedwrite-test-with-config_numa_balancing
+++ a/mm/debug_vm_pgtable.c
@@ -119,10 +119,14 @@ static void __init pte_savedwrite_tests(
{
pte_t pte = pfn_pte(pfn, prot);
+ if (!IS_ENABLED(CONFIG_NUMA_BALANCING))
+ return;
+
pr_debug("Validating PTE saved write\n");
WARN_ON(!pte_savedwrite(pte_mk_savedwrite(pte_clear_savedwrite(pte))));
WARN_ON(pte_savedwrite(pte_clear_savedwrite(pte_mk_savedwrite(pte))));
}
+
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
static void __init pmd_basic_tests(unsigned long pfn, pgprot_t prot)
{
@@ -234,6 +238,9 @@ static void __init pmd_savedwrite_tests(
{
pmd_t pmd = pfn_pmd(pfn, prot);
+ if (!IS_ENABLED(CONFIG_NUMA_BALANCING))
+ return;
+
pr_debug("Validating PMD saved write\n");
WARN_ON(!pmd_savedwrite(pmd_mk_savedwrite(pmd_clear_savedwrite(pmd))));
WARN_ON(pmd_savedwrite(pmd_clear_savedwrite(pmd_mk_savedwrite(pmd))));
@@ -1019,8 +1026,8 @@ static int __init debug_vm_pgtable(void)
pmd_huge_tests(pmdp, pmd_aligned, prot);
pud_huge_tests(pudp, pud_aligned, prot);
- pte_savedwrite_tests(pte_aligned, prot);
- pmd_savedwrite_tests(pmd_aligned, prot);
+ pte_savedwrite_tests(pte_aligned, protnone);
+ pmd_savedwrite_tests(pmd_aligned, protnone);
pte_unmap_unlock(ptep, ptl);
_
Patches currently in -mm which might be from aneesh.kumar@linux.ibm.com are
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2020-10-16 20:47 [merged] mm-debug_vm_pgtable-savedwrite-enable-savedwrite-test-with-config_numa_balancing.patch removed from -mm tree akpm
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