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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: linux-mm@kvack.org, akpm@linux-foundation.org
Cc: linuxppc-dev@lists.ozlabs.org,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
	Anshuman Khandual <anshuman.khandual@arm.com>
Subject: [PATCH 05/16] debug_vm_pgtable/savedwrite: Enable savedwrite test with CONFIG_NUMA_BALANCING
Date: Wed, 12 Aug 2020 12:03:47 +0530	[thread overview]
Message-ID: <20200812063358.369514-5-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20200812063358.369514-1-aneesh.kumar@linux.ibm.com>

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.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 mm/debug_vm_pgtable.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
index 679bb3d289a3..de8a62d0a931 100644
--- a/mm/debug_vm_pgtable.c
+++ b/mm/debug_vm_pgtable.c
@@ -110,6 +110,7 @@ static void __init pte_advanced_tests(struct mm_struct *mm,
 	WARN_ON(pte_young(pte));
 }
 
+#ifdef CONFIG_NUMA_BALANCING
 static void __init pte_savedwrite_tests(unsigned long pfn, pgprot_t prot)
 {
 	pte_t pte = pfn_pte(pfn, prot);
@@ -118,6 +119,8 @@ static void __init pte_savedwrite_tests(unsigned long pfn, pgprot_t prot)
 	WARN_ON(!pte_savedwrite(pte_mk_savedwrite(pte_clear_savedwrite(pte))));
 	WARN_ON(pte_savedwrite(pte_clear_savedwrite(pte_mk_savedwrite(pte))));
 }
+#endif
+
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 static void __init pmd_basic_tests(unsigned long pfn, pgprot_t prot)
 {
@@ -221,6 +224,7 @@ static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn, pgprot_t prot)
 	WARN_ON(!pmd_none(pmd));
 }
 
+#ifdef CONFIG_NUMA_BALANCING
 static void __init pmd_savedwrite_tests(unsigned long pfn, pgprot_t prot)
 {
 	pmd_t pmd = pfn_pmd(pfn, prot);
@@ -229,6 +233,7 @@ static void __init pmd_savedwrite_tests(unsigned long pfn, pgprot_t prot)
 	WARN_ON(!pmd_savedwrite(pmd_mk_savedwrite(pmd_clear_savedwrite(pmd))));
 	WARN_ON(pmd_savedwrite(pmd_clear_savedwrite(pmd_mk_savedwrite(pmd))));
 }
+#endif
 
 #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
 static void __init pud_basic_tests(unsigned long pfn, pgprot_t prot)
@@ -1005,8 +1010,10 @@ static int __init debug_vm_pgtable(void)
 	pmd_huge_tests(pmdp, pmd_aligned, prot);
 	pud_huge_tests(pudp, pud_aligned, prot);
 
+#ifdef CONFIG_NUMA_BALANCING
 	pte_savedwrite_tests(pte_aligned, prot);
 	pmd_savedwrite_tests(pmd_aligned, prot);
+#endif
 
 	pte_unmap_unlock(ptep, ptl);
 
-- 
2.26.2


  parent reply	other threads:[~2020-08-12  6:43 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-12  6:33 [PATCH 01/16] powerpc/mm: Add DEBUG_VM WARN for pmd_clear Aneesh Kumar K.V
2020-08-12  6:33 ` [PATCH 02/16] debug_vm_pgtable/ppc64: Avoid setting top bits in radom value Aneesh Kumar K.V
2020-08-12  6:40   ` Christophe Leroy
2020-08-12  6:43     ` Aneesh Kumar K.V
2020-08-12  8:12   ` Anshuman Khandual
2020-08-12  8:25     ` Aneesh Kumar K.V
2020-08-12  6:33 ` [PATCH 03/16] debug_vm_pgtable/set_pte: Don't use set_pte_at to update an existing pte entry Aneesh Kumar K.V
2020-08-12  9:12   ` Anshuman Khandual
2020-08-12  9:22     ` Aneesh Kumar K.V
2020-08-12  6:33 ` [PATCH 04/16] debug_vm_pgtables/hugevmap: Use the arch helper to identify huge vmap support Aneesh Kumar K.V
2020-08-12 10:30   ` Anshuman Khandual
2020-08-12  6:33 ` Aneesh Kumar K.V [this message]
2020-08-12 11:24   ` [PATCH 05/16] debug_vm_pgtable/savedwrite: Enable savedwrite test with CONFIG_NUMA_BALANCING Anshuman Khandual
2020-08-12  6:33 ` [PATCH 06/16] debug_vm_pgtable/THP: Mark the pte entry huge before using set_pmd_at Aneesh Kumar K.V
2020-08-12  6:33 ` [PATCH 07/16] debug_vm_pgtable/THP: Mark the pte entry huge before using set_pud_at Aneesh Kumar K.V
2020-08-12 11:49   ` Anshuman Khandual
2020-08-12  6:33 ` [PATCH 08/16] debug_vm_pgtable/set_pmd: Don't use set_pmd_at to update an existing pmd entry Aneesh Kumar K.V
2020-08-12 12:46   ` Anshuman Khandual
2020-08-12  6:33 ` [PATCH 09/16] debug_vm_pgtable/set_pud: Don't use set_pud_at to update an existing pud entry Aneesh Kumar K.V
2020-08-12 12:46   ` Anshuman Khandual
2020-08-12  6:33 ` [PATCH 10/16] debug_vm_pgtable/thp: Use page table depost/withdraw with THP Aneesh Kumar K.V
2020-08-13  5:25   ` Anshuman Khandual
2020-08-13  6:38     ` Aneesh Kumar K.V
2020-08-12  6:33 ` [PATCH 11/16] debug_vm_pgtable/locks: Move non page table modifying test together Aneesh Kumar K.V
2020-08-12  6:33 ` [PATCH 12/16] debug_vm_pgtable/locks: Take correct page table lock Aneesh Kumar K.V
2020-08-12  6:33 ` [PATCH 13/16] debug_vm_pgtable/pmd_clear: Don't use pmd/pud_clear on pte entries Aneesh Kumar K.V
2020-08-13  5:27   ` Anshuman Khandual
2020-08-13  8:45     ` Aneesh Kumar K.V
2020-08-12  6:33 ` [PATCH 14/16] debug_vm_pgtable/hugetlb: Disable hugetlb test on ppc64 Aneesh Kumar K.V
2020-08-12 13:03   ` Anshuman Khandual
2020-08-12 13:16     ` Aneesh Kumar K.V
2020-08-12 13:34       ` Anshuman Khandual
2020-08-12 13:52         ` Aneesh Kumar K.V
2020-08-14  8:43           ` Anshuman Khandual
2020-08-19  6:54             ` Aneesh Kumar K.V
2020-08-12  6:33 ` [PATCH 15/16] debug_vm_pgtable/savedwrite: Use savedwrite test with protnone ptes Aneesh Kumar K.V
2020-08-12 13:06   ` Anshuman Khandual
2020-08-12  6:33 ` [PATCH 16/16] debug_vm_pgtable/ppc64: Add a variant of pfn_pte/pmd Aneesh Kumar K.V
2020-08-13  5:30   ` Anshuman Khandual
2020-08-13  6:37     ` Aneesh Kumar K.V
2020-08-14  8:29       ` Anshuman Khandual
2020-08-12  7:46 ` [PATCH 01/16] powerpc/mm: Add DEBUG_VM WARN for pmd_clear Anshuman Khandual
2020-08-12  8:27   ` Aneesh Kumar K.V

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