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From: Gavin Shan <gshan@redhat.com>
To: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org, anshuman.khandual@arm.com,
	catalin.marinas@arm.com, will@kernel.org,
	akpm@linux-foundation.org, shan.gavin@gmail.com,
	chuhu@redhat.com
Subject: [PATCH 06/12] mm/debug_vm_pgtable: Use struct vm_pgtable_debug in migration and thp tests
Date: Tue,  6 Jul 2021 14:17:42 +0800	[thread overview]
Message-ID: <20210706061748.161258-7-gshan@redhat.com> (raw)
In-Reply-To: <20210706061748.161258-1-gshan@redhat.com>

This uses struct vm_pgtable_debug in the migration and thp test
functions. It's notable that the pre-allocated page is used in
swap_migration_tests() as set_pte_at() is used there.

Signed-off-by: Gavin Shan <gshan@redhat.com>
---
 mm/debug_vm_pgtable.c | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
index eb0a836a73ad..757d2d9c4e93 100644
--- a/mm/debug_vm_pgtable.c
+++ b/mm/debug_vm_pgtable.c
@@ -844,7 +844,7 @@ static void __init pmd_swap_tests(struct vm_pgtable_debug *debug)
 static void __init pmd_swap_tests(struct vm_pgtable_debug *debug) { }
 #endif /* CONFIG_ARCH_ENABLE_THP_MIGRATION */
 
-static void __init swap_migration_tests(void)
+static void __init swap_migration_tests(struct vm_pgtable_debug *debug)
 {
 	struct page *page;
 	swp_entry_t swp;
@@ -860,9 +860,10 @@ static void __init swap_migration_tests(void)
 	 * problematic. Lets allocate a dedicated page explicitly for this
 	 * purpose that will be freed subsequently.
 	 */
-	page = alloc_page(GFP_KERNEL);
+	page = (debug->pte_pfn != ULONG_MAX) ?
+	       pfn_to_page(debug->pte_pfn) : NULL;
 	if (!page) {
-		pr_err("page allocation failed\n");
+		pr_err("no page available\n");
 		return;
 	}
 
@@ -883,7 +884,6 @@ static void __init swap_migration_tests(void)
 	WARN_ON(!is_migration_entry(swp));
 	WARN_ON(is_writable_migration_entry(swp));
 	__ClearPageLocked(page);
-	__free_page(page);
 }
 
 #ifdef CONFIG_HUGETLB_PAGE
@@ -915,7 +915,7 @@ static void __init hugetlb_basic_tests(struct vm_pgtable_debug *debug) { }
 #endif /* CONFIG_HUGETLB_PAGE */
 
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
-static void __init pmd_thp_tests(unsigned long pfn, pgprot_t prot)
+static void __init pmd_thp_tests(struct vm_pgtable_debug *debug)
 {
 	pmd_t pmd;
 
@@ -934,7 +934,7 @@ static void __init pmd_thp_tests(unsigned long pfn, pgprot_t prot)
 	 * needs to return true. pmd_present() should be true whenever
 	 * pmd_trans_huge() returns true.
 	 */
-	pmd = pfn_pmd(pfn, prot);
+	pmd = pfn_pmd(debug->fixed_pmd_pfn, debug->page_prot);
 	WARN_ON(!pmd_trans_huge(pmd_mkhuge(pmd)));
 
 #ifndef __HAVE_ARCH_PMDP_INVALIDATE
@@ -944,7 +944,7 @@ static void __init pmd_thp_tests(unsigned long pfn, pgprot_t prot)
 }
 
 #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
-static void __init pud_thp_tests(unsigned long pfn, pgprot_t prot)
+static void __init pud_thp_tests(struct vm_pgtable_debug *debug)
 {
 	pud_t pud;
 
@@ -952,7 +952,7 @@ static void __init pud_thp_tests(unsigned long pfn, pgprot_t prot)
 		return;
 
 	pr_debug("Validating PUD based THP\n");
-	pud = pfn_pud(pfn, prot);
+	pud = pfn_pud(debug->fixed_pud_pfn, debug->page_prot);
 	WARN_ON(!pud_trans_huge(pud_mkhuge(pud)));
 
 	/*
@@ -964,11 +964,11 @@ static void __init pud_thp_tests(unsigned long pfn, pgprot_t prot)
 	 */
 }
 #else  /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
-static void __init pud_thp_tests(unsigned long pfn, pgprot_t prot) { }
+static void __init pud_thp_tests(struct vm_pgtable_debug *debug) { }
 #endif /* CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
 #else  /* !CONFIG_TRANSPARENT_HUGEPAGE */
-static void __init pmd_thp_tests(unsigned long pfn, pgprot_t prot) { }
-static void __init pud_thp_tests(unsigned long pfn, pgprot_t prot) { }
+static void __init pmd_thp_tests(struct vm_pgtable_debug *debug) { }
+static void __init pud_thp_tests(struct vm_pgtable_debug *debug) { }
 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
 
 static unsigned long __init get_random_vaddr(void)
@@ -1284,10 +1284,10 @@ static int __init debug_vm_pgtable(void)
 	pte_swap_tests(&debug);
 	pmd_swap_tests(&debug);
 
-	swap_migration_tests();
+	swap_migration_tests(&debug);
 
-	pmd_thp_tests(pmd_aligned, prot);
-	pud_thp_tests(pud_aligned, prot);
+	pmd_thp_tests(&debug);
+	pud_thp_tests(&debug);
 
 	/*
 	 * Page table modifying tests. They need to hold
-- 
2.23.0


  parent reply	other threads:[~2021-07-06  6:18 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-06  6:17 [PATCH 00/12] mm/debug_vm_pgtable: Enhancements Gavin Shan
2021-07-06  6:17 ` [PATCH 01/12] mm/debug_vm_pgtable: Introduce struct vm_pgtable_debug Gavin Shan
2021-07-14  6:24   ` Anshuman Khandual
2021-07-19  5:39     ` Gavin Shan
2021-07-20  7:02       ` Anshuman Khandual
2021-07-20 23:07         ` Gavin Shan
2021-07-21  4:20           ` Anshuman Khandual
2021-07-06  6:17 ` [PATCH 02/12] mm/debug_vm_pgtable: Use struct vm_pgtable_debug in basic tests Gavin Shan
2021-07-06  6:17 ` [PATCH 03/12] mm/debug_vm_pgtable: Use struct vm_pgtable_debug in leaf and savewrite tests Gavin Shan
2021-07-06  6:17 ` [PATCH 04/12] mm/debug_vm_pgtable: Use struct vm_pgtable_debug in protnone and devmap tests Gavin Shan
2021-07-06  6:17 ` [PATCH 05/12] mm/vm_debug_pgtable: Use struct vm_pgtable_debug in soft_dirty and swap tests Gavin Shan
2021-07-06  6:17 ` Gavin Shan [this message]
2021-07-06  6:17 ` [PATCH 07/12] mm/debug_vm_pgtable: Use struct vm_pgtable_debug in PTE modifying tests Gavin Shan
2021-07-06  6:17 ` [PATCH 08/12] mm/debug_vm_pgtable: Use struct vm_pgtable_debug in PMD " Gavin Shan
2021-07-06  6:17 ` [PATCH 09/12] mm/vm_debug_pgtable: Use struct vm_pgtable_debug in PUD " Gavin Shan
2021-07-06  6:17 ` [PATCH 10/12] mm/debug_vm_pgtable: Use struct vm_pgtable_debug in PGD and P4D " Gavin Shan
2021-07-06  6:17 ` [PATCH 11/12] mm/debug_vm_pgtable: Remove unused code Gavin Shan
2021-07-06  6:17 ` [PATCH 12/12] mm/debug_vm_pgtable: Fix corrupted page flag Gavin Shan
2021-07-12  4:14 ` [PATCH 00/12] mm/debug_vm_pgtable: Enhancements Anshuman Khandual
2021-07-13  1:20   ` Gavin Shan
2021-07-14  5:26     ` Anshuman Khandual
2021-07-15  5:17       ` Gavin Shan
2021-07-18  6:36         ` Anshuman Khandual

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