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mm/debug_vm_pgtable: use struct pgtable_debug_args in migration and thp tests

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This uses struct pgtable_debug_args 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.

Link: https://lkml.kernel.org/r/20210809092631.1888748-7-gshan@redhat.com
Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Tested-by: Christophe Leroy <christophe.leroy@csgroup.eu>	[powerpc 8xx]
Tested-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com>	[s390]
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chunyu Hu <chuhu@redhat.com>
Cc: Qian Cai <cai@lca.pw>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Gavin Shan 2021-09-02 14:52:35 -07:00 committed by Linus Torvalds
parent 5f447e8067
commit 4878a88882
1 changed files with 17 additions and 19 deletions
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36
mm/debug_vm_pgtable.c
View file

@ -845,7 +845,7 @@ static void __init pmd_swap_tests(struct pgtable_debug_args *args)
static void __init pmd_swap_tests(struct pgtable_debug_args *args) { }
#endif /* CONFIG_ARCH_ENABLE_THP_MIGRATION */
static void __init swap_migration_tests(void)
static void __init swap_migration_tests(struct pgtable_debug_args *args)
{
struct page *page;
swp_entry_t swp;
@ -853,19 +853,18 @@ static void __init swap_migration_tests(void)
if (!IS_ENABLED(CONFIG_MIGRATION))
return;
pr_debug("Validating swap migration\n");
/*
* swap_migration_tests() requires a dedicated page as it needs to
* be locked before creating a migration entry from it. Locking the
* page that actually maps kernel text ('start_kernel') can be real
* problematic. Lets allocate a dedicated page explicitly for this
* purpose that will be freed subsequently.
* problematic. Lets use the allocated page explicitly for this
* purpose.
*/
page = alloc_page(GFP_KERNEL);
if (!page) {
pr_err("page allocation failed\n");
page = (args->pte_pfn != ULONG_MAX) ? pfn_to_page(args->pte_pfn) : NULL;
if (!page)
return;
}
pr_debug("Validating swap migration\n");
/*
* make_migration_entry() expects given page to be
@ -884,7 +883,6 @@ 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
@ -916,7 +914,7 @@ static void __init hugetlb_basic_tests(struct pgtable_debug_args *args) { }
#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 pgtable_debug_args *args)
{
pmd_t pmd;
@ -935,7 +933,7 @@ 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(args->fixed_pmd_pfn, args->page_prot);
WARN_ON(!pmd_trans_huge(pmd_mkhuge(pmd)));
#ifndef __HAVE_ARCH_PMDP_INVALIDATE
@ -945,7 +943,7 @@ 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 pgtable_debug_args *args)
{
pud_t pud;
@ -953,7 +951,7 @@ 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(args->fixed_pud_pfn, args->page_prot);
WARN_ON(!pud_trans_huge(pud_mkhuge(pud)));
/*
@ -965,11 +963,11 @@ 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 pgtable_debug_args *args) { }
#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 pgtable_debug_args *args) { }
static void __init pud_thp_tests(struct pgtable_debug_args *args) { }
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
static unsigned long __init get_random_vaddr(void)
@ -1335,10 +1333,10 @@ static int __init debug_vm_pgtable(void)
pte_swap_tests(&args);
pmd_swap_tests(&args);
swap_migration_tests();
swap_migration_tests(&args);
pmd_thp_tests(pmd_aligned, prot);
pud_thp_tests(pud_aligned, prot);
pmd_thp_tests(&args);
pud_thp_tests(&args);
hugetlb_basic_tests(&args);