linux/mm/debug.c

// SPDX-License-Identifier: GPL-2.0
/*
 * mm/debug.c
 *
 * mm/ specific debug routines.
 *
 */

#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/trace_events.h>
#include <linux/memcontrol.h>
#include <trace/events/mmflags.h>
#include <linux/migrate.h>
#include <linux/page_owner.h>
#include <linux/ctype.h>

#include "internal.h"
#include <trace/events/migrate.h>

/*
 * Define EM() and EMe() so that MIGRATE_REASON from trace/events/migrate.h can
 * be used to populate migrate_reason_names[].
 */
#undef EM
#undef EMe
#define EM(a, b) …
#define EMe(a, b) …

const char *migrate_reason_names[MR_TYPES] = …;

const struct trace_print_flags pageflag_names[] = …;

const struct trace_print_flags pagetype_names[] = …;

const struct trace_print_flags gfpflag_names[] = …;

const struct trace_print_flags vmaflag_names[] = …;

static void __dump_folio(struct folio *folio, struct page *page,
		unsigned long pfn, unsigned long idx)
{ … }

static void __dump_page(const struct page *page)
{ … }

void dump_page(const struct page *page, const char *reason)
{ … }
EXPORT_SYMBOL(…);

#ifdef CONFIG_DEBUG_VM

void dump_vma(const struct vm_area_struct *vma)
{ … }
EXPORT_SYMBOL(…);

void dump_mm(const struct mm_struct *mm)
{ … }
EXPORT_SYMBOL(…);

static bool page_init_poisoning __read_mostly = …;

static int __init setup_vm_debug(char *str)
{ … }
__setup(…);

void page_init_poison(struct page *page, size_t size)
{ … }

void vma_iter_dump_tree(const struct vma_iterator *vmi)
{ … }

#endif		/* CONFIG_DEBUG_VM */