179 lines
4.5 KiB
C
179 lines
4.5 KiB
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 "internal.h"
|
|
|
|
char *migrate_reason_names[MR_TYPES] = {
|
|
"compaction",
|
|
"memory_failure",
|
|
"memory_hotplug",
|
|
"syscall_or_cpuset",
|
|
"mempolicy_mbind",
|
|
"numa_misplaced",
|
|
"cma",
|
|
};
|
|
|
|
const struct trace_print_flags pageflag_names[] = {
|
|
__def_pageflag_names,
|
|
{0, NULL}
|
|
};
|
|
|
|
const struct trace_print_flags gfpflag_names[] = {
|
|
__def_gfpflag_names,
|
|
{0, NULL}
|
|
};
|
|
|
|
const struct trace_print_flags vmaflag_names[] = {
|
|
__def_vmaflag_names,
|
|
{0, NULL}
|
|
};
|
|
|
|
void __dump_page(struct page *page, const char *reason)
|
|
{
|
|
bool page_poisoned = PagePoisoned(page);
|
|
int mapcount;
|
|
|
|
/*
|
|
* If struct page is poisoned don't access Page*() functions as that
|
|
* leads to recursive loop. Page*() check for poisoned pages, and calls
|
|
* dump_page() when detected.
|
|
*/
|
|
if (page_poisoned) {
|
|
pr_emerg("page:%px is uninitialized and poisoned", page);
|
|
goto hex_only;
|
|
}
|
|
|
|
/*
|
|
* Avoid VM_BUG_ON() in page_mapcount().
|
|
* page->_mapcount space in struct page is used by sl[aou]b pages to
|
|
* encode own info.
|
|
*/
|
|
mapcount = PageSlab(page) ? 0 : page_mapcount(page);
|
|
|
|
pr_emerg("page:%px count:%d mapcount:%d mapping:%px index:%#lx",
|
|
page, page_ref_count(page), mapcount,
|
|
page->mapping, page_to_pgoff(page));
|
|
if (PageCompound(page))
|
|
pr_cont(" compound_mapcount: %d", compound_mapcount(page));
|
|
pr_cont("\n");
|
|
BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS + 1);
|
|
|
|
pr_emerg("flags: %#lx(%pGp)\n", page->flags, &page->flags);
|
|
|
|
hex_only:
|
|
print_hex_dump(KERN_ALERT, "raw: ", DUMP_PREFIX_NONE, 32,
|
|
sizeof(unsigned long), page,
|
|
sizeof(struct page), false);
|
|
|
|
if (reason)
|
|
pr_alert("page dumped because: %s\n", reason);
|
|
|
|
#ifdef CONFIG_MEMCG
|
|
if (!page_poisoned && page->mem_cgroup)
|
|
pr_alert("page->mem_cgroup:%px\n", page->mem_cgroup);
|
|
#endif
|
|
}
|
|
|
|
void dump_page(struct page *page, const char *reason)
|
|
{
|
|
__dump_page(page, reason);
|
|
dump_page_owner(page);
|
|
}
|
|
EXPORT_SYMBOL(dump_page);
|
|
|
|
#ifdef CONFIG_DEBUG_VM
|
|
|
|
void dump_vma(const struct vm_area_struct *vma)
|
|
{
|
|
pr_emerg("vma %px start %px end %px\n"
|
|
"next %px prev %px mm %px\n"
|
|
"prot %lx anon_vma %px vm_ops %px\n"
|
|
"pgoff %lx file %px private_data %px\n"
|
|
"flags: %#lx(%pGv)\n",
|
|
vma, (void *)vma->vm_start, (void *)vma->vm_end, vma->vm_next,
|
|
vma->vm_prev, vma->vm_mm,
|
|
(unsigned long)pgprot_val(vma->vm_page_prot),
|
|
vma->anon_vma, vma->vm_ops, vma->vm_pgoff,
|
|
vma->vm_file, vma->vm_private_data,
|
|
vma->vm_flags, &vma->vm_flags);
|
|
}
|
|
EXPORT_SYMBOL(dump_vma);
|
|
|
|
void dump_mm(const struct mm_struct *mm)
|
|
{
|
|
pr_emerg("mm %px mmap %px seqnum %llu task_size %lu\n"
|
|
#ifdef CONFIG_MMU
|
|
"get_unmapped_area %px\n"
|
|
#endif
|
|
"mmap_base %lu mmap_legacy_base %lu highest_vm_end %lu\n"
|
|
"pgd %px mm_users %d mm_count %d pgtables_bytes %lu map_count %d\n"
|
|
"hiwater_rss %lx hiwater_vm %lx total_vm %lx locked_vm %lx\n"
|
|
"pinned_vm %lx data_vm %lx exec_vm %lx stack_vm %lx\n"
|
|
"start_code %lx end_code %lx start_data %lx end_data %lx\n"
|
|
"start_brk %lx brk %lx start_stack %lx\n"
|
|
"arg_start %lx arg_end %lx env_start %lx env_end %lx\n"
|
|
"binfmt %px flags %lx core_state %px\n"
|
|
#ifdef CONFIG_AIO
|
|
"ioctx_table %px\n"
|
|
#endif
|
|
#ifdef CONFIG_MEMCG
|
|
"owner %px "
|
|
#endif
|
|
"exe_file %px\n"
|
|
#ifdef CONFIG_MMU_NOTIFIER
|
|
"mmu_notifier_mm %px\n"
|
|
#endif
|
|
#ifdef CONFIG_NUMA_BALANCING
|
|
"numa_next_scan %lu numa_scan_offset %lu numa_scan_seq %d\n"
|
|
#endif
|
|
"tlb_flush_pending %d\n"
|
|
"def_flags: %#lx(%pGv)\n",
|
|
|
|
mm, mm->mmap, (long long) mm->vmacache_seqnum, mm->task_size,
|
|
#ifdef CONFIG_MMU
|
|
mm->get_unmapped_area,
|
|
#endif
|
|
mm->mmap_base, mm->mmap_legacy_base, mm->highest_vm_end,
|
|
mm->pgd, atomic_read(&mm->mm_users),
|
|
atomic_read(&mm->mm_count),
|
|
mm_pgtables_bytes(mm),
|
|
mm->map_count,
|
|
mm->hiwater_rss, mm->hiwater_vm, mm->total_vm, mm->locked_vm,
|
|
mm->pinned_vm, mm->data_vm, mm->exec_vm, mm->stack_vm,
|
|
mm->start_code, mm->end_code, mm->start_data, mm->end_data,
|
|
mm->start_brk, mm->brk, mm->start_stack,
|
|
mm->arg_start, mm->arg_end, mm->env_start, mm->env_end,
|
|
mm->binfmt, mm->flags, mm->core_state,
|
|
#ifdef CONFIG_AIO
|
|
mm->ioctx_table,
|
|
#endif
|
|
#ifdef CONFIG_MEMCG
|
|
mm->owner,
|
|
#endif
|
|
mm->exe_file,
|
|
#ifdef CONFIG_MMU_NOTIFIER
|
|
mm->mmu_notifier_mm,
|
|
#endif
|
|
#ifdef CONFIG_NUMA_BALANCING
|
|
mm->numa_next_scan, mm->numa_scan_offset, mm->numa_scan_seq,
|
|
#endif
|
|
atomic_read(&mm->tlb_flush_pending),
|
|
mm->def_flags, &mm->def_flags
|
|
);
|
|
}
|
|
|
|
#endif /* CONFIG_DEBUG_VM */
|