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mm/debug.c
4.21 KB
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// SPDX-License-Identifier: GPL-2.0 |
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/* * mm/debug.c * * mm/ specific debug routines. * */ |
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#include <linux/kernel.h> #include <linux/mm.h> |
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#include <linux/trace_events.h> |
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#include <linux/memcontrol.h> |
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#include <trace/events/mmflags.h> |
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#include <linux/migrate.h> |
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#include <linux/page_owner.h> |
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#include "internal.h" |
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char *migrate_reason_names[MR_TYPES] = { "compaction", "memory_failure", "memory_hotplug", "syscall_or_cpuset", "mempolicy_mbind", "numa_misplaced", "cma", }; |
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const struct trace_print_flags pageflag_names[] = { __def_pageflag_names, {0, NULL} }; const struct trace_print_flags gfpflag_names[] = { __def_gfpflag_names, {0, NULL} |
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}; |
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const struct trace_print_flags vmaflag_names[] = { __def_vmaflag_names, {0, NULL} |
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}; |
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void __dump_page(struct page *page, const char *reason) |
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{ |
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/* * Avoid VM_BUG_ON() in page_mapcount(). * page->_mapcount space in struct page is used by sl[aou]b pages to * encode own info. */ |
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int mapcount = PageSlab(page) ? 0 : page_mapcount(page); |
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pr_emerg("page:%p count:%d mapcount:%d mapping:%p index:%#lx", |
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page, page_ref_count(page), mapcount, page->mapping, page_to_pgoff(page)); |
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if (PageCompound(page)) pr_cont(" compound_mapcount: %d", compound_mapcount(page)); pr_cont(" "); |
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BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS + 1); |
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pr_emerg("flags: %#lx(%pGp) ", page->flags, &page->flags); |
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print_hex_dump(KERN_ALERT, "raw: ", DUMP_PREFIX_NONE, 32, sizeof(unsigned long), page, sizeof(struct page), false); |
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if (reason) pr_alert("page dumped because: %s ", reason); |
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#ifdef CONFIG_MEMCG if (page->mem_cgroup) pr_alert("page->mem_cgroup:%p ", page->mem_cgroup); #endif |
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} void dump_page(struct page *page, const char *reason) { |
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__dump_page(page, reason); |
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dump_page_owner(page); |
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} EXPORT_SYMBOL(dump_page); #ifdef CONFIG_DEBUG_VM |
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void dump_vma(const struct vm_area_struct *vma) { |
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pr_emerg("vma %p start %p end %p " |
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"next %p prev %p mm %p " "prot %lx anon_vma %p vm_ops %p " |
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"pgoff %lx file %p private_data %p " "flags: %#lx(%pGv) ", |
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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, |
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vma->vm_file, vma->vm_private_data, vma->vm_flags, &vma->vm_flags); |
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} EXPORT_SYMBOL(dump_vma); |
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void dump_mm(const struct mm_struct *mm) { |
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pr_emerg("mm %p mmap %p seqnum %llu task_size %lu " |
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#ifdef CONFIG_MMU "get_unmapped_area %p " #endif "mmap_base %lu mmap_legacy_base %lu highest_vm_end %lu " |
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"pgd %p mm_users %d mm_count %d nr_ptes %lu nr_pmds %lu map_count %d " |
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"hiwater_rss %lx hiwater_vm %lx total_vm %lx locked_vm %lx " |
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"pinned_vm %lx data_vm %lx exec_vm %lx stack_vm %lx " |
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"start_code %lx end_code %lx start_data %lx end_data %lx " "start_brk %lx brk %lx start_stack %lx " "arg_start %lx arg_end %lx env_start %lx env_end %lx " "binfmt %p flags %lx core_state %p " #ifdef CONFIG_AIO "ioctx_table %p " #endif #ifdef CONFIG_MEMCG "owner %p " #endif "exe_file %p " #ifdef CONFIG_MMU_NOTIFIER "mmu_notifier_mm %p " #endif #ifdef CONFIG_NUMA_BALANCING "numa_next_scan %lu numa_scan_offset %lu numa_scan_seq %d " #endif |
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"tlb_flush_pending %d " |
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"def_flags: %#lx(%pGv) ", |
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mm, mm->mmap, (long long) mm->vmacache_seqnum, mm->task_size, |
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#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), atomic_long_read((atomic_long_t *)&mm->nr_ptes), |
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mm_nr_pmds((struct mm_struct *)mm), |
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mm->map_count, mm->hiwater_rss, mm->hiwater_vm, mm->total_vm, mm->locked_vm, |
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mm->pinned_vm, mm->data_vm, mm->exec_vm, mm->stack_vm, |
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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 |
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atomic_read(&mm->tlb_flush_pending), |
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mm->def_flags, &mm->def_flags ); |
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} |
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#endif /* CONFIG_DEBUG_VM */ |