1 // SPDX-License-Identifier: GPL-2.0
3  * mm/debug.c
5  * mm/ specific debug routines.
10 #include <linux/mm.h>
36 	{0, NULL}
41 	{0, NULL}
46 	{0, NULL}
49 #define DEF_PAGETYPE_NAME(_name) [PGTY_##_name - 0xf0] =  __stringify(_name)
63 	unsigned i = (page_type >> 24) - 0xf0;  in page_type_name()
74 	int mapcount = atomic_read(&page->_mapcount);  in __dump_folio()
77 	mapcount = page_mapcount_is_type(mapcount) ? 0 : mapcount + 1;  in __dump_folio()
80 			folio->index + idx, pfn);  in __dump_folio()
87 				atomic_read(&folio->_pincount));  in __dump_folio()
91 	if (folio->memcg_data)  in __dump_folio()
92 		pr_warn("memcg:%lx\n", folio->memcg_data);  in __dump_folio()
108 	pr_warn("%sflags: %pGp%s\n", type, &folio->flags,  in __dump_folio()
110 	if (page_has_type(&folio->page))  in __dump_folio()
111 		pr_warn("page_type: %x(%s)\n", folio->page.page_type >> 24,  in __dump_folio()
112 				page_type_name(folio->page.page_type));  in __dump_folio()
135 	if ((head & 1) == 0) {  in __dump_page()
137 		idx = 0;  in __dump_page()
142 		foliop = (struct folio *)(head - 1);  in __dump_page()
153 		if (loops-- > 0)  in __dump_page()
158 		idx = 0;  in __dump_page()
181 	pr_emerg("vma %px start %px end %px mm %px\n"  in dump_vma()
185 		vma, (void *)vma->vm_start, (void *)vma->vm_end, vma->vm_mm,  in dump_vma()
186 		(unsigned long)pgprot_val(vma->vm_page_prot),  in dump_vma()
187 		vma->anon_vma, vma->vm_ops, vma->vm_pgoff,  in dump_vma()
188 		vma->vm_file, vma->vm_private_data,  in dump_vma()
189 		vma->vm_flags, &vma->vm_flags);  in dump_vma()
193 void dump_mm(const struct mm_struct *mm)  in dump_mm()  argument
195 	pr_emerg("mm %px task_size %lu\n"  in dump_mm()
220 		mm, mm->task_size,  in dump_mm()
221 		mm->mmap_base, mm->mmap_legacy_base,  in dump_mm()
222 		mm->pgd, atomic_read(&mm->mm_users),  in dump_mm()
223 		atomic_read(&mm->mm_count),  in dump_mm()
224 		mm_pgtables_bytes(mm),  in dump_mm()
225 		mm->map_count,  in dump_mm()
226 		mm->hiwater_rss, mm->hiwater_vm, mm->total_vm, mm->locked_vm,  in dump_mm()
227 		(u64)atomic64_read(&mm->pinned_vm),  in dump_mm()
228 		mm->data_vm, mm->exec_vm, mm->stack_vm,  in dump_mm()
229 		mm->start_code, mm->end_code, mm->start_data, mm->end_data,  in dump_mm()
230 		mm->start_brk, mm->brk, mm->start_stack,  in dump_mm()
231 		mm->arg_start, mm->arg_end, mm->env_start, mm->env_end,  in dump_mm()
232 		mm->binfmt, mm->flags,  in dump_mm()
234 		mm->ioctx_table,  in dump_mm()
237 		mm->owner,  in dump_mm()
239 		mm->exe_file,  in dump_mm()
241 		mm->notifier_subscriptions,  in dump_mm()
244 		mm->numa_next_scan, mm->numa_scan_offset, mm->numa_scan_seq,  in dump_mm()
246 		atomic_read(&mm->tlb_flush_pending),  in dump_mm()
247 		mm->def_flags, &mm->def_flags  in dump_mm()
262 	pr_warn("vmg %px state: mm %px pgoff %lx\n"  in dump_vmg()
270 		vmg, vmg->mm, vmg->pgoff,  in dump_vmg()
271 		vmg->vmi, vmg->vmi ? vma_iter_addr(vmg->vmi) : 0,  in dump_vmg()
272 		vmg->vmi ? vma_iter_end(vmg->vmi) : 0,  in dump_vmg()
273 		vmg->prev, vmg->next, vmg->vma,  in dump_vmg()
274 		vmg->start, vmg->end, vmg->flags,  in dump_vmg()
275 		vmg->file, vmg->anon_vma, vmg->policy,  in dump_vmg()
277 		vmg->uffd_ctx.ctx,  in dump_vmg()
279 		(void *)0,  in dump_vmg()
281 		vmg->anon_name,  in dump_vmg()
282 		(int)vmg->merge_flags, (int)vmg->state);  in dump_vmg()
284 	if (vmg->mm) {  in dump_vmg()
285 		pr_warn("vmg %px mm:\n", vmg);  in dump_vmg()
286 		dump_mm(vmg->mm);  in dump_vmg()
288 		pr_warn("vmg %px mm: (NULL)\n", vmg);  in dump_vmg()
291 	if (vmg->vma) {  in dump_vmg()
293 		dump_vma(vmg->vma);  in dump_vmg()
298 	if (vmg->prev) {  in dump_vmg()
300 		dump_vma(vmg->prev);  in dump_vmg()
305 	if (vmg->next) {  in dump_vmg()
307 		dump_vma(vmg->next);  in dump_vmg()
313 	if (vmg->vmi) {  in dump_vmg()
315 		vma_iter_dump_tree(vmg->vmi);  in dump_vmg()
337 	if (*str == '-')  in setup_vm_debug()
371 	mas_dump(&vmi->mas);  in vma_iter_dump_tree()
372 	mt_dump(vmi->mas.tree, mt_dump_hex);  in vma_iter_dump_tree()