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()
82 		int pincount = 0;  in __dump_folio()
85 			pincount = atomic_read(&folio->_pincount);  in __dump_folio()
96 	if (folio->memcg_data)  in __dump_folio()
97 		pr_warn("memcg:%lx\n", folio->memcg_data);  in __dump_folio()
113 	pr_warn("%sflags: %pGp%s\n", type, &folio->flags,  in __dump_folio()
115 	if (page_has_type(&folio->page))  in __dump_folio()
116 		pr_warn("page_type: %x(%s)\n", folio->page.page_type >> 24,  in __dump_folio()
117 				page_type_name(folio->page.page_type));  in __dump_folio()
140 	if ((head & 1) == 0) {  in __dump_page()
142 		idx = 0;  in __dump_page()
147 		foliop = (struct folio *)(head - 1);  in __dump_page()
155 			memcpy(&folio.__page_2, &foliop->__page_2,  in __dump_page()
161 		if (loops-- > 0)  in __dump_page()
166 		idx = 0;  in __dump_page()
189 	pr_emerg("vma %px start %px end %px mm %px\n"  in dump_vma()
196 		vma, (void *)vma->vm_start, (void *)vma->vm_end, vma->vm_mm,  in dump_vma()
197 		(unsigned long)pgprot_val(vma->vm_page_prot),  in dump_vma()
198 		vma->anon_vma, vma->vm_ops, vma->vm_pgoff,  in dump_vma()
199 		vma->vm_file, vma->vm_private_data,  in dump_vma()
201 		refcount_read(&vma->vm_refcnt),  in dump_vma()
203 		vma->vm_flags, &vma->vm_flags);  in dump_vma()
207 void dump_mm(const struct mm_struct *mm)  in dump_mm()  argument
209 	pr_emerg("mm %px task_size %lu\n"  in dump_mm()
234 		mm, mm->task_size,  in dump_mm()
235 		mm->mmap_base, mm->mmap_legacy_base,  in dump_mm()
236 		mm->pgd, atomic_read(&mm->mm_users),  in dump_mm()
237 		atomic_read(&mm->mm_count),  in dump_mm()
238 		mm_pgtables_bytes(mm),  in dump_mm()
239 		mm->map_count,  in dump_mm()
240 		mm->hiwater_rss, mm->hiwater_vm, mm->total_vm, mm->locked_vm,  in dump_mm()
241 		(u64)atomic64_read(&mm->pinned_vm),  in dump_mm()
242 		mm->data_vm, mm->exec_vm, mm->stack_vm,  in dump_mm()
243 		mm->start_code, mm->end_code, mm->start_data, mm->end_data,  in dump_mm()
244 		mm->start_brk, mm->brk, mm->start_stack,  in dump_mm()
245 		mm->arg_start, mm->arg_end, mm->env_start, mm->env_end,  in dump_mm()
246 		mm->binfmt, mm->flags,  in dump_mm()
248 		mm->ioctx_table,  in dump_mm()
251 		mm->owner,  in dump_mm()
253 		mm->exe_file,  in dump_mm()
255 		mm->notifier_subscriptions,  in dump_mm()
258 		mm->numa_next_scan, mm->numa_scan_offset, mm->numa_scan_seq,  in dump_mm()
260 		atomic_read(&mm->tlb_flush_pending),  in dump_mm()
261 		mm->def_flags, &mm->def_flags  in dump_mm()
276 	pr_warn("vmg %px state: mm %px pgoff %lx\n"  in dump_vmg()
287 		vmg, vmg->mm, vmg->pgoff,  in dump_vmg()
288 		vmg->vmi, vmg->vmi ? vma_iter_addr(vmg->vmi) : 0,  in dump_vmg()
289 		vmg->vmi ? vma_iter_end(vmg->vmi) : 0,  in dump_vmg()
290 		vmg->prev, vmg->middle, vmg->next, vmg->target,  in dump_vmg()
291 		vmg->start, vmg->end, vmg->flags,  in dump_vmg()
292 		vmg->file, vmg->anon_vma, vmg->policy,  in dump_vmg()
294 		vmg->uffd_ctx.ctx,  in dump_vmg()
296 		(void *)0,  in dump_vmg()
298 		vmg->anon_name,  in dump_vmg()
299 		(int)vmg->state,  in dump_vmg()
300 		vmg->just_expand,  in dump_vmg()
301 		vmg->__adjust_middle_start, vmg->__adjust_next_start,  in dump_vmg()
302 		vmg->__remove_middle, vmg->__remove_next);  in dump_vmg()
304 	if (vmg->mm) {  in dump_vmg()
305 		pr_warn("vmg %px mm:\n", vmg);  in dump_vmg()
306 		dump_mm(vmg->mm);  in dump_vmg()
308 		pr_warn("vmg %px mm: (NULL)\n", vmg);  in dump_vmg()
311 	if (vmg->prev) {  in dump_vmg()
313 		dump_vma(vmg->prev);  in dump_vmg()
318 	if (vmg->middle) {  in dump_vmg()
320 		dump_vma(vmg->middle);  in dump_vmg()
325 	if (vmg->next) {  in dump_vmg()
327 		dump_vma(vmg->next);  in dump_vmg()
333 	if (vmg->vmi) {  in dump_vmg()
335 		vma_iter_dump_tree(vmg->vmi);  in dump_vmg()
357 	if (*str == '-')  in setup_vm_debug()
391 	mas_dump(&vmi->mas);  in vma_iter_dump_tree()
392 	mt_dump(vmi->mas.tree, mt_dump_hex);  in vma_iter_dump_tree()