コード例 #1
0
ファイル: debug.c プロジェクト: mousecage/linux
void __dump_page(struct page *page, const char *reason)
{
	struct address_space *mapping = page_mapping(page);
	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_warn("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_warn("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");
	if (PageAnon(page))
		pr_warn("anon ");
	else if (PageKsm(page))
		pr_warn("ksm ");
	else if (mapping) {
		pr_warn("%ps ", mapping->a_ops);
		if (mapping->host->i_dentry.first) {
			struct dentry *dentry;
			dentry = container_of(mapping->host->i_dentry.first, struct dentry, d_u.d_alias);
			pr_warn("name:\"%pd\" ", dentry);
		}
	}
	BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS + 1);

	pr_warn("flags: %#lx(%pGp)\n", page->flags, &page->flags);

hex_only:
	print_hex_dump(KERN_WARNING, "raw: ", DUMP_PREFIX_NONE, 32,
			sizeof(unsigned long), page,
			sizeof(struct page), false);

	if (reason)
		pr_warn("page dumped because: %s\n", reason);

#ifdef CONFIG_MEMCG
	if (!page_poisoned && page->mem_cgroup)
		pr_warn("page->mem_cgroup:%px\n", page->mem_cgroup);
#endif
}
コード例 #2
0
ファイル: debug.c プロジェクト: Lyude/linux
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
}