Re: mm: BUG in pgtable_pmd_page_dtor

[Andrey Ryabinin]

On 11/25/2016 11:42 AM, Vlastimil Babka wrote:

>  	pr_emerg("page:%p count:%d mapcount:%d mapping:%p index:%#lx",
>  		  page, page_ref_count(page), mapcount,
> @@ -59,6 +61,21 @@ void __dump_page(struct page *page, const char *reason)
>  
>  	pr_emerg("flags: %#lx(%pGp)\n", page->flags, &page->flags);
>  
> +	pr_alert("raw struct page data:");
> +	for (i = 0; i < sizeof(struct page) / sizeof(unsigned long); i++) {
> +		unsigned long *word_ptr;
> +
> +		word_ptr = ((unsigned long *) page) + i;
> +
> +		if ((i % words_per_line) == 0) {
> +			pr_cont("\n");
> +			pr_alert(" %016lx", *word_ptr);
> +		} else {
> +			pr_cont(" %016lx", *word_ptr);
> +		}
> +	}
> +	pr_cont("\n");
> +

Single call to print_hex_dump() could replace this loop.

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