diff --git a/mm/debug-pagealloc.c b/mm/debug-pagealloc.c index 87dde3682f5e..f91d9b52e22e 100644 --- a/mm/debug-pagealloc.c +++ b/mm/debug-pagealloc.c @@ -54,7 +54,8 @@ static bool single_bit_flip(unsigned char a, unsigned char b) return error && !(error & (error - 1)); } -static void check_poison_mem(unsigned char *mem, size_t bytes) +static void check_poison_mem(struct page *page, + unsigned char *mem, size_t bytes) { static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 10); unsigned char *start; @@ -72,10 +73,11 @@ static void check_poison_mem(unsigned char *mem, size_t bytes) if (!__ratelimit(&ratelimit)) return; else if (start == end && single_bit_flip(*start, PAGE_POISON)) - printk(KERN_ERR "pagealloc: single bit error\n"); + printk(KERN_ERR "pagealloc: single bit error on page with phys start 0x%lx\n", + (unsigned long)page_to_phys(page)); else - printk(KERN_ERR "pagealloc: memory corruption\n"); - + printk(KERN_ERR "pagealloc: memory corruption on page with phys start 0x%lx\n", + (unsigned long)page_to_phys(page)); print_hex_dump(KERN_ERR, "", DUMP_PREFIX_ADDRESS, 16, 1, start, end - start + 1, 1); BUG_ON(PANIC_CORRUPTION); @@ -90,7 +92,7 @@ static void unpoison_page(struct page *page) return; addr = kmap_atomic(page); - check_poison_mem(addr, PAGE_SIZE); + check_poison_mem(page, addr, PAGE_SIZE); mark_addr_rdwrite(addr); clear_page_poison(page); kunmap_atomic(addr);