From c468ea9f6b697f2c9935524dc013a3de8a9c81bb Mon Sep 17 00:00:00 2001 From: Ben Hutchings Date: Mon, 5 Dec 2011 04:00:58 +0000 Subject: [PATCH] x86: memtest: WARN if bad RAM found Bug-Debian: https://bugs.debian.org/613321 Forwarded: https://lore.kernel.org/all/20120402150522.GA4980@burratino/ Since this is not a particularly thorough test, if we find any bad bits of RAM then there is a fair chance that there are other bad bits we fail to detect. Signed-off-by: Ben Hutchings Gbp-Pq: Topic features/x86 Gbp-Pq: Name x86-memtest-WARN-if-bad-RAM-found.patch --- mm/memtest.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/mm/memtest.c b/mm/memtest.c index c2c609c3911..bf422881390 100644 --- a/mm/memtest.c +++ b/mm/memtest.c @@ -31,6 +31,10 @@ static u64 patterns[] __initdata = { static void __init reserve_bad_mem(u64 pattern, phys_addr_t start_bad, phys_addr_t end_bad) { +#ifdef CONFIG_X86 + WARN_ONCE(1, "Bad RAM detected. Use memtest86+ to perform a thorough test\n" + "and the memmap= parameter to reserve the bad areas."); +#endif pr_info(" %016llx bad mem addr %pa - %pa reserved\n", cpu_to_be64(pattern), &start_bad, &end_bad); memblock_reserve(start_bad, end_bad - start_bad); -- 2.30.2