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From: Ben Hutchings <ben@decadent.org.uk>
Date: Mon, 5 Dec 2011 04:00:58 +0000
Subject: x86: memtest: WARN if bad RAM found
Bug-Debian: https://bugs.debian.org/613321
Forwarded: http://thread.gmane.org/gmane.linux.kernel/1286471
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 <ben@decadent.org.uk>
---
mm/memtest.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
Index: linux/mm/memtest.c
===================================================================
--- linux.orig/mm/memtest.c
+++ linux/mm/memtest.c
@@ -27,6 +27,10 @@ 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);
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