Re: KMEMCHECK: linux-next: kernel BUG atarch/x86/mm/kmemcheck/kmemcheck.c:297!

[Vegard Nossum]

2009/3/11 Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>:
> Hello.
>
> I encountered this.
>
> [    0.004000] ------------[ cut here ]------------
> [    0.004000] kernel BUG at arch/x86/mm/kmemcheck/kmemcheck.c:297!

Hi, thanks for this report!

I have a feeling that the following patch might fix it. Please try it out
only if you have the time. I will also try to reproduce it when I have the
time myself.


Vegard


diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 6d63e3d..86f7398 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -146,7 +146,7 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
 	if (!after_bootmem)
 		init_gbpages();
 
-#ifdef CONFIG_DEBUG_PAGEALLOC
+#if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_KMEMCHECK)
 	/*
 	 * For CONFIG_DEBUG_PAGEALLOC, identity mapping will use small pages.
 	 * This will simplify cpa(), which otherwise needs to support splitting
--
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