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SubjectRe: 2.6.0-test4: Unable to handle kernel NULL pointer dereference
Christopher Swingley <cswingle@iarc.uaf.edu> wrote:
>
> kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000000
> ...
> kernel: EIP is at find_inode_fast+0x1a/0x60
> ...
> model name : AMD Athlon(tm) XP 1800+
> ...

You've been bitten by the athlon-prefetch(0)-goes-oops problem.

Nobody seems to be working this, so I'll be sending the below in to Linus.

--- 25/include/asm-i386/processor.h~disable-athlon-prefetch 2003-08-23 13:48:16.000000000 -0700
+++ 25-akpm/include/asm-i386/processor.h 2003-08-23 13:48:16.000000000 -0700
@@ -578,6 +578,8 @@ static inline void rep_nop(void)
#define ARCH_HAS_PREFETCH
extern inline void prefetch(const void *x)
{
+ if (cpu_data[0].x86_vendor == X86_VENDOR_AMD)
+ return;
alternative_input(ASM_NOP4,
"prefetchnta (%1)",
X86_FEATURE_XMM,
_

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