From: Andrew Morton <akpm@osdl.org>
To: Christopher Swingley <cswingle@iarc.uaf.edu>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.0-test4: Unable to handle kernel NULL pointer dereference
Date: Thu, 28 Aug 2003 13:10:19 -0700 [thread overview]
Message-ID: <20030828131019.69a9f3b9.akpm@osdl.org> (raw)
In-Reply-To: <20030828153448.GA1001@iarc.uaf.edu>
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,
_
next prev parent reply other threads:[~2003-08-28 20:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-28 15:34 Christopher Swingley
2003-08-28 20:10 ` Andrew Morton [this message]
2003-08-29 2:06 ` Bill Davidsen
2003-08-29 2:32 ` Andrew Morton
2003-08-29 2:33 ` Randy.Dunlap
2003-08-29 2:40 ` Andrew Morton
2003-08-29 10:06 ` Alan Cox
2003-08-29 14:17 ` Hollis Blanchard
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