Ingo Molnar <[email protected]> wrote:
>
> the crashes below happen when PAGEALLOC is enabled. It's this
> instruction:
>
> movb OLDSS(%esp), %ah
>
> OLDSS is 0x38, esp is f4f83fc8, OLDSS(%esp) is thus f4f84000, which
> correctly creates the PAGEALLOC pagefault. esp is off by 4 bytes?
>
> it could be the ESP-16-bit-corruption patch causing this,
Do you have nmis enabled?
From: Akinobu Mita <[email protected]>
With nmi_watchdog=1, I got random Oopses (Unable to handle kernel paging
request, not by the NMI oopser) from many processes. It is not happend
with -rc1.
The following change fixes this problem.
Signed-off-by: Andrew Morton <[email protected]>
---
25-akpm/arch/i386/kernel/entry.S | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
diff -puN arch/i386/kernel/entry.S~nmi_stack_correct-fix arch/i386/kernel/entry.S
--- 25/arch/i386/kernel/entry.S~nmi_stack_correct-fix 2005-04-05 00:02:48.000000000 -0700
+++ 25-akpm/arch/i386/kernel/entry.S 2005-04-05 00:02:48.000000000 -0700
@@ -550,7 +550,7 @@ nmi_stack_correct:
xorl %edx,%edx # zero error code
movl %esp,%eax # pt_regs pointer
call do_nmi
- jmp restore_all
+ jmp restore_nocheck
nmi_stack_fixup:
FIX_STACK(12,nmi_stack_correct, 1)
_
-
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