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Date: Mon, 12 May 2003 05:40:55 -0700
From: "Martin J. Bligh" <mbligh@aracnet.com>
To: William Lee Irwin III <wli@holomorphy.com>
cc: linux-kernel <linux-kernel@vger.kernel.org>,
       lse-tech <lse-tech@lists.sourceforge.net>, haveblue@us.ibm.com
Subject: Re: 2.5.69-mjb1
Message-ID: <21850000.1052743254@[10.10.2.4]>
In-Reply-To: <20030512132939.GF19053@holomorphy.com>
References: <9380000.1052624649@[10.10.2.4]> <20030512132939.GF19053@holomorphy.com>
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--On Monday, May 12, 2003 06:29:39 -0700 William Lee Irwin III <wli@holomorphy.com> wrote:

> On Sat, May 10, 2003 at 08:44:09PM -0700, Martin J. Bligh wrote:
>> thread_info_cleanup (4K stacks pt 1)		Dave Hansen / Ben LaHaise
>> 	Prep work to reduce kernel stacks to 4K
>> interrupt_stacks    (4K stacks pt 2)		Dave Hansen / Ben LaHaise
>> 	Create a per-cpu interrupt stack.
>> stack_usage_check   (4K stacks pt 3)		Dave Hansen / Ben LaHaise
>> 	Check for kernel stack overflows.
>> 4k_stack            (4K stacks pt 4)		Dave Hansen
>> 	Config option to reduce kernel stacks to 4K
> 
> 
> diff -urpN linux-2.5.69/include/asm-i386/processor.h kstk-2.5.69-1/include/asm-i386/processor.h
> --- linux-2.5.69/include/asm-i386/processor.h	2003-05-04 16:53:00.000000000 -0700
> +++ kstk-2.5.69-1/include/asm-i386/processor.h	2003-05-12 06:05:39.000000000 -0700
> @@ -470,8 +470,8 @@ extern int kernel_thread(int (*fn)(void 
>  extern unsigned long thread_saved_pc(struct task_struct *tsk);
>  
>  unsigned long get_wchan(struct task_struct *p);
> -#define KSTK_EIP(tsk)	(((unsigned long *)(4096+(unsigned long)(tsk)->thread_info))[1019])
> -#define KSTK_ESP(tsk)	(((unsigned long *)(4096+(unsigned long)(tsk)->thread_info))[1022])
> +#define KSTK_EIP(task)	(((unsigned long *)(task)->thread_info)[THREAD_SIZE/sizeof(unsigned long) - 5])
> +#define KSTK_ESP(task)	(((unsigned long *)(task)->thread_info)[THREAD_SIZE/sizeof(unsigned long) - 2])
>  
>  struct microcode {
>  	unsigned int hdrver;

Can I get some sort of vague explanation please? ;-)

M.