Re: 2.5.69-mjb1

Martin J. Bligh (mbligh@aracnet.com)
Mon, 12 May 2003 05:40:55 -0700


--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.

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