I have some legacy code and I think I run into some
kind of stack overflow with it. To verify that, I tried
increasing the stack size from 8K to 16K. I changed
the following files
processor.h
current.h
vmlinux.lds
head.S
The changes were kind of obvious. I know the PARISC guys
have done something similar. Is there something missing
with my changes, since the kernel does not come up,
it is unable to start even kswapd. The diffs have been
include below. Please cc to me in your reply since
I am not hooked onto lkml.
All help appreciated,
Thanks,
Balbir
--- processor.h.org Wed Feb 6 15:10:37 2002
+++ processor.h Wed Feb 6 15:53:10 2002
@@ -447,9 +447,9 @@
#define KSTK_EIP(tsk) (((unsigned long *)(4096+(unsigned
long)(tsk)))[1019])
#define KSTK_ESP(tsk) (((unsigned long *)(4096+(unsigned
long)(tsk)))[1022])
-#define THREAD_SIZE (2*PAGE_SIZE)
-#define alloc_task_struct() ((struct task_struct *)
__get_free_pages(GFP_KERNEL,1))
-#define free_task_struct(p) free_pages((unsigned long) (p), 1)
+#define THREAD_SIZE (4*PAGE_SIZE)
+#define alloc_task_struct() ((struct task_struct *)
__get_free_pages(GFP_KERNEL,2))
+#define free_task_struct(p) free_pages((unsigned long) (p), 2)
#define get_task_struct(tsk) atomic_inc(&virt_to_page(tsk)->count)
#define init_task (init_task_union.task)
--- current.h.org Wed Feb 6 15:11:51 2002
+++ current.h Wed Feb 6 15:52:12 2002
@@ -6,7 +6,7 @@
static inline struct task_struct * get_current(void)
{
struct task_struct *current;
- __asm__("andl %%esp,%0; ":"=r" (current) : "0" (~8191UL));
+ __asm__("andl %%esp,%0; ":"=r" (current) : "0" (~(THREAD_SIZE -
1)));
return current;
}
--- vmlinux.lds.org Wed Feb 6 15:41:07 2002
+++ vmlinux.lds Wed Feb 6 15:41:15 2002
@@ -36,7 +36,7 @@
_edata = .; /* End of data section */
- . = ALIGN(8192); /* init_task */
+ . = ALIGN(16384); /* init_task */
.data.init_task : { *(.data.init_task) }
. = ALIGN(4096); /* Init code and data */
--- head.S.org Wed Feb 6 16:21:47 2002
+++ head.S Wed Feb 6 16:22:21 2002
@@ -320,7 +320,7 @@
ret
ENTRY(stack_start)
- .long SYMBOL_NAME(init_task_union)+8192
+ .long SYMBOL_NAME(init_task_union)+16384
.long __KERNEL_DS
/* This is the default interrupt "handler" :-) */
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This archive was generated by hypermail 2b29 : Thu Feb 07 2002 - 21:00:55 EST