Hi,
Dave Anderson wrote:
> Xavier also mentioned in a private email that "foreach bt" shows
> nothing for all non-active tasks, so it appears that something has
> changed affecting the ia64 unwind facility. Has anybody else
> running ia64 on 2.6.14 kernels seen this?
While 'bt' just works on my 2.6.15 vanilla kernel (16KB-page),
I noticed Xavier used 64KB-page kernel but crash assumed
stacksize was 32KB.
> xb wrote:
>> pagesize: 65536
...
>> stacksize: 32768
Can this be a cause of the problem?
In kernel, the stack size is 64KB under 64KB-page.
In crash/ia64.c:ia64_init(),
..
case 4096:
machdep->stacksize = (power(2, 3) * PAGESIZE());
break;
case 8192:
machdep->stacksize = (power(2, 2) * PAGESIZE());
break;
case 16384:
machdep->stacksize = (power(2, 1) * PAGESIZE());
break;
default:
machdep->stacksize = 32*1024;
break;
..
In include/asm-ia64/ptrace.h of kernel,
#if defined(CONFIG_IA64_PAGE_SIZE_4KB)
# define KERNEL_STACK_SIZE_ORDER 3
#elif defined(CONFIG_IA64_PAGE_SIZE_8KB)
# define KERNEL_STACK_SIZE_ORDER 2
#elif defined(CONFIG_IA64_PAGE_SIZE_16KB)
# define KERNEL_STACK_SIZE_ORDER 1
#else
# define KERNEL_STACK_SIZE_ORDER 0
#endif
Thanks,
Jun'ichi "Nick" Nomura
