Re: [Crash-utility] Re: backtrace problem with crash 0.2.18 on 2.6.14 vanilia kernel ia64
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