Re: [Crash-utility] Re: backtrace problem with crash 0.2.18 on 2.6.14vanilia 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 -- Crash-utility mailing list Crash-utility(a)redhat.com https://www.redhat.com/mailman/listinfo/crash-utility