3:59 a.m.
Dave Anderson wrote:
Jun'ichi Nomura wrote:
> 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.
>
>
Nice catch -- I didn't even notice his pagesize. I should learn to
look at my own debug code...
Anyway, it sure looks like it could be the issue here.
Xavier, please try something like this and let us know:
--- ia64.c.orig 2006-01-10 14:07:07.000000000 -0500
+++ ia64.c 2006-01-10 14:07:31.000000000 -0500
@@ -92,6 +92,9 @@ ia64_init(int when)
case 16384:
machdep->stacksize = (power(2, 1) * PAGESIZE());
break;
+ case 65536:
+ machdep->stacksize = (power(2, 0) * PAGESIZE());
+ break;
default:
machdep->stacksize = 32*1024;
break;
Thanks again, Jun-ichi,
Dave
>
> 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
>
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Hello Dave and Jun'ichi
With the patch it works fine !
Thanks again to all.
crash> bt 1
PID: 1 TASK: e000000101630000 CPU: 2 COMMAND: "init"
#0 [BSP:e000000101631330] schedule at a000000100573740
#1 [BSP:e0000001016312f8] schedule_timeout at a000000100576490
#2 [BSP:e0000001016311c8] do_select at a000000100180610
#3 [BSP:e0000001016310e8] sys_select at a000000100181030
#4 [BSP:e0000001016310e8] ia64_ret_from_syscall at a00000010000b460
EFRAME: e00000010163fe40
B0: 4000000000009dd0 CR_IIP: a000000000010640
CR_IPSR: 00001213081a6018 CR_IFS: 0000000000000005
AR_PFS: c000000000000005 AR_RSC: 000000000000000f
AR_UNAT: 0000000000000000 AR_RNAT: 0000000000000000
AR_CCV: 0000000000000000 AR_FPSR: 0009804c8a70033f
LOADRS: 0000000001080000 AR_BSPSTORE: 600fffff7fff00d0
B6: 2000000000269800 B7: 0000000000000000
PR: 0000000000026261 R1: 20000000002e0238
R2: 0000000000000000 R3: ffffffffffff00e0
R8: 8000000000000000 R9: 2000000000345340
R10: 0000000000000000 R11: c000000000000a19
R12: 600fffffffa0d590 R13: 2000000000044ce0
R14: 20000000003410f0 R15: 0000000000000441
R16: 0000000000000000 R17: 0000000000000000
R18: 0000000000000000 R19: 0000000000000000
R20: 0009804c8a70033f R21: 4000000000009bf0
R22: 0000000000000000 R23: 600fffff7fff00d0
R24: 0000000000000000 R25: 0000000000000000
R26: c00000000000020c R27: 000000000000000f
R28: a000000000010640 R29: 00001213081a6018
R30: 0000000000000008 R31: 0000000000026261
F6: 000000000000000000000 F7: 000000000000000000000
F8: 000000000000000000000 F9: 000000000000000000000
F10: 000000000000000000000 F11: 000000000000000000000
crash>