* [Xenomai-core] panic trace to understand migration bug
@ 2006-01-20 13:00 Jan Kiszka
0 siblings, 0 replies; only message in thread
From: Jan Kiszka @ 2006-01-20 13:00 UTC (permalink / raw)
To: xenomai-core
[-- Attachment #1.1: Type: text/plain, Size: 790 bytes --]
Hi all,
here is an extension to the latency tracer. It allows to use it in panic
situations where it provides a back-trace with some additional
information. I also attached a Xenomai patch to use this feature on
xnpod_fatal.
I'm currently trying to understand the crash Jeroen reported. For this
purpose I added a few special traces to shadow.c, see third patch. What
I currently get with CONFIG_XENO_OPT_DEBUG switched on is attached as well.
If anyone can tell something about what's happening here, please share
your wisdom! I'm yet lacking a concrete idea. Currently I'm wondering
why a Linux thread (main, pid 843/0x34b) gets scheduled in by the Linux
scheduler although TASK_INTERRUPTIBLE is set (and while it's Xeno mate
is correctly blocking on a RT-sem).
Jan
[-- Attachment #1.2: ipipe_trace_panic.patch --]
[-- Type: text/plain, Size: 6084 bytes --]
--- linux-2.6.15.1/include/linux/ipipe_trace.h.orig 2006-01-19 10:16:43.000000000 +0100
+++ linux-2.6.15.1/include/linux/ipipe_trace.h 2006-01-19 13:13:07.000000000 +0100
@@ -31,4 +31,7 @@ void ipipe_trace_special(unsigned char s
int ipipe_trace_max_reset(void);
int ipipe_trace_frozen_reset(void);
+void ipipe_trace_panic_freeze(void);
+void ipipe_trace_panic_dump(void);
+
#endif /* !__LINUX_IPIPE_H */
--- linux-2.6.15.1/kernel/ipipe/tracer.c.orig 2006-01-19 10:26:31.000000000 +0100
+++ linux-2.6.15.1/kernel/ipipe/tracer.c 2006-01-20 11:31:58.000000000 +0100
@@ -107,10 +107,17 @@ static int verbose_trace = 0;
static DECLARE_MUTEX(out_mutex);
static struct ipipe_trace_path *print_path;
+static struct ipipe_trace_path *panic_path;
static int print_pre_trace;
static int print_post_trace;
+static long __ipipe_signed_tsc2us(long long tsc);
+static void
+__ipipe_trace_point_type(char *buf, struct ipipe_trace_point *point);
+static void __ipipe_print_symname(struct seq_file *m, unsigned long eip);
+
+
static notrace int __ipipe_get_free_trace_path(int old, int cpu_id)
{
int new_active = old;
@@ -498,6 +505,61 @@ int ipipe_trace_frozen_reset(void)
}
EXPORT_SYMBOL(ipipe_trace_frozen_reset);
+void ipipe_trace_panic_freeze(void)
+{
+ unsigned long flags;
+ int cpu_id;
+
+ ipipe_trace_enable = 0;
+ local_irq_save_hw_notrace(flags);
+
+ cpu_id = raw_smp_processor_id();
+
+ panic_path = &trace_paths[cpu_id][active_path[cpu_id]];
+
+ local_irq_restore_hw(flags);
+}
+EXPORT_SYMBOL(ipipe_trace_panic_freeze);
+
+void ipipe_trace_panic_dump(void)
+{
+ int cnt = back_trace;
+ int start, pos;
+
+ printk("I-pipe tracer log (%d points):\n", cnt);
+
+ start = pos = WRAP_POINT_NO(panic_path->trace_pos-1);
+
+ while (cnt-- > 0) {
+ struct ipipe_trace_point *point = &panic_path->point[pos];
+ long time;
+ char buf[16];
+
+ if (!point->eip)
+ printk("-<invalid>-\n");
+ else {
+ __ipipe_trace_point_type(buf, point);
+ printk(buf);
+
+ if (point->type != IPIPE_TRACE_FN)
+ printk("0x%08lx ", point->v);
+ else
+ printk(" ");
+
+ time = __ipipe_signed_tsc2us(point->timestamp -
+ panic_path->point[start].timestamp);
+ printk(" %5ld ", time);
+
+ __ipipe_print_symname(NULL, point->eip);
+ printk(" (");
+ __ipipe_print_symname(NULL, point->parent_eip);
+ printk(")\n");
+ }
+ pos = WRAP_POINT_NO(pos - 1);
+ }
+}
+EXPORT_SYMBOL(ipipe_trace_panic_dump);
+
/* --- /proc output --- */
@@ -510,6 +572,46 @@ static notrace int __ipipe_in_critical_t
print_post_trace)));
}
+static long __ipipe_signed_tsc2us(long long tsc)
+{
+ unsigned long long abs_tsc;
+ long us;
+
+ /* ipipe_tsc2us works on unsigned => handle sign separately */
+ abs_tsc = (tsc >= 0) ? tsc : -tsc;
+ us = ipipe_tsc2us(abs_tsc);
+ if (tsc < 0)
+ return -us;
+ else
+ return us;
+}
+
+static void
+__ipipe_trace_point_type(char *buf, struct ipipe_trace_point *point)
+{
+ switch (point->type) {
+ case IPIPE_TRACE_FN:
+ strcpy(buf, "fn ");
+ break;
+
+ case IPIPE_TRACE_BEGIN:
+ strcpy(buf, "begin ");
+ break;
+
+ case IPIPE_TRACE_END:
+ strcpy(buf, "end ");
+ break;
+
+ case IPIPE_TRACE_FREEZE:
+ strcpy(buf, "freeze ");
+ break;
+
+ default: /* IPIPE_TRACE_SPECIAL */
+ sprintf(buf, "(0x%02x) ",
+ point->type - IPIPE_TRACE_SPECIAL);
+ }
+}
+
static void
__ipipe_print_pathmark(struct seq_file *m, struct ipipe_trace_point *point)
{
@@ -562,15 +664,26 @@ static void __ipipe_print_symname(struct
char *modname;
sym_name = kallsyms_lookup(eip, &size, &offset, &modname, namebuf);
- if (sym_name) {
- if (verbose_trace) {
- seq_printf(m, "%s+0x%lx", sym_name, offset);
- if (modname)
- seq_printf(m, " [%s]", modname);
+
+ /* printing to /proc? */
+ if (m) {
+ if (sym_name) {
+ if (verbose_trace) {
+ seq_printf(m, "%s+0x%lx", sym_name, offset);
+ if (modname)
+ seq_printf(m, " [%s]", modname);
+ } else
+ seq_puts(m, sym_name);
} else
- seq_puts(m, sym_name);
- } else
- seq_printf(m, "<%08lx>", eip);
+ seq_printf(m, "<%08lx>", eip);
+ } else {
+ /* panic dump */
+ if (sym_name) {
+ printk("%s+0x%lx", sym_name, offset);
+ if (modname)
+ printk(" [%s]", modname);
+ }
+ }
}
#if defined(CONFIG_XENO_OPT_DEBUG) || defined(CONFIG_DEBUG_PREEMPT)
@@ -690,52 +803,28 @@ static void __ipipe_prtrace_stop(struct
static int __ipipe_prtrace_show(struct seq_file *m, void *p)
{
long time;
- long long delta;
- unsigned long long abs_delta;
struct ipipe_trace_point *point = p;
+ char buf[16];
if (!point->eip) {
seq_puts(m, "-<invalid>-\n");
return 0;
}
- /* ipipe_tsc2us works on unsigned => handle sign separately */
- delta = point->timestamp -
- print_path->point[print_path->begin].timestamp;
- abs_delta = (delta >= 0) ? delta : -delta;
- time = ipipe_tsc2us(abs_delta);
- if (delta < 0)
- time = -time;
-
__ipipe_print_pathmark(m, point);
- switch (point->type) {
- case IPIPE_TRACE_FN:
- seq_puts(m, "fn ");
- break;
-
- case IPIPE_TRACE_BEGIN:
- seq_puts(m, "begin ");
- break;
-
- case IPIPE_TRACE_END:
- seq_puts(m, "end ");
- break;
-
- case IPIPE_TRACE_FREEZE:
- seq_puts(m, "freeze ");
- break;
-
- default: /* IPIPE_TRACE_SPECIAL */
- seq_printf(m, "(0x%02x) ",
- point->type - IPIPE_TRACE_SPECIAL);
- }
+ __ipipe_trace_point_type(buf, point);
+ seq_puts(m, buf);
if (verbose_trace) {
if (point->type != IPIPE_TRACE_FN)
seq_printf(m, "0x%08lx ", point->v);
else
seq_puts(m, " ");
}
+
+ time = __ipipe_signed_tsc2us(point->timestamp -
+ print_path->point[print_path->begin].timestamp);
seq_printf(m, "%5ld", time);
+
__ipipe_print_delay(m, point);
__ipipe_print_symname(m, point->eip);
seq_puts(m, " (");
[-- Attachment #1.3: xeno_panic_trace.patch --]
[-- Type: text/plain, Size: 1867 bytes --]
Index: include/asm-generic/system.h
===================================================================
--- include/asm-generic/system.h (revision 470)
+++ include/asm-generic/system.h (working copy)
@@ -39,6 +39,13 @@
#include <asm/xenomai/atomic.h>
#include <xenomai/nucleus/shadow.h>
+#ifdef CONFIG_IPIPE_TRACE
+#include <linux/ipipe_trace.h>
+#else /* !CONFIG_IPIPE_TRACE */
+#define ipipe_trace_panic_freeze()
+#define ipipe_trace_panic_dump()
+#endif /* CONFIG_IPIPE_TRACE */
+
#define module_param_value(parm) (parm)
typedef unsigned long spl_t;
@@ -185,6 +192,7 @@
rthal_emergency_console(); \
xnarch_logerr("fatal: %s\n",emsg); \
show_stack(NULL,NULL); \
+ ipipe_trace_panic_dump(); \
for (;;) cpu_relax(); \
} while(0)
Index: include/nucleus/types.h
===================================================================
--- include/nucleus/types.h (revision 470)
+++ include/nucleus/types.h (working copy)
@@ -106,8 +106,10 @@
#define xnpod_fatal(format,args...) \
do { \
- const char *panic = xnpod_fatal_helper(format,##args); \
- xnarch_halt(panic); \
+ const char *panic; \
+ ipipe_trace_panic_freeze(); \
+ panic = xnpod_fatal_helper(format,##args); \
+ xnarch_halt(panic); \
} while (0)
#if defined(__XENO_SIM__) || defined(__XENO_UVM__)
Index: ksrc/nucleus/shadow.c
===================================================================
--- ksrc/nucleus/shadow.c (revision 470)
+++ ksrc/nucleus/shadow.c (working copy)
@@ -1569,6 +1569,7 @@
testbits(status,XNSTARTED) &&
testbits(status,XNTHREAD_BLOCK_BITS))
{
+ ipipe_trace_panic_freeze();
show_stack(xnthread_user_task(threadin),NULL);
xnpod_fatal("blocked thread %s[%d] rescheduled?! (status=0x%lx, sig=%d, prev=%s[%d])",
threadin->name,
[-- Attachment #1.4: shadow-instr.patch --]
[-- Type: text/plain, Size: 1295 bytes --]
Index: ksrc/nucleus/shadow.c
===================================================================
--- ksrc/nucleus/shadow.c (revision 470)
+++ ksrc/nucleus/shadow.c (working copy)
@@ -384,6 +384,7 @@
xnlock_get_irqsave(&nklock, s);
thread = gk->thread;
+ipipe_trace_special(1, xnthread_archtcb(thread)->user_task->pid);
/* In the very rare case where the requestor has been awaken
by a signal before we have been able to process the
@@ -459,6 +460,7 @@
gk->thread = thread;
set_current_state(TASK_INTERRUPTIBLE);
wake_up_interruptible_sync(&gk->waitq);
+ipipe_trace_special(2, current->pid);
if (rthal_current_domain == rthal_root_domain) {
@@ -575,6 +577,7 @@
set_current_state((current->state&~TASK_UNINTERRUPTIBLE)|TASK_INTERRUPTIBLE);
schedule_linux_call(LO_WAKEUP_REQ,current,0);
+ipipe_trace_special(3, current->pid);
splhigh(s);
xnpod_renice_root(thread->cprio);
@@ -1520,6 +1523,10 @@
prev = current;
threadin = xnshadow_thread(next);
+ipipe_trace_special(4, prev->pid);
+ipipe_trace_special(4, prev->state);
+ipipe_trace_special(5, next->pid);
+ipipe_trace_special(5, next->state);
rthal_load_cpuid(); /* Linux is running in a migration-safe
portion of code. */
[-- Attachment #1.5: migr-panic.trace --]
[-- Type: text/plain, Size: 26742 bytes --]
I-pipe: Domain Xenomai registered.
Xenomai: hal/x86 started.
Xenomai: real-time nucleus v2.1-rc2 (Champagne) loaded.
Xenomai: starting native API services.
c30ebe98 00000082 c110d070 c30ebe68 c482ad60 00000001 00000001 00200000
c482ad60 00000002 ffffffff 00000004 ffffffff c482afb8 c482a3b4 c30ebe98
c110d070 c30c9570 c486ade0 c4850033 00000000 c486c090 c482afa4 c482ad60
Call Trace:
[<c485590a>] xnpod_suspend_thread+0x7a7/0x7f7 [xeno_nucleus]
[<c485a033>] xnsynch_sleep_on+0x7e3/0x815 [xeno_nucleus]
[<c4a0a30f>] rt_sem_p+0xa6/0x10a [xeno_native]
[<c4a03ed2>] __rt_sem_p+0x5f/0x69 [xeno_native]
[<c485ee68>] hisyscall_event+0x1d1/0x2d9 [xeno_nucleus]
[<c01301ed>] __ipipe_dispatch_event+0x5e/0xe5
[<c010bbbf>] __ipipe_syscall_root+0x58/0xc2
[<c0102ac0>] system_call+0x20/0x41
Xenomai: fatal: blocked thread main[843] rescheduled?! (status=0x300082, sig=0, prev=gatekeeper/0[800])
CPU PID PRI TIMEOUT STAT NAME
> 0 0 30 0 00500080 ROOT
0 844 30 0 00300180 task0
0 843 1 0 00300082 main
Timer: oneshot [tickval=1 ns, elapsed=202377277237]
c3155f04 c48645b2 c30ec000 c30c9570 00300082 c02af500 00000286 c02af500
c3155f58 c01301ed 00000022 c02af500 c110d070 c110d070 00000022 c049bbec
00000001 c02af500 c110d070 19339e6c 0000002f c3155f94 c02733bc 000035d5
Call Trace:
[<c01031ae>] show_stack+0x7d/0x88
[<c485f305>] schedule_event+0x1d4/0x288 [xeno_nucleus]
[<c01301ed>] __ipipe_dispatch_event+0x5e/0xe5
[<c02733bc>] schedule+0x3f2/0x5f0
[<c485dea8>] gatekeeper_thread+0xa1/0x19b [xeno_nucleus]
[<c01268be>] kthread+0x71/0x9f
[<c0100dcd>] kernel_thread_helper+0x5/0xb
I-pipe tracer log (300 points):
fn 0 ipipe_trace_panic_freeze+0x8 (schedule_event+0x16d [xeno_nucleus])
(0x05) 0x00000001 -1 schedule_event+0x78 [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
(0x05) 0x0000034b -2 schedule_event+0x6b [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
(0x04) 0x00000001 -3 schedule_event+0x5b [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
(0x04) 0x00000320 -4 schedule_event+0x4e [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -5 schedule_event+0xd [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -6 __ipipe_dispatch_event+0xe (schedule+0x3f2)
fn -9 dequeue_task+0xa (deactivate_task+0x1a)
fn -10 deactivate_task+0x9 (schedule+0x1fe)
fn -12 __ipipe_stall_root+0x8 (schedule+0x16e)
fn -13 sched_clock+0xd (schedule+0xf2)
fn -14 profile_hit+0x9 (schedule+0x62)
fn -16 schedule+0xe (gatekeeper_thread+0xa1 [xeno_nucleus])
fn -21 __switch_to+0xc (xnpod_schedule+0x9be [xeno_nucleus])
fn -25 xnpod_schedule+0xe [xeno_nucleus] (xnpod_suspend_thread+0x7a7 [xeno_nucleus])
fn -33 xntimer_do_start_aperiodic+0xe [xeno_nucleus] (xntimer_start+0x37 [xeno_nucleus])
fn -34 xntimer_start+0x9 [xeno_nucleus] (xnpod_suspend_thread+0x797 [xeno_nucleus])
fn -38 xnpod_suspend_thread+0xe [xeno_nucleus] (rt_task_sleep+0x54 [xeno_native])
fn -39 rt_task_sleep+0xa [xeno_native] (__rt_task_sleep+0x25 [xeno_native])
fn -40 __copy_from_user_ll+0xa (__rt_task_sleep+0x1a [xeno_native])
fn -41 __rt_task_sleep+0xa [xeno_native] (hisyscall_event+0x1d1 [xeno_nucleus])
fn -44 hisyscall_event+0xe [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -46 __ipipe_dispatch_event+0xe (__ipipe_syscall_root+0x58)
fn -47 __ipipe_syscall_root+0x9 (system_call+0x20)
fn -58 ipipe_unstall_pipeline_from+0xc (rt_mutex_unlock+0xdf [xeno_native])
fn -60 xnsynch_wakeup_one_sleeper+0xe [xeno_nucleus] (rt_mutex_unlock+0x92 [xeno_native])
fn -62 rt_mutex_unlock+0xb [xeno_native] (__rt_mutex_unlock+0x43 [xeno_native])
fn -63 ipipe_unstall_pipeline_from+0xc (rt_registry_fetch+0xa4 [xeno_native])
fn -65 rt_registry_fetch+0xa [xeno_native] (__rt_mutex_unlock+0x36 [xeno_native])
fn -66 __rt_mutex_unlock+0xa [xeno_native] (losyscall_event+0xb6 [xeno_nucleus])
fn -68 ipipe_unstall_pipeline_from+0xc (xnshadow_harden+0x156 [xeno_nucleus])
fn -70 xnpod_switch_fpu+0xa [xeno_nucleus] (xnshadow_harden+0x137 [xeno_nucleus])
fn -72 __switch_to+0xc (schedule+0x4de)
fn -80 xnpod_schedule+0xe [xeno_nucleus] (xnpod_schedule_handler+0x17 [xeno_nucleus])
fn -81 xnpod_schedule_handler+0x8 [xeno_nucleus] (__ipipe_sync_stage+0x113)
fn -83 __ipipe_sync_stage+0xe (ipipe_suspend_domain+0x47)
fn -84 ipipe_suspend_domain+0xb (ipipe_unstall_pipeline_from+0x4e)
fn -86 ipipe_unstall_pipeline_from+0xc (gatekeeper_thread+0x18c [xeno_nucleus])
fn -90 __ipipe_handle_irq+0xe (ipipe_trigger_irq+0x51)
fn -91 memcpy+0xb (ipipe_trigger_irq+0x49)
fn -92 ipipe_trigger_irq+0xc (xnpod_schedule+0x29 [xeno_nucleus])
fn -93 xnpod_schedule+0xe [xeno_nucleus] (gatekeeper_thread+0x15e [xeno_nucleus])
fn -99 xnpod_schedule_runnable+0xe [xeno_nucleus] (gatekeeper_thread+0x132 [xeno_nucleus])
fn -105 xnpod_resume_thread+0xe [xeno_nucleus] (gatekeeper_thread+0xf6 [xeno_nucleus])
(0x01) 0x0000034c -106 gatekeeper_thread+0xde [xeno_nucleus] (kthread+0x71)
fn -107 kthread_should_stop+0x8 (gatekeeper_thread+0xa6 [xeno_nucleus])
fn -109 __ipipe_unstall_root+0x8 (schedule+0x516)
fn -112 __switch_to+0xc (schedule+0x4de)
(0x05) 0x00000000 -113 schedule_event+0x78 [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
(0x05) 0x00000320 -114 schedule_event+0x6b [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
(0x04) 0x00000001 -114 schedule_event+0x5b [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
(0x04) 0x0000034c -115 schedule_event+0x4e [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -116 schedule_event+0xd [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -117 __ipipe_dispatch_event+0xe (schedule+0x3f2)
fn -119 dequeue_task+0xa (deactivate_task+0x1a)
fn -121 deactivate_task+0x9 (schedule+0x1fe)
fn -122 __ipipe_stall_root+0x8 (schedule+0x16e)
fn -123 sched_clock+0xd (schedule+0xf2)
fn -124 profile_hit+0x9 (schedule+0x62)
fn -125 schedule+0xe (xnshadow_harden+0xa6 [xeno_nucleus])
(0x02) 0x0000034c -126 xnshadow_harden+0x8e [xeno_nucleus] (losyscall_event+0x91 [xeno_nucleus])
fn -128 __ipipe_unstall_root+0x8 (__ipipe_restore_root+0x2b)
fn -129 __ipipe_restore_root+0x8 (__wake_up_sync+0x6b)
fn -130 __ipipe_restore_root+0x8 (try_to_wake_up+0xb7)
fn -132 enqueue_task+0xa (activate_task+0x5d)
fn -133 sched_clock+0xd (activate_task+0x13)
fn -134 activate_task+0xb (try_to_wake_up+0x7d)
fn -136 __ipipe_test_and_stall_root+0x8 (try_to_wake_up+0x13)
fn -136 try_to_wake_up+0xb (default_wake_function+0x19)
fn -137 default_wake_function+0x8 (__wake_up_common+0x2a)
fn -139 __wake_up_common+0xb (__wake_up_sync+0x5e)
fn -141 __ipipe_test_and_stall_root+0x8 (__wake_up_sync+0x2a)
fn -142 __wake_up_sync+0xd (xnshadow_harden+0x7f [xeno_nucleus])
fn -143 __ipipe_test_root+0x8 (__might_sleep+0x1e)
fn -144 __might_sleep+0x9 (xnshadow_harden+0x45 [xeno_nucleus])
fn -145 xnshadow_harden+0xb [xeno_nucleus] (losyscall_event+0x91 [xeno_nucleus])
fn -146 losyscall_event+0xd [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -149 ipipe_unstall_pipeline_from+0xc (xnpod_schedule+0xc1b [xeno_nucleus])
fn -152 xnpod_schedule+0xe [xeno_nucleus] (hisyscall_event+0x3e [xeno_nucleus])
fn -153 hisyscall_event+0xe [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -155 __ipipe_dispatch_event+0xe (__ipipe_syscall_root+0x58)
fn -156 __ipipe_syscall_root+0x9 (system_call+0x20)
fn -163 __ipipe_unstall_iret_root+0x8 (restore_raw+0x0)
fn -164 __ipipe_stall_root+0x8 (syscall_exit+0x5)
fn -165 fput+0x8 (sys_write+0x5d)
fn -166 inotify_inode_queue_event+0xe (vfs_write+0xed)
fn -168 inotify_dentry_parent_queue_event+0xa (vfs_write+0xe2)
fn -170 dnotify_parent+0xa (vfs_write+0xc9)
fn -174 cond_resched+0x9 (generic_file_buffered_write+0x427)
fn -176 balance_dirty_pages_ratelimited+0x8 (generic_file_buffered_write+0x422)
fn -177 put_page+0x8 (generic_file_buffered_write+0x415)
fn -179 mark_page_accessed+0x9 (generic_file_buffered_write+0x40f)
fn -180 __wake_up_bit+0xb (unlock_page+0x2d)
fn -182 page_waitqueue+0x8 (unlock_page+0x23)
fn -183 unlock_page+0x9 (generic_file_buffered_write+0x408)
fn -185 __mark_inode_dirty+0xd (generic_commit_write+0xb0)
fn -187 mark_buffer_dirty+0x8 (__block_commit_write+0x6f)
fn -189 __block_commit_write+0xd (generic_commit_write+0x39)
fn -189 generic_commit_write+0xc (generic_file_buffered_write+0x384)
fn -191 __copy_from_user_ll+0xa (generic_file_buffered_write+0x2bd)
fn -197 __block_prepare_write+0xe (block_prepare_write+0x20)
fn -198 block_prepare_write+0x9 (ext2_prepare_write+0x1b)
fn -199 ext2_prepare_write+0x8 (generic_file_buffered_write+0x1e8)
fn -202 __ipipe_unstall_root+0x8 (find_lock_page+0xfc)
fn -203 radix_tree_lookup+0xb (find_lock_page+0x37)
fn -204 __ipipe_stall_root+0x8 (find_lock_page+0x16)
fn -205 find_lock_page+0xb (generic_file_buffered_write+0x120)
fn -208 generic_file_buffered_write+0xe (__generic_file_aio_write_nolock+0x3cf)
fn -210 timespec_trunc+0xb (current_fs_time+0x41)
fn -212 current_fs_time+0xd (inode_update_time+0x2e)
fn -214 inode_update_time+0xc (__generic_file_aio_write_nolock+0x37a)
fn -215 remove_suid+0xc (__generic_file_aio_write_nolock+0x367)
fn -221 __generic_file_aio_write_nolock+0xe (__generic_file_write_nolock+0x7d)
fn -222 __generic_file_write_nolock+0xc (generic_file_write+0x4c)
fn -224 __ipipe_test_root+0x8 (__might_sleep+0x1e)
fn -224 __might_sleep+0x9 (generic_file_write+0x34)
fn -226 generic_file_write+0xe (vfs_write+0x8f)
fn -227 rw_verify_area+0xb (vfs_write+0x6f)
fn -229 vfs_write+0xc (sys_write+0x3f)
fn -232 fget_light+0xb (sys_write+0x1d)
fn -233 sys_write+0xd (syscall_call+0x7)
fn -235 losyscall_event+0xd [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -238 __ipipe_unstall_root+0x8 (ipipe_reenter_root+0x26)
fn -239 ipipe_reenter_root+0xb (xnshadow_relax+0x1cb [xeno_nucleus])
fn -241 ipipe_unstall_pipeline_from+0xc (xnshadow_relax+0x13e [xeno_nucleus])
fn -246 __switch_to+0xc (xnpod_schedule+0x9be [xeno_nucleus])
fn -249 ipipe_unstall_pipeline_from+0xc (schedule_event+0x265 [xeno_nucleus])
fn -254 xnpod_schedule_runnable+0xe [xeno_nucleus] (schedule_event+0x23e [xeno_nucleus])
(0x05) 0x00000000 -256 schedule_event+0x78 [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
(0x05) 0x0000034c -257 schedule_event+0x6b [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
(0x04) 0x00000001 -257 schedule_event+0x5b [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
(0x04) 0x00000320 -258 schedule_event+0x4e [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -259 schedule_event+0xd [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -261 __ipipe_dispatch_event+0xe (schedule+0x3f2)
fn -263 dequeue_task+0xa (deactivate_task+0x1a)
fn -264 deactivate_task+0x9 (schedule+0x1fe)
fn -266 __ipipe_stall_root+0x8 (schedule+0x16e)
fn -267 sched_clock+0xd (schedule+0xf2)
fn -269 profile_hit+0x9 (schedule+0x62)
fn -270 schedule+0xe (gatekeeper_thread+0xa1 [xeno_nucleus])
fn -275 __switch_to+0xc (xnpod_schedule+0x9be [xeno_nucleus])
fn -278 xnpod_schedule+0xe [xeno_nucleus] (xnpod_suspend_thread+0x7a7 [xeno_nucleus])
fn -282 xnpod_suspend_thread+0xe [xeno_nucleus] (xnsynch_sleep_on+0x7e3 [xeno_nucleus])
fn -286 xnsynch_sleep_on+0xe [xeno_nucleus] (rt_sem_p+0xa6 [xeno_native])
fn -288 rt_sem_p+0xb [xeno_native] (__rt_sem_p+0x5f [xeno_native])
fn -290 __copy_from_user_ll+0xa (__rt_sem_p+0x53 [xeno_native])
fn -291 ipipe_unstall_pipeline_from+0xc (rt_registry_fetch+0xa4 [xeno_native])
fn -292 rt_registry_fetch+0xa [xeno_native] (__rt_sem_p+0x39 [xeno_native])
fn -293 __rt_sem_p+0xd [xeno_native] (hisyscall_event+0x1d1 [xeno_nucleus])
fn -296 hisyscall_event+0xe [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -299 __ipipe_dispatch_event+0xe (__ipipe_syscall_root+0x58)
fn -300 __ipipe_syscall_root+0x9 (system_call+0x20)
fn -341 ipipe_unstall_pipeline_from+0xc (xnshadow_harden+0x156 [xeno_nucleus])
fn -343 xnpod_switch_fpu+0xa [xeno_nucleus] (xnshadow_harden+0x137 [xeno_nucleus])
(0x02) 0x0000034b -344 xnshadow_harden+0x8e [xeno_nucleus] (xnshadow_map+0x139 [xeno_nucleus])
fn -347 __switch_to+0xc (schedule+0x4de)
fn -353 xnpod_schedule+0xe [xeno_nucleus] (xnpod_schedule_handler+0x17 [xeno_nucleus])
fn -354 xnpod_schedule_handler+0x8 [xeno_nucleus] (__ipipe_sync_stage+0x113)
fn -356 __ipipe_sync_stage+0xe (ipipe_suspend_domain+0x47)
fn -357 ipipe_suspend_domain+0xb (ipipe_unstall_pipeline_from+0x4e)
fn -358 ipipe_unstall_pipeline_from+0xc (gatekeeper_thread+0x18c [xeno_nucleus])
fn -362 __ipipe_handle_irq+0xe (ipipe_trigger_irq+0x51)
fn -363 memcpy+0xb (ipipe_trigger_irq+0x49)
fn -364 ipipe_trigger_irq+0xc (xnpod_schedule+0x29 [xeno_nucleus])
fn -365 xnpod_schedule+0xe [xeno_nucleus] (gatekeeper_thread+0x15e [xeno_nucleus])
fn -369 xnpod_schedule_runnable+0xe [xeno_nucleus] (gatekeeper_thread+0x132 [xeno_nucleus])
fn -375 xnpod_resume_thread+0xe [xeno_nucleus] (gatekeeper_thread+0xf6 [xeno_nucleus])
(0x01) 0x0000034b -376 gatekeeper_thread+0xde [xeno_nucleus] (kthread+0x71)
fn -377 kthread_should_stop+0x8 (gatekeeper_thread+0xa6 [xeno_nucleus])
fn -379 __ipipe_unstall_root+0x8 (schedule+0x516)
fn -381 __switch_to+0xc (schedule+0x4de)
(0x05) 0x00000000 -382 schedule_event+0x78 [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
(0x05) 0x00000320 -383 schedule_event+0x6b [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
(0x04) 0x00000001 -384 schedule_event+0x5b [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
(0x04) 0x0000034b -385 schedule_event+0x4e [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -386 schedule_event+0xd [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -388 __ipipe_dispatch_event+0xe (schedule+0x3f2)
fn -390 __ipipe_stall_root+0x8 (schedule+0x16e)
fn -392 sched_clock+0xd (schedule+0xf2)
fn -393 profile_hit+0x9 (schedule+0x62)
fn -394 schedule+0xe (preempt_schedule+0x4d)
fn -395 __ipipe_test_root+0x8 (preempt_schedule+0x2c)
fn -396 preempt_schedule+0xb (__wake_up_sync+0xa5)
fn -397 irq_exit+0x8 (__ipipe_sync_stage+0xfe)
fn -398 __ipipe_unstall_iret_root+0x8 (restore_raw+0x0)
fn -400 __ipipe_stall_root+0x8 (resume_kernel+0x5)
fn -402 preempt_schedule+0xb (try_to_wake_up+0xee)
fn -403 __ipipe_restore_root+0x8 (try_to_wake_up+0xb7)
fn -404 enqueue_task+0xa (activate_task+0x5d)
fn -405 sched_clock+0xd (activate_task+0x13)
fn -406 activate_task+0xb (try_to_wake_up+0x7d)
fn -407 __ipipe_test_and_stall_root+0x8 (try_to_wake_up+0x13)
fn -408 try_to_wake_up+0xb (wake_up_process+0x12)
fn -409 wake_up_process+0x8 (lostage_handler+0xd2 [xeno_nucleus])
fn -411 lostage_handler+0xa [xeno_nucleus] (rthal_apc_handler+0x2c)
fn -412 rthal_apc_handler+0x8 (__ipipe_sync_stage+0xf1)
fn -414 __ipipe_sync_stage+0xe (__ipipe_unstall_root+0x26)
fn -415 __ipipe_unstall_root+0x8 (__ipipe_restore_root+0x2b)
fn -416 __ipipe_restore_root+0x8 (__wake_up_sync+0x6b)
fn -418 __ipipe_restore_root+0x8 (try_to_wake_up+0xb7)
fn -419 enqueue_task+0xa (activate_task+0x5d)
fn -421 sched_clock+0xd (activate_task+0x13)
fn -422 activate_task+0xb (try_to_wake_up+0x7d)
fn -428 __switch_to+0xc (xnpod_schedule+0x9be [xeno_nucleus])
fn -431 xnpod_schedule+0xe [xeno_nucleus] (xnpod_suspend_thread+0x7a7 [xeno_nucleus])
fn -436 xnpod_suspend_thread+0xe [xeno_nucleus] (xnshadow_relax+0x116 [xeno_nucleus])
fn -446 xnpod_schedule_runnable+0xe [xeno_nucleus] (xnshadow_relax+0xde [xeno_nucleus])
(0x03) 0x0000034c -447 xnshadow_relax+0x8f [xeno_nucleus] (hisyscall_event+0x289 [xeno_nucleus])
fn -450 __ipipe_schedule_irq+0xa (rthal_apc_schedule+0x34)
fn -451 rthal_apc_schedule+0x8 (schedule_linux_call+0x7e [xeno_nucleus])
fn -453 ipipe_unstall_pipeline_from+0xc (schedule_linux_call+0x73 [xeno_nucleus])
fn -455 schedule_linux_call+0x9 [xeno_nucleus] (xnshadow_relax+0x80 [xeno_nucleus])
fn -456 xnshadow_relax+0xb [xeno_nucleus] (hisyscall_event+0x289 [xeno_nucleus])
fn -457 hisyscall_event+0xe [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -458 __ipipe_dispatch_event+0xe (__ipipe_syscall_root+0x58)
fn -459 __ipipe_syscall_root+0x9 (system_call+0x20)
fn -463 __copy_to_user_ll+0xa (__rt_mutex_inquire+0x6f [xeno_native])
fn -465 ipipe_unstall_pipeline_from+0xc (rt_mutex_inquire+0x79 [xeno_native])
fn -466 rt_mutex_inquire+0xb [xeno_native] (__rt_mutex_inquire+0x5c [xeno_native])
fn -467 ipipe_unstall_pipeline_from+0xc (rt_registry_fetch+0xa4 [xeno_native])
fn -468 rt_registry_fetch+0xa [xeno_native] (__rt_mutex_inquire+0x48 [xeno_native])
fn -470 __rt_mutex_inquire+0xe [xeno_native] (hisyscall_event+0x1d1 [xeno_nucleus])
fn -472 hisyscall_event+0xe [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -472 __ipipe_dispatch_event+0xe (__ipipe_syscall_root+0x58)
fn -473 __ipipe_syscall_root+0x9 (system_call+0x20)
fn -477 ipipe_unstall_pipeline_from+0xc (rt_mutex_lock+0x122 [xeno_native])
fn -479 rt_mutex_lock+0xc [xeno_native] (__rt_mutex_lock+0x63 [xeno_native])
fn -480 ipipe_unstall_pipeline_from+0xc (rt_registry_fetch+0xa4 [xeno_native])
fn -482 rt_registry_fetch+0xa [xeno_native] (__rt_mutex_lock+0x49 [xeno_native])
fn -483 __copy_from_user_ll+0xa (__rt_mutex_lock+0x41 [xeno_native])
fn -484 __rt_mutex_lock+0xd [xeno_native] (hisyscall_event+0x1d1 [xeno_nucleus])
fn -487 hisyscall_event+0xe [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -487 __ipipe_dispatch_event+0xe (__ipipe_syscall_root+0x58)
fn -488 __ipipe_syscall_root+0x9 (system_call+0x20)
fn -494 ipipe_unstall_pipeline_from+0xc (xnpod_suspend_thread+0x7ef [xeno_nucleus])
fn -500 __switch_to+0xc (xnpod_schedule+0x9be [xeno_nucleus])
fn -507 xnpod_schedule+0xe [xeno_nucleus] (xnintr_irq_handler+0x74 [xeno_nucleus])
fn -514 xnpod_resume_thread+0xe [xeno_nucleus] (xnthread_timeout_handler+0x1d [xeno_nucleus])
fn -515 xnthread_timeout_handler+0x8 [xeno_nucleus] (xntimer_do_tick_aperiodic+0x1f1 [xeno_nucleus])
fn -519 xntimer_do_tick_aperiodic+0xe [xeno_nucleus] (xnpod_announce_tick+0xd6 [xeno_nucleus])
fn -521 xnpod_announce_tick+0xb [xeno_nucleus] (xnintr_irq_handler+0x28 [xeno_nucleus])
fn -522 xnintr_irq_handler+0xb [xeno_nucleus] (xnintr_clock_handler+0x18 [xeno_nucleus])
fn -523 xnintr_clock_handler+0x8 [xeno_nucleus] (__ipipe_sync_stage+0x113)
fn -525 __ipipe_sync_stage+0xe (ipipe_suspend_domain+0x47)
fn -526 ipipe_suspend_domain+0xb (__ipipe_handle_irq+0x15f)
fn -528 mask_and_ack_8259A+0xb (__ipipe_ack_common_irq+0x47)
fn -530 __ipipe_ack_common_irq+0x9 (__ipipe_handle_irq+0xc0)
fn -531 __ipipe_handle_irq+0xe (common_interrupt+0x18)
fn -534 __ipipe_test_and_stall_root+0x8 (try_to_wake_up+0x13)
fn -535 try_to_wake_up+0xb (default_wake_function+0x19)
fn -536 default_wake_function+0x8 (__wake_up_common+0x2a)
fn -537 __wake_up_common+0xb (__wake_up_sync+0x5e)
fn -537 __ipipe_test_and_stall_root+0x8 (__wake_up_sync+0x2a)
fn -538 __wake_up_sync+0xd (xnshadow_harden+0x7f [xeno_nucleus])
fn -540 __ipipe_test_root+0x8 (__might_sleep+0x1e)
fn -540 __might_sleep+0x9 (xnshadow_harden+0x45 [xeno_nucleus])
fn -542 xnshadow_harden+0xb [xeno_nucleus] (xnshadow_map+0x139 [xeno_nucleus])
fn -544 xnpod_schedule+0xe [xeno_nucleus] (xnpod_schedule_handler+0x17 [xeno_nucleus])
fn -546 xnpod_schedule_handler+0x8 [xeno_nucleus] (__ipipe_sync_stage+0x113)
fn -547 __ipipe_sync_stage+0xe (ipipe_suspend_domain+0x47)
fn -548 ipipe_suspend_domain+0xb (__ipipe_handle_irq+0x15f)
fn -551 __ipipe_handle_irq+0xe (ipipe_trigger_irq+0x51)
fn -553 memcpy+0xb (ipipe_trigger_irq+0x49)
fn -554 ipipe_trigger_irq+0xc (xnpod_schedule+0x29 [xeno_nucleus])
fn -555 xnpod_schedule+0xe [xeno_nucleus] (xnpod_start_thread+0x1ea [xeno_nucleus])
fn -556 ipipe_unstall_pipeline_from+0xc (xnshadow_start+0x59 [xeno_nucleus])
fn -559 xnpod_resume_thread+0xe [xeno_nucleus] (xnshadow_start+0x2c [xeno_nucleus])
fn -560 xnshadow_start+0xa [xeno_nucleus] (xnpod_start_thread+0x1e3 [xeno_nucleus])
fn -561 ipipe_unstall_pipeline_from+0xc (xnpod_start_thread+0x1db [xeno_nucleus])
fn -564 xnpod_start_thread+0xe [xeno_nucleus] (xnshadow_map+0x134 [xeno_nucleus])
fn -566 ipipe_unstall_pipeline_from+0xc (xnpod_suspend_thread+0x7ef [xeno_nucleus])
fn -568 xnpod_suspend_thread+0xe [xeno_nucleus] (xnshadow_map+0xf2 [xeno_nucleus])
fn -571 __ipipe_unstall_root+0x8 (schedule+0x516)
fn -574 __switch_to+0xc (schedule+0x4de)
(0x05) 0x00000000 -576 schedule_event+0x78 [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
(0x05) 0x0000034b -577 schedule_event+0x6b [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
(0x04) 0x00000001 -577 schedule_event+0x5b [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
(0x04) 0x00000320 -578 schedule_event+0x4e [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -579 schedule_event+0xd [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -580 __ipipe_dispatch_event+0xe (schedule+0x3f2)
fn -583 dequeue_task+0xa (deactivate_task+0x1a)
fn -584 deactivate_task+0x9 (schedule+0x1fe)
fn -586 __ipipe_stall_root+0x8 (schedule+0x16e)
fn -588 sched_clock+0xd (schedule+0xf2)
fn -589 profile_hit+0x9 (schedule+0x62)
fn -590 schedule+0xe (gatekeeper_thread+0xa1 [xeno_nucleus])
fn -596 __switch_to+0xc (xnpod_schedule+0x9be [xeno_nucleus])
fn -601 xnpod_schedule+0xe [xeno_nucleus] (xnpod_suspend_thread+0x7a7 [xeno_nucleus])
fn -609 xntimer_do_start_aperiodic+0xe [xeno_nucleus] (xntimer_start+0x37 [xeno_nucleus])
fn -611 xntimer_start+0x9 [xeno_nucleus] (xnpod_suspend_thread+0x797 [xeno_nucleus])
fn -614 xnpod_suspend_thread+0xe [xeno_nucleus] (rt_task_sleep+0x54 [xeno_native])
fn -615 rt_task_sleep+0xa [xeno_native] (__rt_task_sleep+0x25 [xeno_native])
fn -617 __copy_from_user_ll+0xa (__rt_task_sleep+0x1a [xeno_native])
fn -618 __rt_task_sleep+0xa [xeno_native] (hisyscall_event+0x1d1 [xeno_nucleus])
fn -621 hisyscall_event+0xe [xeno_nucleus] (__ipipe_dispatch_event+0x5e)
fn -622 __ipipe_dispatch_event+0xe (__ipipe_syscall_root+0x58)
fn -623 __ipipe_syscall_root+0x9 (system_call+0x20)
fn -637 ipipe_unstall_pipeline_from+0xc (rt_mutex_unlock+0xdf [xeno_native])
fn -640 xnsynch_wakeup_one_sleeper+0xe [xeno_nucleus] (rt_mutex_unlock+0x92 [xeno_native])
fn -642 rt_mutex_unlock+0xb [xeno_native] (__rt_mutex_unlock+0x43 [xeno_native])
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2006-01-20 13:00 [Xenomai-core] panic trace to understand migration bug Jan Kiszka
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