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| author | Ingo Molnar <mingo@elte.hu> | 2006-12-13 00:34:43 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-13 09:05:50 -0800 |
| commit | 3117df0453828bd045c16244e6f50e5714667a8a (patch) | |
| tree | 4f24e5b4024359dd42c91b84cbc25280f21b7314 /kernel/sched.c | |
| parent | 27c3b23226fc649de47e4886ccbf994482f388ba (diff) | |
| download | lwn-3117df0453828bd045c16244e6f50e5714667a8a.tar.gz lwn-3117df0453828bd045c16244e6f50e5714667a8a.zip | |
[PATCH] lockdep: print irq-trace info on asserts
When we print an assert due to scheduling-in-atomic bugs, and if lockdep
is enabled, then the IRQ tracing information of lockdep can be printed
to pinpoint the code location that disabled interrupts. This saved me
quite a bit of debugging time in cases where the backtrace did not
identify the irq-disabling site well enough.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 8a0afb97af71..5cd833bc2173 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -3429,6 +3429,8 @@ asmlinkage void __sched schedule(void) "%s/0x%08x/%d\n", current->comm, preempt_count(), current->pid); debug_show_held_locks(current); + if (irqs_disabled()) + print_irqtrace_events(current); dump_stack(); } profile_hit(SCHED_PROFILING, __builtin_return_address(0)); @@ -6977,6 +6979,8 @@ void __might_sleep(char *file, int line) printk("in_atomic():%d, irqs_disabled():%d\n", in_atomic(), irqs_disabled()); debug_show_held_locks(current); + if (irqs_disabled()) + print_irqtrace_events(current); dump_stack(); } #endif |