linux-kernel - [patch] lockdep: show held locks when showing a stackdump

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Message-ID: <20061116100852.GA5864@elte.hu>
Date:	Thu, 16 Nov 2006 11:08:52 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Andrew Morton <akpm@...l.org>
Cc:	linux-kernel@...r.kernel.org
Subject: [patch] lockdep: show held locks when showing a stackdump

Subject: [patch] lockdep: show held locks when showing a stackdump
From: Ingo Molnar <mingo@...e.hu>

lockdep can be used to print held locks when printing a
backtrace. This can be useful when debugging things like
'scheduling while atomic' asserts.

Signed-off-by: Ingo Molnar <mingo@...e.hu>

---
 arch/i386/kernel/traps.c   |    1 +
 arch/x86_64/kernel/traps.c |    1 +
 2 files changed, 2 insertions(+)

Index: linux/arch/i386/kernel/traps.c
===================================================================
--- linux.orig/arch/i386/kernel/traps.c
+++ linux/arch/i386/kernel/traps.c
@@ -318,6 +318,7 @@ static void show_stack_log_lvl(struct ta
 	}
 	printk("\n%sCall Trace:\n", log_lvl);
 	show_trace_log_lvl(task, regs, esp, log_lvl);
+	debug_show_held_locks(task);
 }
 
 void show_stack(struct task_struct *task, unsigned long *esp)
Index: linux/arch/x86_64/kernel/traps.c
===================================================================
--- linux.orig/arch/x86_64/kernel/traps.c
+++ linux/arch/x86_64/kernel/traps.c
@@ -405,6 +405,7 @@ show_trace(struct task_struct *tsk, stru
 	printk("\nCall Trace:\n");
 	dump_trace(tsk, regs, stack, &print_trace_ops, NULL);
 	printk("\n");
+	debug_show_held_locks(tsk);
 }
 
 static void
-
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