linux-kernel - [PATCH] sched: try to ensure that scheduling bugs reach the user

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Date:	Thu, 24 Sep 2009 17:56:18 +0300
From:	Aaro Koskinen <aaro.koskinen@...ia.com>
To:	mingo@...e.hu, peterz@...radead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] sched: try to ensure that scheduling bugs reach the user

This will help debugging on some embedded devices where bugs and oopses
are recorded by mtdoops.

Signed-off-by: Aaro Koskinen <aaro.koskinen@...ia.com>
---
 kernel/sched.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index 2f76e06..19fe1ef 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -5279,6 +5279,7 @@ static noinline void __schedule_bug(struct task_struct *prev)
 {
 	struct pt_regs *regs = get_irq_regs();
 
+	bust_spinlocks(1);
 	printk(KERN_ERR "BUG: scheduling while atomic: %s/%d/0x%08x\n",
 		prev->comm, prev->pid, preempt_count());
 
@@ -5291,6 +5292,7 @@ static noinline void __schedule_bug(struct task_struct *prev)
 		show_regs(regs);
 	else
 		dump_stack();
+	bust_spinlocks(0);
 }
 
 /*
-- 
1.5.4.3

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