linux-kernel - Re: [PATCH 0/2] ftrace: fixes for PPC

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Date:	Thu, 16 Oct 2008 23:37:05 -0600
From:	"Chris Friesen" <cfriesen@...tel.com>
To:	Josh Boyer <jwboyer@...ux.vnet.ibm.com>
CC:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
	linuxppc-dev@...abs.org, Thomas Gleixner <tglx@...utronix.de>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH 0/2] ftrace: fixes for PPC

Josh Boyer wrote:

 > Are these two merged yet?  I just spent the better part of the morning
 > trying to figure out why various Fedora kernels based on 2.6.27-rcX and
 > 2.6.27 final hung on my G5 and finally got one booting with FTRACE
 > disabled.

Until recently I could boot my G5 with FTRACE enabled, but it totally screwed 
up load balancing.

As of a couple days ago, -tip hung on boot due to the following genirq 
issue:


diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 570d1ea..1c178ae 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -132,7 +132,7 @@ int set_irq_type(unsigned int irq, unsigned int type)
    		return 0;

    	spin_lock_irqsave(&desc->lock, flags);
-	ret = __irq_set_trigger(desc, irq, flags);
+	ret = __irq_set_trigger(desc, irq, type);
    	spin_unlock_irqrestore(&desc->lock, flags);
    	return ret;
    }



Chris

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