Re: Regression in RCU subsystem in latest mainline kernel
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2013-06-15 02:17:38
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On Sat, 2013-06-15 at 12:02 +1000, Benjamin Herrenschmidt wrote:
On Fri, 2013-06-14 at 17:06 -0400, Steven Rostedt wrote:quoted
I was pretty much able to reproduce this on my PA Semi PPC box. Funny thing is, when I type on the console, it makes progress. Anyway, it seems that powerpc has an issue with irq_work(). I'll try to get some time either tonight or next week to figure it out.Does this help ?
It did for me. Rojhalat, did this fix your issue too? -- Steve
quoted hunk ↗ jump to hunk
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index 5cbcf4d..ea185e0 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c@@ -162,7 +162,7 @@ notrace unsigned int __check_irq_replay(void) * in case we also had a rollover while hard disabled */ local_paca->irq_happened &= ~PACA_IRQ_DEC; - if (decrementer_check_overflow()) + if ((happened & PACA_IRQ_DEC) || decrementer_check_overflow()) return 0x900; /* Finally check if an external interrupt happened */Cheers, Ben.