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Date: Mon, 13 Feb 2012 09:23:11 -0800 From: Tejun Heo <tj@...nel.org> To: Ming Lei <tom.leiming@...il.com> Cc: Christoph Lameter <cl@...ux.com>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, linux-kernel@...r.kernel.org Subject: Re: [PATCH] percpu: use raw_local_irq_* in _this_cpu op On Mon, Feb 13, 2012 at 07:03:38PM +0800, Ming Lei wrote: > It doesn't make sense to trace irq off or do irq flags > lock proving inside 'this_cpu' operations, so replace local_irq_* > with raw_local_irq_* in 'this_cpu' op. > > Also the patch fixes one lockdep warning[1], which is caused > by the added local_irq_save/restore(flags) in this_cpu_inc > called by __debug_atomic_inc: kernel/lockdep.c I think this isn't gonna hurt anything but I don't understand why the lockdep warning is triggering when using traced version. Can you please explain that in a bit more detail in the patch description? Thank you. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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