Re: [tip:x86/irq] x86: Always use irq stacks

[Thomas Gleixner]

On Wed, 14 Jul 2010, Christoph Hellwig wrote:

> Turns out this wasn't a regression introduced by a commit, but it
> happens when CONFIG_FUNCTION_GRAPH_TRACER is enabled.  From a quick
> look I have no idea why these would interact badly, especially as
> CONFIG_FUNCTION_GRAPH_TRACER works fine with irq stacks if the
> CONFIG_4KSTACKS options is set.

So you're saying, that the problem appears when
CONFIG_FUNCTION_GRAPH_TRACER is enabled w/o being used and that it
exists prior to your patches with irq stacks and 8k stack size, but
works with 4k stacks. That's definitely more than odd.

Thanks,

	tglx

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