linux-kernel - Re: [patch 0/4] XEN: Interrupt cleanups

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Date:	Mon, 7 Feb 2011 21:56:51 +0000
From:	Ian Campbell <Ian.Campbell@...rix.com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Jeremy Fitzhardinge <jeremy@...p.org>
Subject: Re: [patch 0/4] XEN: Interrupt cleanups

On Sat, 2011-02-05 at 20:08 +0000, Thomas Gleixner wrote: 
> Jeremy,
> 
> the following series converts the interrupt chips of XEN to the new
> chip functions and the last patches replace the xen private resume
> hackery.
> 
> The first two patches have no dependencies.
> 
> The last two need the modification to the generic interrupt layer. I
> could either carry them through the genirq tree with your
> acked-tested-whatever-by or I provide you a branch to pull that change
> from. I need the genirq change local as it conflicts with other patches
> in the pipeline. Either way works fine.

I definitely like IRQF_FORCE_RESUME bits, clearly much better than the
current solution.

I applied the complete series applied on top of current Linus tree (with
fixlet from my reply to 2/4 and a little reject fixup in irq.h from
3/4). 

It appears that with all 4 patches applied IPIs aren't getting
resumed/unmasked/something else after a migration.

Adding an irq_enable hook to the relevant irq_chip didn't fix it and I
didn't get a chance to dig any deeper this evening.

I'll look a bit closer tomorrow and get back to you.

Ian. 

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