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Date: Tue, 12 Apr 2016 16:15:57 -0700 (PDT)
From: Stefano Stabellini <sstabellini@kernel.org>
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To: Boris Ostrovsky <boris.ostrovsky@oracle.com>
cc: Stefano Stabellini <sstabellini@kernel.org>,
        Vitaly Kuznetsov <vkuznets@redhat.com>, x86@kernel.org,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Jiang Liu <jiang.liu@linux.intel.com>,
        "K. Y. Srinivasan" <kys@microsoft.com>, linux-kernel@vger.kernel.org,
        konrad.wilk@oracle.com, david.vrabel@citrix.com, jgross@suse.com
Subject: Re: Xen regression, Was: [PATCH] x86/irq: Probe for PIC presence
 before allocating descs for legacy IRQs
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On Tue, 12 Apr 2016, Boris Ostrovsky wrote:
> On 04/12/2016 05:56 PM, Stefano Stabellini wrote:
> > 
> >   I am not sure, maybe you didn't have CONFIG_SPARSE_IRQ?
> > But I am certain that 4.6-rc2, with the attached config, fails as Dom0
> > on QEMU with the following sequence of calls:
> 
> I did have CONFIG_SPARSE_IRQ and I just rebuilt 4.5.0 with your config
> (4.6-rc3 doesn't build for me for some reason) and that booted dom0 as well.
> 
> BTW, what do you mean by "dom0 on QEMU"?
 
I am running Xen and Linux inside a QEMU x86_64 emulated machine (nested
virt).