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Date: Thu, 10 Mar 2011 19:38:41 -0500
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>,
        "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>
Subject: Re: [Xen-devel] Re: [GIT PATCH v2 0/14] xen: events: cleanups +
 ween off nr_irqs
Message-ID: <20110311003841.GA3063@dumpdata.com>
References: <1299773279.17339.813.camel@zakaz.uk.xensource.com>
 <20110310225726.GA2983@dumpdata.com>
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> I am having difficulties with passthrough of an USB device. Somehow the
> irq count is not going up at all (both in dom0 and domU) and it looks to
> be doing just simple polling. I've rebased the xen-pciback to be on top
> of your changes and apply cleanly. The whole lot is now in #master

I think your patchset breaks the 'xc_physdev_map_pirq' call. Looks like
libxl_pci.c reads from /sys/bus/pci/devices/<BDF>/irq to figure out what value
to pass. With these patches we wouldn't neccessarily pass in the right
PIRQ value. Any ideas?

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