From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] xen: do not map the same GSI twice
Date: Mon, 21 May 2012 13:51:42 -0400 [thread overview]
Message-ID: <20120521175142.GA13990@phenom.dumpdata.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1205211846510.26786@kaball-desktop>
On Mon, May 21, 2012 at 06:47:44PM +0100, Stefano Stabellini wrote:
> On Mon, 21 May 2012, Konrad Rzeszutek Wilk wrote:
> > On Mon, May 21, 2012 at 04:54:10PM +0100, Stefano Stabellini wrote:
> > > PV on HVM guests map GSIs into event channels; at restore time the
> > > event channels are resumed by restore_pirqs.
> > > Device drivers might try to register the same GSI again through ACPI at
> > > restore time, but the GSI has already been mapped and bound by
> > > restore_pirqs.
> >
> > Which means... what kind of error do we get without this patch?
>
> Xen would print:
>
> (XEN) irq.c:2235: dom4: pirq 23 or emuirq 28 already mapped
>
> and waste a pirq
OK. This sounds like it has been a bug since ..oh forever then?
next prev parent reply other threads:[~2012-05-21 17:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-21 15:54 [PATCH] xen: do not map the same GSI twice Stefano Stabellini
2012-05-21 17:27 ` Konrad Rzeszutek Wilk
2012-05-21 17:47 ` Stefano Stabellini
2012-05-21 17:51 ` Konrad Rzeszutek Wilk [this message]
2012-05-21 18:02 ` Stefano Stabellini
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