lkml.org 
[lkml]   [2012]   [May]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] xen: do not map the same GSI twice
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


\
 
 \ /
  Last update: 2012-05-21 20:01    [W:0.061 / U:0.184 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site